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(1)Review. Some. of Middle. Platform Late. and. Conodonts. Triassic. the. of. in. Japan. By. Toshio. Abstract.. Six. Triassic nomy. important. carbonate. and. KOIKE. from. conodonts pl左tform in Japan are described.. rocks. of these. classi丘cation. the. Upper. and. in. problems. taxo･. discussed.. are. conodonts. platform. Middle. Several. Introduction Tbe. conodonts. platform. Upper. and for the. Triassic. throughout. biostratigraphy. in taxonomy. and. fusion. to. seems. In. 1979,. Triassic. It. sium. (ECOS. rock. bearing. and. others.. fossils. guide. splte. remains. II) held. in. Vienna. rich conodonts ′rhe comparison. Neogondolella. (HAYASHI),. and. N.. platform. and European. the. meetlng At. of Japan. with. that. time. conodont. Sympocarbonate. much. Dr. R. MocK Europe. of. also. conodonts.. Middle gondolellids of the E. ♪rimitia MosHER, (HucKRIEDE),. problematic. abneptis. On. his conodont Carpathians,. Conodont. and. con-. that. and. west. collected L. KRYSTYN, Dr. of. guidance. problems serious. progress. the. Second. in 1980. of conodonts. but. (HAYASHI),. the. kind. a. author. Austria. Praha. and. under. investlgate. Epigondolella. during. trips. the丘eld. on. present. Feuerkoger,. slgni丘cance. the. Budapest.. to. Middle. the. many. the photographs. observlng. for the. visited. in. held. for. deep. their. Of. there. realm. discussed. helpful. he. Seven Triassic,. of Tetbyan were. very. availed to important. greatly. and. taxonomy was. specimens. Furthermore, work. Czechoslovakia. world.. determination,. the age. conodonts. platform. the problems. the. useful In. classi丘cation of gondolelliform conodonts and in the disturb the progress of conodonts. study to had an present opportunity author attend. the. on. are. gondolellids. foliata (BuDUROV),. N. nauicula. polygnathiformis (BuDUROV. E.. (HucKRIEDE),. STEFANOV),. and. are. Upper. and. spatulata. N. nodosa in reviewed. this paper. is to Dr. Kiril BuDUROV appreciation extended Dr. Heinz KoztJR Museum, Of Staatlicbe. Grateful Science,. of Hungarian. GeologlCal. Wien. for valuable indebted to Prof. 1ng. Of the. discussion Hisayosbi A. manuscrlpt.. for providing School kindly. conodont sent. Institute,. the. and. Dr.. Leopold. Academy Of Bulgarian Dr. Sandor KovACS. KRYSTYN. Of the. University. Of of. in Budapest. The is much meeting author IGO University for critical readOf the of Tsukuba to his friend Kozo Mr. WATANABE particular thank at. samples.. photographs. the. Mr.. Shingo of. some. HAYASHI holotypes. Of Ohmama proposed. Senior by. him.. High.

(2) KoIKE. T･. 16. Paleontology. Systematie. Type Epigondolella. 1968,. 935･. p･. 1970,. BENDER,. is. by. the. The. Of the platform･. marglnS. of. presence. lateral. type. the. (HucKRIEDE),. abneptis. characterized. the. along. 530･. p･. Remarks:-Epigondolella genus,. 1968. abneptis HucERIEDE. Polygnathus. species･. MosHER,. Tardogondolella. MosHER,. Epigondolella. Genus. node-like denticles. denticles. or. projections. this. of. species. beside. appear且rst. the. to. The the posterior stage･ carina extends ontogenetic is located the The main denticle at posterior terminal part of platform･ of central in adult The stage･ in early portion of the platform stage and in the central pit beneath to. in early. denticle. main. to denticle is circular main in younger stage and usually (BロDロROV, 1977) is observed. the. rectangular structure. comb the. lateral. Epigondolella. MosEER. and. primitia. development. ontogenetic. of the. the. and. nodes,. denticles. some. and. in. bifurcated the. on. the. common. the. platform,. platform･. features. external. Subcircular Honeystage･. of. (HAYASfII). E･ spatulata. lS. adult. margins. on. carina. loop. the. elliptlCal and. the. show. same. Ei)igondolella. with. MosEER･ E･ multidentata Epigondolella bidentata MosEER･ abneptis (=ucKRIEDE)I denticles along the lateral E. postera (KozuR MosTLER) also have and and Of the. marglnS. development They. and. have. plt. and. the. main. a. on. a. external. basis. the. of. features. compared. loop･. included. the. Epigondolella. abneptis. E. multidentata, (1977), however,. lenticular. shaped. the. denticles. behind. BロDUROV. basal丘eld,. E･. (1977) regarded. Metapolygnathus. as. Epigondolella. E･ postera･. and. (HAYASHI)･. nodosa. which. which Then. Ei,igondellella. contains. abneptis illustrated. Epigondolella. not. be. (DIEBEL). on. the. Therefore,. bidentata. However,. Range. them.. features. external. Epigondolella. other they. typical. nodes could. in Epigondolella･. included. The. not. by. Neogondolella. of this species･ specimen or has no distinct denticles type of Metapolygnathus, species communisti, Therefore, Neogondolella in the middle communisti part of the platform, BuDUROV. is. to. thin. of. sPatulata N･ (HAYASHI) and. communisti. group･. terminal･. of the and. a. end,. distribution. posterior. structure. ontogenetic. Ei,igondolella abneptis. with posterior. The. different. indicate. species. pointed. with. MosHER. primitia. Neogondolella. bidentata,. these. polnted posteriorly to denticle extends. the. includes. However,. platform. narrow. Epigondolella he. platform･. of. the. should. the are. group. ontogenetic. Carinella. hand,. of. pit, also. loop. recognized is somewhat Ladinian in the. each. other. group. and. characterlZlng. Carinella. mungoensis different between. development. is. separated. denticulation in. restricted bidentata Epigondolella be. and. indicates. to. represent. Lower the. Late. homeomorph･. Carnian･ Norian･.

(3) Review. of Some. Conodonts. Platform. Middle. the. of. Late. and. in Japan. Triassic. 17y. abneptis (HucKRIEDE). Epigondolella. Pl. 3, Figs.ト21 Polygnathus. HucKRIEDE,. abneptis Pl. 14, Figs.ト3,. Gladigondolella EI'igondolella. 1958,. 12-14,. 16-20,. 157,. 22, 26,. 1965,. MosHER,. (HucKRIEDE). abneptis 20, 21; CLARK et al‥ 1979,. Figs.. Figs.ト7, KoLAR,. Pl. 4, Figs. 1979,. IsozAIくI Epigondolella. 314,. p.. 1,. 1982,. Pl･ 4;. 5;. KoIKE,. Pl･. 198l,. abneptis. (HucKRIEDE). BENDER, (HucKRIEDE).. 2,. abneptis. abnepiis. 1970,. 1979,. 18?, 22130,. Pl･ 1,. Pl･ 1, Figs･. 3, 4;. p･. Fig･. non. Pl. 2, Figs･. 1-8･. 1980,. Pl. 13, Figs.. 8-11･. 531,. Pl. 4, Figs･. p.. non. 17,. 16,. 26, 27,. Figs･. 3-6,. KRYSTYN,. 30-36,. 6(g-i)I. Figs.. 1979,. Group,. Pl. 1, Figs.. abneptis. Pl. 118,. KuwANO,. Research. 11ト115,. p.. p. 936,. Fig･. Pl. 12, Figs･. 33?, 58?. Pl. 1, Fig.. 299,. p.. 1968,. Tambachitai. 2, Fig.. Pl.. MATSロDA,. and. abneptis. Tardogondolella. 4, 7;. Pl. ll, Fig.. 27, 32, 47-57,. ZANKL,. (HucKRIEDE).. abneptis. 156,. p.. 21?,. 28;. 5,. 30, Pl･. 29?,. Fig.21. Tardogondolella. KozuR. (HucKRIEDE).. MosTLER,. and. Pl. 2, Figs･. 1971,. 7,9. Metapolygnathus. abneptis. Figs.. 12-18;. Figs,. 2, 3, Pl. 4, Figs.. et. KozuR,. 1980,. al.,. Gladigondolella. 1974,. p.. Metapolygnathus. Description:-Platform 丘rst appears. denticle.. At. upward. in. and. denticle half. and. center. and. behind. and. 15. to. but. ln. at. denticle. in. and. similar. in. extend shape. end. located. very. distinct. and. in. indistinct. of. posterior. denticles. node-like. posterior. Posterior in immature. to. extends. maiI-. form.. mature. form, in. and. Pit broad. and. form. immature. distributed. on. nodes. synonymies. were. given. by. BuDUROV. (1977) and. KovACS. (1980). abneptis (HucKRIEDE) distinguished each other in. Epigondolella easily. form. faint. are. Keel in immature narrow and high shallow. lov in mature Loop to form. rectangular subcircular Honeycomb faint bifurcated in mature form. structure. KozuR. strongly. mature. and. and marglnal Remarks:-Detailed. are. at. center. main. quadrangle beside compressed. two. or. situated. of. posterior. third. of. pair. to. elliptlCal. radial which form. Carina. One. GupTA. surrounds. they. and. libs in. mature. 2;. a. and. platform. shape. anterior. 16 denticles.. Main. marglnS. and. Crenulation. or. stage. anteriorly,. gourd-like. 1,. 3.. 2, Fig.. and且at. add. 5.. Pl,. 562, 564, 565,. p･. 23.. ontogenetic. Platform. to. to. strong. early. 4. somewhat. be. to. denticle.. stage,. subcircular and. bears. 69,. p.. 7, Fig.. denticles. in middle. terminates. carries. main. early. and. 1968,. Pl･ 7, Pl･ 3,. 14, Figs･. Pl･. 6, 7, 9, 10･. denticle. main. to. amount. form,. in. absent. 1980,. 1980,. and 4, Figs.. Pl.. 1972,. marglnal. 血ally. of platform but tend. form,. in. growth,. immature. HAYASHI,. beside. KozuR,. and. 10-21,. Pl. 6, Figs.. 1972,. KozuR,. 1, Pl.. KozuR,. slovakensis. denticles. KovACS. 3, Fig.. Permica. abneptis. KovACS. 18;. p.. 1, 3;. Pl.. 592,. KozuR,. (HucKRIEDE).. abneptis. mature. form.. elongated platform. Occurrence :-Uppermost. Repository :-YNUC. and immature. Epigondolella. Carnian 1336-1351.. EpigondoIQlla. abneptis to. Upper. form. tends. Norian.. spatulata (HAYASHI). However, to. possess. they. are. a. thick. quite and.

(4) 18. T.. KoIKE. primitia MosHER. Epigondolella. Pl. 1, Figs. Epigondolella. MosHER,. ♪rimitia. WATANABE, 7-ll;. 1972,. KuwANO,. 13, Figs.. 1970,. Pl. 2, Figs.. 1979,. MosHER.. Describtion:-Platform marglnal Platform. denticle. shows. behind. mature. This. stage.. platform.. On. expanded. platform.. and. are. KozuR,. 1974,. and. abneptis Koz口R,. KovACS. and. KozuR,. Pl. 3, Figs.. and. broad. form.. mature. abneptis (HucKRIEDE). the. each. anteriorly short. other. elongated laterally. and. Norian.. p.. 9-14;. sカatulatus 1980, p. 1980,. 1968,. KozuR,. 4, Figs.. 22, Pl.. 21,. BuDUROV, IsEIDA,. 566,. Pl.. 3,. 569,. 4;. Pl.. 4, 6-8,. Pl.. Figs,ト4.. Pl. 3,. Figs.. 7, 8, Pl.. 1979,. Pl. 5, Fig.. 12. et. Pl, 3,. Gup′rA. 4, Figs,. 5,. 38, 39,. p.. 3, Fig.. GAZDZICKI. 568,. Pl. 14, Figs.. 4, 6-8,. 5.. Pl.. 1972,. 1977, 1979,. (HAYASHI). 565,. 69, Pl. 2, Fig.. p,. al. Figs. et. al.,. Pl.. 4,5, p.. 592,. Fig.. 4. Pl.. 2. 16 2. Fig.. 1. (2-9)?. abneptis. Epigondolella. and low.. 22-46. (HAYASHI).. (HAYASHI),. spatulatus. KovACS. 3, Figs.. spatulatus. 5, 6, Pl. 5, Figs.. Metapolygnathus. in. nodes. spatulata (HAYASHI). HAYAS甘Ⅰ,. spatulata. spatulatus. Metapolygnathus. covers. 1311-1316.. abneptis 1-4;. Keel. possesses. Lowermost. to. node-like. structure. distinguishable by. abneptis. growth, 5 to 6.. two. or. marglnal. and. Epigondolella. characterized. Carnian. At. main denticle and Carina bears 16 to 17. shallow.. morphologlCaly. is. appears. to. amount. bifurcated. remarkably. Pl.. Metapolygnathus. of carina,. resembles. they. :-Uppermost. Gladigondolella. side. elliptlCal and. Epigondolella. Epigondolella. Pl.. beside. One end. Honeycomb. denticle.. side, Epigondolella. Repository :-YNUC. 4, Figs.. 1-5,. 1980,. denticle.. of unit.. posterior. each. species. the other. Occurrence. 5, Figs.. and. 18, Figs.. of denticles. pair. main 血ally. they. length. main. closely. However,. around. with. Pit. carina. form. species. :-This form.. iriimmature. Pl.. KRYSTYN,. 6;. compression. near. for furrows on. elliptical in younger Remarks. p.. SAKAGAMI. 17;. 16l,. 4, 5.. A. stage.. and. of whole. present. except platform denticles posterior. in. thirds. located. be. may. quadrangle. two. Pl. 3, Figs.. early. anterior. denticle. over. Loop. 16,. 7-13, 1973,. 8, Pl. 2, Figs.ト3,. introduced. toward. than. Main. denticles. Figs.. MosHER,. 1979,. in. platform. elongated. more. denticles.. IsHIDA. absent. and. appear. nodes. occupleS. Pl. 110,. 18, Pl. 1, Fig.. p.. primitia. main. 740,. p.. 3, 4, 6, 7;. 1-7.. Metapolygnathus. beside. 29-36. KoIKE,. (HAYASHI).. spatulata. KRYSTYN,. (HAYASIII).. spatulata. 1981,. 1980,. Pl. 2, Figs,. Pl.. 13, Figs.. 12-14.. 32-36.. A. Description:-Platform beside. duced. At 3 of. growth, to. 4, total. main. lib-like. length. of. and. denticles. marginal. and. absent. denticle. ridges unit. occur. in. in. early. subcircular. add toward in radial.. mature. stage.. form. pair. platform. anterior Platform and. A. of. projections. surrounds. main. and they丘nally developed along. its marginal. outline. intro-. denticle. to. amount two. thirds. subCircular. to.

(5) Review. Some. of. heart. elliptlCal,. or. Carina. upturned. 12 denticles. in. mature. of central. inner. at. part. of platform and. elliptlCal. Chert. Formation. men.. Due. lng. by. HAYASHI's. referred This. He丘gured. upturned. a. to. this. 丘nely. to main. posterior broad. and low. p.. pltted. denticle,. the. keel,. Norian. the. to. BENDER. been an. by. misinterpreted. Of observ-. opportunlty. large. of. number. specimens. Limestones. to triangular subcircular the lib-like denticles. lower. shaped the. on. triangularis. Norian･. of Upper. part. STOPPEL,. and. 1965. TATGE. mombergensis 343･. p･. 938.. MosHER. (1970, 1973) and. coarsely. low. marglnal. p. 72.. Neogondolella. objective diagnosis,. and. mature. this species.. of. 1965,. 1968,. SwEET. in. shape. (1980), Anchigondolella. Gondolella. STOPPEL,. 1968a,. Remarks:-As. had. obtained and Kamura. Lower. of. species.. MosHER,. to. elliptical. by several Ei'igondolella abneptis (HucKRIEDE) KovACS (1980a) listed up species. and KozuR. as. Neogondolella. and HAYAStII,. has. a. synonym. 1352-1366･. BENDER. main. ^from the Adoyama immature single speci-. a. only. and. posterior. obtained. author. KRYSTYN. Repository :-YNUC. Paragondolella. elongate. small. by. is characterized. more. or. well. pit beneath. the. largely. the. gave. an. unorhamented or. terminal. the. platform, less. CLARE二(1966). and. subtermi工al. briIT], the postetior denticle, and the tinflared. developed main. loop.. HAYASHI. (1968). from. Neogondolella. free. blade,. main. by. part. Metapolygnathus. marglnS. species. marglnS. occurrence:-Upper. Neogondolella. platform. by the thin and. Junior. be referred in detail.. Type. and. the. mature. Genus. but. also. Taho. illustrated. specimens. synonymies. he. Loop. in Y. was. in. pit beneath. low.. and. denticle･. main. form.. out. pointed tO be. this. present. platform. of the. should. the. species. Seems. authors. descrlptlOn,. and. margin posterior As already. the. (1968).. is characterized. the. Many. HAYASHI. from. species. B口DUROV. species. holotype this. platform,. of ,this. Basal. developed. be. but. bifurcated on. holotype. Fortunately,. authors.. to. and consplCuOuSly faint and covers. insu圧icient. to. broad. form. structure. nodes. Remarks:-The. Keel. shape.. slightly carries ll to. may. stage,. form･. in mature. 19. nodes. from. sides. in early. distinct. in Japan. of platform, denticles. outer. and. and. indistinct. and. in immature. Honeycomb. several. terminal. With. part. node-like. inner. both. on. Triassic. marglnS. central. of posterior to One three. or. posterior. small. rectangular. form.. extends form.. Late. and. Lateral. shape･. to. Middle. of the. Conodonts. quadrangle. on. posterolaterally Main denticle. denticle,. Platform. the. denticle,. because. deep. and. Metapolygnathus. proposed. the. of the. furrovs bifurcation. square. each. side of. the. and. shaped. distinguished. loop.. the. Most. distinct. the. platform,. of carina,. Metdpolyg￣nathus. posteriorly. of. these. anterior. subterminal morLphologlCal.

(6) 20. KoIKE. T.. characters. Metapolygnathus. of. (TATGE),. mombergensis three. species. differ from those certainly Neogondolella. HAYASHI SPeCies of. type. Metapolygnathus,･. to. assigned. Metapolygnathus. type M. 1inguiformis HAYASHI, species of Metapolygnathus, Hovever, is a that are there these three species possibility Neogondolella and STEFANOV). polygnathiformis (BuDUROV occurs. a. not. that. possibility. genetic. the. communisti. Furthermore,. SwEET. morphological. but. characteristic. Polygnathus. is. features. HAYASHI,. communisti and M. noah. HAYASHI.. junior. a. synonym. of. Consequently,. there. of Metapolygnathus. of. are. (1973) concluded that MetaNeogondolella of polygnathiformis.. synonym. as (1973) regarded Metapolygnathus because Metapolygnathus is morphologically. Neogondolella,. (1968) represented. SwEET. one.. speciBc. junior. a. Neogondolella. of. junior. a. synonym. of. indistinguished. from. Negondolella. On. the. genusI. other. hand,. However,. the. the. among. platform. be. is also. junior. a. dolella. ealiest. in. in. P.. (1973). swelling. two. as. development e.. (H口CI(RIEDE).. KozuR. in. Gondolella. includes. species. Gondolella few. Neogondolella. (Gondolella. small. nodes. projections. are. also. observed. Neogondolella. foliata (BuDUROV). gnathiformis,. N･. and. obsel･ved mature. bulgarica in Fig.. STEFANOV) in stage･. and. 8. on. the. other. Plate. STEFANOV). 2 in KovACS. side, the. appear nodes. in. on. the. nat,i.Cula. Gondolella.. N.. KoztJR,. anterior platform. Their excelsa,. (1980). expressed. transitional. between it has. because such. a. node-like. Neogondolella. 2 in this. and. and on. in. (1980) regarded Epigondolella and. However,. Plate. N.. Neogondolella. margins on. pattern. observed. also. CLARK),. be. platform.. ll-25. the. be. Epz'gondolella,. and. a. Metapolygnathus. KozuR. and would. of the. and. generally. poly-. Koz口R. besides. KovACS. Figs.. (BuDUROV. Neogondolella On. KovACS. anterolateral in. Metapoly-. and. and. can. and. communisti. part. to. of Paragon-. However,. (MosHER. polygnathiformis. on. unit. included and to Neogondolella. MosHER.. anterior. growth. j'aragon-. under. Species. species. Neogondolella). and. in the. of the processes.. placed. Metapolygnathus. ealiest. a. his. of Metapolygnathus. Metapolygnathus. valid. and. of. Paragondolella. included. synonym. lenao･th. constricta. a. Metapolygnathus. that. junior. lack. emended. the. out. type. (1968) dis-. the. Metapolygnathus. to. (1972, 1974, 1980) and. of Paragondolella. opinion. excelsa. in. a valid different. out differences between the ontogenetic Neogondolella as introduces the platform. in. the. considerably MosHER. platform he turned. species MosHER,. posterolateral. communistz'as. Carinella. Two. entire. platform g. Neogondolella. Neogondolella,. the. or. node-like. of. Metapolygnathus. a. pointed. most. along. it. as. Metapolygnathus;. and. of. a. (s.s.), and. assigned. regarded. gnathiformis.. introduces. Gondolella. i,olygnathiformis,were. Neogondolella. lack. the. as. by (s.s.), Neogondolella how･ever, MosliER (1973),. stage.. because. was commLmisti MosHER. gnathus. type. Gondolella. of Metapolygnathus. 1968, Paragondolella. synonym. dolella, and. of. from. are. in Paragondolella.. true. ontogenetic. recognized. MosHER. lateral. is. Paragondolella,. on. concept. Metapolygnathus. on. same. Paragondolella in the. Metapolygnathus. recognized. authors. concept. The. authors･. tinguished. stage. some. (e. g. N.. paper,. poly-. bifurcata (BuDUROV 1980). platform margins. ′rhe nodes margins in. Epigon-. in.

(7) Review. dolella. Some. of. Platform. Brst. introduced. are. in early. ontogenetic. treated. Metapolygnathus. feature. part. unlt,. (1980)･ KRYSTYN's or. composed. denticles. on. Neogondolella. lella is. STAUFFER. thick the. and. however,. be. can. posterolaterallyflaring be a direct ancestor to. ferous are. conodonts,. MERRILL. Carboniferous. Upper. that. species. Neogondolella･. of that. The. Permian. and. with. Upper. phylogenetically. paragondolella･. by. discussed. alr甲dy. Paragondolella the. and and in. the. be. a. forerunner. the. deposited. German-type and. lineage. lineage. were. Neogondolella genetic. have. of. is qulte. development. yet. in. and. biogeographic. evolutional. oplnion. the. related. BuDUROV. Neogondolella,. and. Epigondolella. and. According. was. BuDUROV. to. (BuDUROV. he. and. intimately. conodonts･. (1977),. STEFANOV). and. N･. navicula. German-type. lineages to. mombergensis. Neogondolella of BuDUROV's denticle at posterior the distinct main of the denticles. However, trend. On. the other. g. Neogondolella. e.. abundantly. interesting･. is. they. and. species. hiatus･. Neogondolella,. and neo-. on. the. toward. carina. in. its descendants and mombergensis thought found even in cherts which. been. remarkable. of BuDUROV different. The. Neogondolella not. their. and Neogondolella. considered. platform, in height. decrease. of. any. without. and. elongated. In Japan,. Paragondolella. lineages. the. tendency. part.. central. Balkanide-type be. by. to. Balkanide-type. recognized. CarboniKosENKO. represent. conodonts. bulgarica. seem. BITTER. foliata, N. polygnathiformis,. lineages.. two. of the. is characterized the. (1976a). of Neogondolella. evolution. terminal,. Neogondolella. B口D口ROV. otllerS.. Neogondolella. from. includes. lines･. and. pit. Triassic. and. Epigondolella,. in earli白r. author. evolved. genus. on. concept. the. Permian. Metapolygnathus. the. Carboniferous. Neogondolella-like. Metapolyghathus,. BuDUROV's. by. Gondolella. Upper. agrees author Neogondolella Triassic. Upper. prominent. Von. present. Carboniferous. of. other side, Upper G. donbassica and. these. in the. Gondo-. the. the. neogondolelliform. Lower. (1976a, 1977) discriminated. On. concept. elements. ridges, the Carboniferous. between. relation Neogondolella. and. considered. regards. the. elements. species. Neogondolella. unlque. same. Gondolella,. of. related. of the forerun-. a. (1980) ; Neogondo-. clarki KoIKE from Neogondolella.. Gondolella. (1977) discussed. gondolellifoTm. These. indistinguishable. morphologlCally. from. Of Neogondolella.. as. such. the. transverse. sinuous. loop.. KozuR. species. as. the. represented. and. communisti, features. of the. nodosa. type. distinguished. by. ornamented. platform. The. PLUMMER,. in the KozuR. and. (HAYASHI). and. also. diagnostic. (1980) discriminated. basis. the. on. KovACS. (1972), and. of Gondolella.. synonym. KRYSTYN. (1980), however,. KozuR. KovACS. Metapolygnathus. Neogondolella. regarded. KRYSTYN. with. junior. a. lella elegantula Carboniferous,. not. and. Epigondolella.. of. of. by. out. pointed. Epigondolella. and he. also. is monotypic,. of this species.. morphotypes. Meta♪olygnathus. marginal ner. two. of. between. Which. Metapolygnathus. (1980) the. its pit is situated. communisti;. was. denticle. main. KRYSTYN. because. genus. 21. in Japan. beside. anterior.. independent. an. Triassic. denticles. toward. pit in Metapolygnathus. the. of. and. Late. and. sharp. and. developed. as. Middle. the. of. distinct. as. stage. of the basal. middle. Conodonts. occur. in. distribution･ more. between. band,. the. haslachensis This. Japan･. BuDUROV's. detailed. elements. of. (TATGE), the. means. on. concept. comparison. Neogondolella. to. and. of. onto-. Paragondo-.

(8) T.. 22. has to of BuDUROV is distinguished If Neogondolella. lella. in the. tion. as. Metapolygnathus. paragondolella. The. type. fairly. there. (1976a) proposed,. lella and. be. carried out to obtain from Paragondolella and. sense. BuDUROV. or. KoIKE. species. remains. be separated. should. included. be. should. in. deformed. each. problem. Metapolygnathus Paragondo-. the independent. as. other. as. junior. a. is poorly. M･. evalua-. proper. whether. Metapolygnathus. Metapolygnathus,. of. serious. a. a. communisti, it is difBcult. genus. synonym.. and. preserved to. Consequently,. that. cracks･ conclude with based on illustrated is in center the the丘gure the of platform pit situated is the most important diagnosis by HAYASEI (1968). This character of MetapolyKRYSTYN Anyway, sense KovACS KozuR (1980). in the (1980) and of and gnathus must be studied in detail whether this the holotype of Metapolygnathus communisti some. the basal. of Neogondolella species is a junior synonym that the genera The present author concludes they are included in Neogondolella, because. polygnathiformis Paragondolella have. or. a. and common. many. species･. valid. Metapolygnathus morphologlCal. characteristics.. foliata (BuDUROV). Neogondolella Pl. 2,. foliata BuDUROV,. paragondolella Figs.. 4,. 1978,. 1-4;. 90, Pl･. p.. 1976b,. 1, Figs･. 1980,. paragondolella 15, Figs.. developed. and. part. BoyANOV. 30. median. BuDUROV, 6,. direct. but. in early. absent. toⅦ･ard. form, beneath. toward. indistinct main. denticle to. form.. for. furrows. narrow. Remarks. mature. and. tends. anteriorly. smooth. and Carina to extends. They. Neogondolella. easily. navicula,. is parallel. to. as. the the. ln. form,. large. near. platform inward. bend. to. form,. anterior two. in. distinct. car-. graand denticles. end. node-like denticle main. than. denticle. anteroend,. posterior. at. and. immature. located shallow, Subcircular, Loop Keel thick and low･ groove･. Basal. plt. narrow. form. and. laterally. postero-inner. observed. well. structure. side. species. however,. are,. denticles. :-This. Honeycomb. Main. side･. in immature. each. and. first in posterior. thick. tapers. elliptlCal. semicircular in mature. 1, 2?. KovACS. produced In. growth･. tapers. form･. mature. and. Figs･. 3;. 1973, p･ 109, 110･ Pl･. and. stage,. at. anterior. postero-inner. in. 1,. 2,. KoIKE,. crenulated. margins usually near discrete, highest Denticles Ties 17 to 18 denticles. One or in height decreases toward dually posterior･ be larger denticle, and they may behind developed main to. Figs1. BuD口ROV,. and. Pl･. 1979,. Pl･. STEFANOV)･. and. lateral. tend. CATALOV. Pl･. 1976a･. BuDUROV,. i-22;. 18, 35;. 80,. p.. Figs･. only.. in posterior central part, Platform denticle. margin. broadest. and. 1977,. (BuDUROV 26,. DescriPtion :-Platform. i,. 3, 5.. Polygnathiformis 17, 18, 20-24,. Pl･. Pl･ 2, Figs･. 101,. KovACS,. Pl. 6, Figs.. 1ト25. 79, 80,. p･. p･. 13-15;. (BuDUROV).. Gondolellafoliata KozuR,. 1975,. BuDUROV,. Figs.. all. over. projects. platform. except. of carina.. is quite. similar. to. discriminated denticles basal. on. margln,. Neogondolella each. the and. carina. the. other. (HucKRIEDE)･. nauicula in. form･. younger. are. broader,. the. main. denticle. is. more. crest. In. of the distinct･.

(9) Review. of Some. Neogondolella early. foliata In. stage. inner. an. and. distinct. Platform. Conodonts. usually. bent. laterally. in the. crenulation. the. at. anterior. behind. and. and. may. middle. 23. in. even. platform. in the. even. in Japan. denticle. thicker. denticle,. main. portion. Triassic. main. foliata has. Neogondolella. platform. Late. and. denticle. a. possesses. form,. mature. Middle. of the. margins. have. more. part. of the. platform. Neogondolella this. resembles form with. However,. species.. honeycomb. the. unlt,. posterior. Occurrence. is restricted. are. marglnS. is less. distinct,. the. and. Ladinian. :-YNUC. 1325-1330.. Neogondolella. HucKRIEDE,. navicula. Figs.. 2-8, 1;. Fig.. 10, 15-22,. ZAWIDZKA,. KozuR,. navicula 27, Pl. 117, Figs.. Paragondolella Pl.. 290,. 6,. P工SA. et. Neogondolella. 1976,. elongated. beneath. Figs.. al.. 109,. A-F,. 148, Pl.. ll, Figs. 1975,. 41, Fig.. 14?, Pl.. i-4,. Pl.. GupTA. toward. 23,. 13-19,. 12,. 27, 35, Pl.. Figs.. 4?, 5?,. 4, Pl. 42, Fig.. 6;. Pl.. 24,. KovACS. Pl. 2, Figs.. Pl. 7,. Figs.. 1974,. SAHNI. CHIIABRA,. (1-6)?;. (C-E)?,. p. Sol,. STEFANOV,. and. 17, Figs.. p.. or. 819, Pl.. 818,. T?;. and. KoIノAR,. 1979,. Pl.. 1, Figs.. 1974, 317,. p.. 289,. p.. 318,. Pl. 1,. 1,. Figs.. :-Platform. and. slightly. end and for furrows. 4?, 7?; in. absent. MosHER,. KoIKE,. 2,. 1973,. 1981,. 168,. p.. side. Keel. of. broad. to. Basal. low.. were. synonymies. basal. structure. carina･ and. 2?, 4?, 5?, 8;. Pl. 20, Figs.. (19-24)?;. Figs.. stage･. ･early. curved and subparallel distinct. Honeycomb each. Figs.. GupTA. Pl. 2, Figs.. In. form,. mature. Loop. provided. obs､erved plt. platform. carina Of denticles denticle over. all. elliptlCal, shallow. elliptlCal GEDIK. to. by. nar-. 14 to. on. Main. margln.. ll, 18; RAFEK,. and. 12, 13.. toward anterior′. Denticles marglnS size. Outline of upper. subequal. denticle.. Pl. 4,. tapers. gradually and. 518,. p.. 2?. 7?, 8?, Pl.. Pl. 1, Figs.. Pl.. 1970,. 60, Fig.. (HucKRIEDE).. navicula 132,. 211,. broad. main. BENDER,. alリ1979,. Remarks:-Detailed et. p.. (Huc王くRIEDE).. 210,. p.. 15, discrete,. except. on. (HucKRIEDE). BuDUROV. Pl.. navicula. Description. posterior. in height. et alリ1980, (2-6)? MosHER, 1968, p. 939, Pl. 116, Figs. 20(HucKRIEDE). navicula 1-5; SuDAR, 1977, Pl. 5, Figs. 13, 14, 18, 19, Pl. 6, Figs. 20, 21.. 1975,. navicula 1975, p.. GEDIK,. straight. the･. of. 2, 6.. Figs. Neogondolella. rov,. suddenly. TRAMMER,. 2?;. (HucKRIEDFJ).. KoIEE,. the crenulation. plaト. 28-33. 147,. p.. Pl. 37, Fig,. Pl. 13, Fig.. navicula. 35, 36;. upturned, decreases. thirds. Carnian.. Figs.. (25-27)?;. 1975,. 1980,. and Paragondolella. 1958,. 24,. strongly. navicula. Pl. 2, Gondolella. posterior. Lower. to. the. polygnathiformis,. within. carina. considerably. two. more. much. :-Upper. Repository. STEFANOV). and. in Neogondolella. strtlCture. platform. the platform. (BuDUROV. polygnathiformis. near. platform and lies. rectangular. PISA. (1975) and. (1979).. The material. specimens of Middle. Neogondolella Occurrence. referred Triassic. navicula :-Norian.. to. this. species. by. many. authors. be discriminated, because should in is restricted (HucKRIEDE) the Norian･ strata. based. the. on. range. the of.

(10) T.. 24. KoIKE. 1331-1335.. Repository :-YNUC. Neogondolella. (HAYASIiI). nodosa. Pl. 2, Figs. Gladigondolella. HAYASHI,. nodosa. abneptis. Tardogondolella. nodosa. 1968,. p.. 69, Pl.. KozuR. (HucKRIEDE).. nodosa. 1-10 2, Fig.. 9.. MosTLER,. and. 1971,. Pl. 2, Figs.. 10,. ll, 13? Tardogondolella. abneptis. Pl. 8, Figs.. (HAYASIII).. nodosa. TYN,. (HAYASI-II). KozuR nodosa 1973, p. 138, 139, Pl. 3, Figs.. Figs.. 1-4,. 2,. Pl.. 3, Figs.. p.. 109-111,. Epigondolella. 5?, 6?, 7, 8?, 9-14,. 1974,. 1,. Figs.. upturned in. unit. platform near. and. rapidly Pit beneath. in. immature. illustrated. not. holotype. and. (BuD口ROV of the. HAYASHI. However,. the. from. on. crenulation. form.. They. distinct ontogenetic. Occurrence. of. inner. the. MosHER :-Uppermost. Repository :-YNUC. and. a. speci丘c relation. latter. as. that are. lateral. of and. not. Keel. other. Carnian. 1317-1324.. be. of of. Carina. extends. to. high,. and. rather. posterior low.. and bifurcated. in. end. Loop. mature. margins.. the. platform. shaped, third portion. broad. any. and. tongue. lateral. anteriorly located near. other. Most. than. the. were. specimens between. comparison. difBcult.. Neogondolella. with. Epigondolella. of. developed. the. of. Figure this. 36,. p.. (8-ll)?;. anterior. inner. platform. at. posteri･or. of. nodes any. 1977,. the. of the illustrated holotype. How-. variation.. sides in. Figs.ト3;. Figs.. ♪olygnathiformis. in the also has crenulation distributed. and irregularly. is faint. observed. near. may. whole. 4,. 3,. to. growth.. denticle. elongate. Pl.. 91,. width. preserved. toward. appear. anterior. 1982,. Figs.ト4.. shallow.. on. ll, Pl.. BuDUROV,. p.. anterior. is considerably. this species. development. dolella primitia. and. 10,. Figs.. It elliptical. in. Main. resembles. to. seem. toward. 1t. species. nodes. and. occurs. close. The. However,. this. of. a. represents. platform.. platform. 12,. (1968). Consequently,. STEFANOV)･. and. Pl.. height. observed is poorly. and author畠material have in more this paper specimens ever, falls within this di庁erence species. 7,. rectangular. the. This. 3,. 1978,. stage.. elliptical. holotype by. Pl. 57,. 55, Pl. 2, Fig.. MATSUDA,. and. 4, Figs.ト3;. Pl.. early. posteriorly.. structure. Remarks:-The. 435,. p.. 54,. p.. IsozAKI. at node-like projections bears 13 to 15 denticles,. form,. ･elliptlCal form. Honeycomb. (8-10)?; KRYS･. 1974,. 1978,. into. denticle,. main. in. Pl.. 1972,. Fig.. Crenulation. in height. decreases. 3, Figs.. lsHIBASHI,. 4?;. BuDULOV,. in. tapers. terminal,. posterior. 3, Fig.. ll,. 10,. ll,. absent. developed. and. RAMOVS,. and Pl.. 1980,. form.. mature. 17-19;. KozuR,. CATALOV. Description:-Platform marglnS,. and. 16?,. 3, Figs.. Pl.. 6-8;. KozロR,. and. on. p. 57, 58,. 1, 2.. 14-16,. p.. KoIKE. Pl.. Pl.. 1972,. 2A;. 1978,. (HAYASHI).. Figs.. 5,. KovACS. 1975,. GHEORGHIAN,. and. MosTLER,. and. 15?,. MATSUDA,. nodosus. Pl.. 37,. 2, 4, 5;. Pl.. Metapolygnathus KozuR,. MIRAUTA. 3, 7, 8.. 8. species. element. distinct. platform Plate. differs. The. in. nodosed. denticles. of Epigondolella.. that. but. immature. the. to be and tend 2 of this paper.. from. part. MosHER.. primitia. from. growth on. anterior. of. more. The. Epigon-.

(11) Review. Some. of. Conodonts. Platform. Middle. the. of. ♪olygnathiformis (BuDUROV. Neogondolella. Pl. 1, Figs. Gondolella. BuDUROV. polygnathiformis. RAMOVS,. 1978,. Paragondolella. 58, 59,. p.. Figs.. 9-ll,. 12?,. 25, 27, 28 only;. (BuDUROV. and. 12, 13, 15, Pl.. 1979,. 1978, 16;. 1,. 90,. p.. 2,. Fig.. EICHER. in. at. third. Main. anterior denticle at. 8;. GoEL,. denticles. toward. broad or. and. shape. early. on. detailed. with. MosHER,. central. the. portion. near. sixth. and. end. in. end. posterior behind main. 15. in. morphotype morphotype. B. basal. posterior. One form,. and. and. posterior. It node-like,. two. or. node-like Keel. shallow.. and. to. tends. Wbicb. to. elliptical. and. in mature. form.. elliptical. form,. rectangular. of the. KRYSTYN. it into. (1980). resembles from communisti. A. morphotypes. he. B.. and. anterior. A,. communisti. which. is. by. Neogondolella is poorly. KRYSTYN. to. Metapoly-. assigned the. pit located. the. pュt. is. situated. to. be. based. in the near. communisti to. distinguish. feature. the external in their ranges. Metapolygnathus. gap. thought. to. by. it is difBcult. and. polygnathiformis. biostratigraphic. (1980) recognized. end. a. Metapolygnathus. Metapolygnathus. polygnathiformis. near. Neogondolella. communisti morphotype B, is not accompanied type. be. this. indicated. not. According. can. pit located. did. discriminated. also. this. Closely. However,. structure.. Neogondolella. from. in. form.. divided. a. posterior. 16 denticles,. anterior. mature. Pit. side.. immature. p.. denticle. marglnS to. form.. in. at. squared-off. younger. mature. denticle. lateral. inner. criterium.. in. Metapolygnathus. 164, Pl.. 1976,. RAFEK,. main. of lateral. in. distinct. and. elliptical. basis. B has. KRYSTYN. p.. height width and Faint irregular uP-turned.. posterior end, carries decreases in height toward. near. mature. and. end. Group,. in. tapers. side of anterior. Loop. in. rounded. margins. to. its. or. A morphotype communisti it is HAYAS甘I communisti of and characterized On of the the contrary, anterior portion unit.. posterior. Figs.ト6,. 1973,. rises. beside. (1980), Metapolygnathus gnathus. CATALov. 27, 28, 30, 34, 39,40;. first. and. compression. lateral. posterior. categorical. communisti. 16, 19,. Research. Pl. 1, Figs.. HAYASHI communisti :-"Metapolygnathus” BuDUROV Metapolygnathus (1977) distinguished. species.. Pl.. 939,. p.. Pl. 5, Figs.ト4;. Remarks. species. 1968,. Tambachitai. stage. and. posterior. low.. bifurcated. in. absent. inner. develope. may. extend. 1977,. unit. located. and. p.. 2.. Fig.. Pl. 15, Figs.. 110,. GupTA and and STEFANOV). Pl. 3, Figs. p. 1099, (20-23)?. on. at. indistinct. 109,. 12-17,. p. 736,. of. cre･nulation appears form. Carina extends highest. MosHER,. 7?;. and it elongated quadrangle with It abruptly form. or gradually. mature. anterior. alリ1979,. STEFANOV).. 1974,. (BuDUROV. It elliptlCal. form. margin. Fig.. and. Mos甘ER,. and. 1, Fig,. Pl.. third.. immature. 3-7;. 1,. 6.. Description:-Platform to. 1,. (BuDUROV. polygnathiformis 212,. Pl. 3, Figs.. Pl.. 7, 8, ll, 12, 15, 16, 22, 23, Pl.3,. Pl.. al., 1979,. et. 1973,. 118, 119,. p.. et. 101, Pl. 2, Figs. Figs.. 25. 5-7.. 7, 12;. Neogondolella. fourth. 2,. 1965,. STEFANOV).. KoIKE,. p.. in Japan. STEFANOV). and. DoNOFRIO and. 19;. Pl.. polygnathiformis. 20, Figs.. 211,. 14-17, 1976,. CLARK. Figs.. Metapolygnathus. Pl.. 13?,. BuDUROV,. BuDUROV,. 1;. Triassic. 1-28. STEFANOV,. and 3, Fig.. Pl.. polygnathiformis. 118,. Late. and. an. on. ancestral. polygnathiformis.. preserved. and. the. form The. aboral. of morphoholotype of view. of the.

(12) 26. KoIKE. T.. holotype. is obscure. HAYASHI's. in. illustration. in the basal鮎1d･ the plt is located where Metapolygnathus communisti of HAYASt=I A. morphotype. communisti collected. any. KRYSTYN's. specimens. morphotype. Carnian･. Therefore,. detailed. more. of Metapolygnathus. recognition Detailed RAMOVS. synonymies. Should. is. far,. the. to. determine. uncertain. whether. Metapolygnathus. to. present. A. narrowly. of. has. be. to. morphotype by EICⅢER. in. in. the. not. Japan.. uppermost. for. out. carried in. A. has. author. KRYSTYN. restricted. investigation. presented. is. referred. morphotype. communisti. were. be. So. to. referred A, however,. it. Therefore,. KRYSTYN･. of. it is difBcult. and. the. Japan. MosHER. and. (1974) and. (1978). Occurrence. Carnian.. :-Upper. Repository :-YNUC. 1293-1310.. Referenees Most. of references by KoIKE. paper. BENDER,. H･. (1970) der. 1ogie BuDUROV,. Geol.. Ann･. (1976). Soc.,. the. Trias. Die. II.. Helle'niques, gen･. et. Conodontenchr｡n｡.. 19, 465-540,. (Conodonta). n.. (1), 79-8l,. 1. Mitt.. der. von. Trias. des Ost_Balkans.. pl.. Structures,. taxonomy and of the Triassic evolution 6, (1), 13-20, 6 pls. Revision Triassic of the Late platform conodontsI. :. 5 pis.. (conodonta).. n.. sp.. 1 pl.. sp.. 36,. previous here.. omitted. mediterranen Gdol･ Pays. 21, 853-860,. Geol.. vere. triangularis. Paragondolellafoliata. Bulgarian. Gaol. der. Trias･. Bergbaustud･,. (1975) : Rev･. Gliederung. mediterranen (1972) : Ancyrogondolella. K･. GesI. Zur. :. in. presented. (1981). conodonts.. platform. Balcanica,. (1977). :. Ibid･. 7, (3), 31-48,. 5 pls. and STEFANOV, Ge'ol･ Bulgarie, CLARK,. D.L.. S.. (1965). MosHER,. and. development. Gondolella. der Trias. aus. (1966). conodont. 3 pls. Stratigraphic,. Bulgariens.. Tray.. 7, 115-127,. L.C.. the. of. Gattung. :. Pale'ont.,. Ser. :. Gondolella.. genus. Jour.. geographic Paleont.,. and. 40,. evolutionary. (2), 376-394,. 3. pls.. EICIIER,. D･. and. MosfiER,. L.. (4), 727-739, V･J･, KovACS,. 48, GupTA,. S･. (1968). Mountains, HucKRIEDE･. J･W･. lsozAKI,. Y. chert. T.. (1981) Univ･,. T.. 22, KovACS,. conodonts･. A.0.. :. T. in. the. Art･. 7,. (1980). Sinai. and. 22, der. 32, 141-175,. (1982). Palestine.. Ibid.,. Mino-Tamba 103-136,. microfossils 6, 582-593,. 5 pls.. Formation,. Ashio. Bull.. Trias. ihr stratigraphi･. und. from Geosci.,. bedded Osaka. pis.. of Triassic 25142, 2 pis. (28), from Conodonts the Skofja. KozuR,. i,.m. 4 pls.. conodonts and Late Triassic Southwest Japan. Jour.. Biostratigraphy Sec.. the Adoyama. of. (2), 63177, mediterranen. Belt, 5. Geol･,. 5 pls.. Middle. :. Triassic. Researches. in chert. Sci.,. Upper. :. Recent. conodonts. Conodonten. Z･,. MATSUDA,. 25,. from. conodonts. India･. Earth. Die. :. Pald'ont･. (1979)･ (2), 309-325,. S･ and. Permian. Japan.. (1958). Uniu.,. Nat. KoLAR,. The. :. sequences. City KoIKE,. and. S･ and ScHEFFER, Himalaya,. central. Wert.. scber. Triassic. :. Kumaun. northeastern. HAYASfII･. (1974). 2 pls.. in Japan.. conodonts. Sci. Rept.. Yokohama. II,. Loka. Limestone. of. Smarjetna. gora.. Gaol.,. 3 pls. H･. (1980). Indian･. :. Geol･. Some Assoc･･. remarks Recent. to Middle. Researches. and. Upper Geol･,. Triassic. platform 5 pls. 6, 541158l).

(13) Review. KozuR,. Some. of. H.. (1972). Die. :. Teil. Wert. graphischer H. MosTLER, and 1, (4), 1-19, L.. KRYSTYN, book. Abst.,. from. L.C.. (1968a). correlation. : Evolution. Islands.. M.. 21,. (1977). Range. and. N･L･. On. :. :. BITTER,. Middle. and. Columbia. Lower. Norian. of. microfacies. 6 pls･. Uppermost. Permian. and. West. Pakistan･. boundary Geol.. problems SI,ec. Publ.,. northern. conodonts. Prida. Triassic. Lower In. Permian. from. KuMMEL,. Triassic. and. Lime･. 7 pls･ Ge'ol. Pdnin･. Ann･. ･. conodonts B.. in Lower. Kalapani. 4, 259-295,. canyon.. uvac. Formation. Mirna. from. conodonts. Geol.,. the. 4, 207-275,. 2 pls･ Arctic. and. of the TEICHERT,. of West. Salt C･,. Pakistan.. 5 pls.. of Early conodonts (1977) : Neogondolelliform Roy･ Ontario Mus･, PaP･ Sci･ Occasional (29), Life. G･K･. MERRILL, and Pennsylvanian. :. the. and. from the conodonts 2 pls. (4), 55ト565,. Himalayan. Himalaya.. Ranges,. and. 4 pls･. 141-192,. 41, 28l-291,. TransIIndus. P.H.. and. Triassic. the. eds. Stratigrapbic Kansas Debt. univ. VON. 222,. (i), 47160, 3 pls･ Triassic (1974) : Middle. Johar, Kumaun. sule Balkanique, W.C. (1970). SWEET,. Carnian. Geologija,. and Malla. stone. s口DAR,. Upper. :. Europe. and. 6 pls･ Ibid･, 42, (4), 9471975, conodonts･. platform from British. Bull･,. conodonts. (4), 895-946,. Triassic (1965) : Middle Paleont., 39, Nevada. Jour.. CHEABRA,. A.. SAHNI,. conodonts Canada,. Surv.. Triassic. :. America. North. western. D.L.. of northwestern A. (1978) carniola.. 42,. Paleont.,. (1979). Guide･. region.. i pl･. from. conodonts. N･S･. HAILE･. and. (3), 7371746,. of Triassic. Triassic. CLARK,. and. 22,. Triassic. :. Geol.. M･B･. RAFEK,. Palaeont.,. (1968b) (1973) :. RAMOVS,. T.,. Jour.. their. Ibid･･. Trias･. in der. der Conodontenforschung. localities of the Salzkammergut conodont Symp., 61-98, 3 pls･ Euro少ean Conodont. Second. Sumatra.. MosHER,. ihr strati-. und. Triassic. :. KoIKE,. I.,. 1968. ihr. und. 7 pls･. (1),ト35･. Probleme. :. 1-37,. 2 pls･. (1980). METCALFE,. II･. (1971). 4,. 1968. (ll),. HAYAS臼I. 27. in Japan. HAYASHI 2,. Innsbruck,. Metapolygnathus. Ibid･,. Triassic. Late. and. Metapolygnathus Mitt･. Palb'ont･. Conodontengattung. Die. :. Geol･. Middle. of the. Conodontengattung. Wert･. stratigraphischer. (1974). Conodonts. Platform. age･. 1-10. WANG,. Z. sichuan. ZIEGLER,. W., sche. DAI,. and. J. (1981). province. ED.. (1973). Acta :. Verlagsbuchhandlung,. :. Triassic. PalaeoILt･. Catalogue 504. conodonts Sinica･ 20･. of conodonts･ pp･. from. the. Jiangyou･Beichuan. (2), 138-150, 3 pls･ E･ l･ Stuttgart･ vol･. area,. Schweizerbart-.

(14) Explanation Allfigures Figs.. 1-28. 25-27 Loc.. YNUC Figs.. 29-36. Zone, YNUC. Neogondolella from. 19;. Loc. Loc.. 22;. 22,. 24,. x70. Plate. of. for Figs.. except. polygnathiformis. (BuDUROV. 8, 14, 16-21,. from. 25. 23, 24. in nodosa. Zone;. 1 25, 26, 36,. Loc.. Loc.. 19. ×60. and. STEFANOV),ト5,. 24;. 6, 15 from. in mixed. Zone,. Loc. Taho. 7, 9-13, 25;. 28. 22,. from. Limestone,. 1293-1310. Epigondolella Kamura. 1311-1316.. primilia. Limestone;. MosHER,. 30, 33,. 34= from. 29, 31, 32, 35, 36 I,oc.. 25, nodosa. from. Polygnathiformis. Zone,. Tabo. Limestone,.

(15) T.. KoIKE. See.. II, Plate. i.

(16) Explanation Figs.. Figs.. Figs.. 1-10.. Neogondolella. from. Loc.. 24. Kamura. Limestone, Neogondolella. 19, 20, 22, 25 Kodiang, Figs.. 26-33. Tabo. Carinella. 2. 16-27,. 1 from. 32, 33, I.oc. 25;. Limesto早e;. Nakijin Formation, (BuDUROV), ll-18, mungoensis. Zone,. ×60 2, 5-9. Okinawa 23, 24 Kamura. from. Loc.. 22;. 10. Zone, 9olygnathiformis 1317-1324. Jima YNUC. 3 from. from. Bt. Kechil,. /Limestone;. 21. Malaysia; from. Bt.. 1325-1330.. navicula YNUC. Taho. Plate. the. foliata. Neogondolella Limestone,. (HAYASflI),. 4 from. YNUC. ×70, Figs.. Zone,. nodosa. from. Malaysia,. 28-31,. nodosa. in. ll-25.. 1-15,. of. (HucKRIEDE),. 133ト1335.. 26-33. from. Loc.. 30,. si?atulata Zone,.

(17) T.. KoIKE. See.. II, Plate. 2.

(18) T.. KoIKE. See.. w〆,L&を娘掛メ搬鮎､丸. &. II, Plate. 2.

(19) Explanation Figs. Figs.ト21. from. 1114,. E?igondolella Loc･31;. 16, 17 from. 8,12,20 Loc.. 28;. 20, 22-31, abneptis from. of. Piate. ×70, Figs.. (HucKRIEDE), Loc.. all localities. 26; in. 3 21,. 15-19, 1-3,. ×60. ll, 18, 19, 21. 9, 10, 13, 14 spatulata. 32-46,. Zone,. from Taho. Loc.. from. 27;. 15. Limestone,. 30;. Loc. from. 4-7. Loc.. YNUC. 29; 1336-. 1351. Figs.. 22-46.. Epigondolella. 43, 46. from. from. Loc.. Loc. 32;. 31;. Loc. (HAYASIII), 22, 44 from 28; spatulata 24, 25 from Loc. 33; 26-29, 34, 35, 37-39. all localities. in s少aiulata. Zone,. Taho. Limestone,. 23, 30-33メ36, from YNUC. Loc.. 30;. 1352-1366.. 4045.

(20) T.. KoIKE. See.. II, Plate. 3.

(21)