*
Palynomorphs from the Santonian Uge Member of the Taneichi Formation, Northeast Japan
Kiyoshi TAKAHASHI* and Ryozo SUCIYAMA **
(Received October 13,1989)
Abstract
The basal Uge Member of the Taneichi Formation consisting mainly of terrigenous sediments, viz. basal conglomerate, rhyolitic tuff, sandstones, coaly shales etc, was paly- nologically studied. A total of 303 species of palynomorphs which consist of 115 spores, 90gymnospermic pollen,3 gymnospem-angiosperm incertae sedis, 85 angiospermic pollen,
7 phytoplankton and 3incertae sedis were described and illustrated.
The following forms are new: Appendicisporites giganti/ormisn. sp., A. kanukaensis n. sp.,Baculatisporites giganticus n. sp., Balmeisporites nipponicus n. sp., Camarozono- sporites (Camarozonosporites) similisn. sp.,Cicatricosisporites minuticanaliculatusn. sp., C. senonicusn. sp.,Cingulatisporites iwatensisn. sp.,Foveosporitesper/ossusn. sp.,Gleiche- niidites verrucatusn. sp., Laevigatosporites longusn. sp.,L. nitidulusn. sp.,Leiotriletes gi- ganticusn. sp., Lycopodiacidites circularis n. sp., Lygodiidites tohokuensisn. sp.,Puncta- tisporites granulatus n. sp., Todisporites grandi/ormis n. sp., Toroisporis (Duplotoroi- sporis) triangulus n. sp., Trachysporites microverrucatus n. sp., Trilites pulchellus n. sp., T. pustulosus n. sp., Triplanosporites giganteus n. sp., T. rikuchuensis n. sp., T. taneichi- ensis n. sp., Uruhtlatisporites /lexuosus n. sp., Verrucatosporites verruculosusn. sp., Abies- pollenites minusn. sp., Alisporites enormis n. sp., Callialasporites ugensis n. sp., Cedri- pites sanrikuensis n. sp., Classopollis grandissimusn. sp., C. taneichiensis n. sp., Cycado- pites mirusn. sp., Ephedripites (Spiralipites) elongatus n. sp., lnaperturopollenites rugat- us n~ sp., Phyllocladidites globulosus n. sp., Piceapollis grandi/ormis n. sp., Pityosporites cretaceus n. sp., Podocarpidites senonicus n. sp., Rugubivesiculites japonicus n. sp., R.
sphaericusn. sp., Clavatipollenites variabilis n. sp., Cupuli/eroidaepollenites lanceolatus n. sp., Foveotricolpites /astidiosus n. sp., F. globosus n. sp., Foveotricolporites gloriosus n. sp., F. grandiformis n. sp., Ilexpollenites minus n. sp., Potamogetonacidites senonicus n. sp., Retitrescolpites pseudoazemae n. sp., Rousea elegantula n. sp., R. reticosa n. sp., R. triangulata n. sp., R. ugensis n. sp., Satishia pomposa n. sp., S. tri/ormis n. sp., S.
Department of Geology, Faculty of Liberal Arts, Nagasaki University, 1-14 Bunkyo- Cho, 852 Nagasaki, Japan.
** Morioka Daiichi Senior High School, Ueda 3 Chome 2-1, 020 Morioka, Japan.
uni/ormis n. sp., Symplocacites microreticulatus n. sp., Tricolpites ellipsoideus n. sp., T.
ovi/ormis n. sp., T. sphaeroides n. sp., and Tricolpopollenites baculatus n. sp.
Furthermore, new combinations are proposed: Appendicisporites auri/er Verbizkaja n. comb., A. cr. bellus Markova n. comb., A. macrorhyzus Maljavkina n. comb., A. cf.
pseudomacrorhyzus Markova n. comb., Ephedripites (Spiralipites) longus Song&Zheng n.
comb., E. (S.) perlatus Wang&Zhao n. comb., E. (S.) praeclarus Chlonova n. comb., Pityosporites alatipollenites Rouse n. comb., P. microsibiricus Zaklinskaja n. comb., P.
cf. pini/ormis Zaklinskaja n. comb., Ilexpollenites claviger Takahashi n. comb. and Tricol- pites rudis Takahashi n. comb.
The middle Okonai Member consists mostly of brown to greenish gray sandstone with Crassostrea fossil bank in the lower part and fine sandstone which yields Sphenoceramus sanrikuensis Matsumoto &Sugiyama together with other fossils in the upper part.
Formerly the Taneichi Formation was considered as the Neogene,but later revised by Terui et al. (1975) to the middle Upper Cretaceous (Santonian) on the evidence of ammono- ids and inoceramid. The Uge Member resembles lithologically the basal Tamagawa For- mation of the Kuji Group. Crassostrea fossil bank in the lower horizon of the Okonai Member is closely similar to that of the Tamagawa Foramation. Accordingly, the Uge Member and the lower part of the Okonai Member are correlated with the Tamagawa Formation. The upper part of the Okonai Member is like to the Kunitan Formation of the Kuji Group in whichInoceramus (Platyceramus) japonicus Nagao & Matsumoto occurs in yieldingSphenoceramus sanrikuensis Matsumoto&Sugiyama which is an effective mem- ber of thePlatyceramus japonicus zone and indicates the lowest Campanian in age.
The Santonian Uge playnoflora is characterized by the following spores and pollen grains: Aequitriradites verrucosus, Appendicisporites spp., Balmeisporites nipponicus, Camarozonosporites spp., Cicatricosisporites spp., Cyathidites spp., Gleicheniidites seno- nicus, Jimboisporites senonicus, Lygodiidites spp., Patellasporites spp., Trilites spp., Zlivi- sporis novomexicanus, Araucariacites australis, Callialasporites ugensis, Classopollis spp., Cupressacites spp., Ephedripites spp., Phyllocladidites spp.. Pristinuspollenites microsac- cus, Rugubivesiculites spp., Vitreisporites pallidus, Clavatipollenites variabilis, Astero- pollis clavatus, Callistopollenites radiatostriatus, Fibulapollis spp., Rousea spp., Satishia spp., and Tricolpites spp.
Contents
Introduction ··· .. ···135 Stratigraphic and palaeontologie notes of the Taneichi Formation ···135
Materials and method 138
Palynologic assemblage·· 140
Palynomorphs from the Uge Member · ·.. ·· ·..· ·.. ·147
Spores · ·.. ·· .. · ·· .. ·.. ··147
Gymnospermic pollen· .. ·· .. ·· .. ·· .. ·· .. ·.. ·.. · ·.. · ·· .. ·.. ·.. ·.. ·.. ···· ·.. · · 151 Gymnosperm-angiosperm incertae sedis ·.. ·..·· .. ·· ·· .. ·.... ·.. ·.. ·.. ·· .. ·· ·.. ·.. ·· 154
Angiospermic pollen 154
Phytoplankton 157
Incertae sedis 157
Systematic description 157
Spores ·.. ··· .. ·· ·.. 157
Gymnospermic pollen·· .. ·.. · .. ·.. ·.. ··· ..··· ·· .. · ·· .. ··· .. ·· .. ·.. · .. ···· .. ··· .. ·.. ··· .. ·.. 234
Gymnosperm-angiosperm incertae sedis 296
Angiospermic pollen 299
Phytoplankton 351
Incertae sedis 355
References 356
Introduction
The Taneichi Formation, outcropping in a long and narrow belt area along Rikuchu Coast in northeastern Honshu, consists predominantly of sandstones of marine facies in middle and upper horizons and coaly shales-sandstones of non-marine facies in lower horizon. The rocks of the middle horizon contain some macrofossils, marine faunas and silicified woods, by contrast the lower yield many microfossils, spores and pollen grains, including some microphytoplankton. The abundant spore-pollen contents from the lower horizon are described here with the purpose that they will play an important role in constructing the Upper Cretaceous palynobiostratigraphy of Japan and be useful in determining the age.
Miki (1972) described many well preserved palynomorphs from the Kuji Group in the vicinity of Kuji city, being situated in south ca. 20 km of Taneichi town. These palynomorphs are compared with those of the Taneichi For- mation. The spore-pollen data of Santonian sediments of Japan have been published only from the Futaba Group [Miki, 1972 ; Takahashi 1973 (971), 1988J and the Kuji Group (Tokunaga& Takase, 1968; Miki, 1972).
Stratigraphic and palaeontologie notes of the Taneichi Formation
The Taneichi Formaion, lying unconformably on the Lower Cretaceous granite, consists of the basal Uge Member, the middle Okonai Member, and the upper Yagi Member (Sugiyama, 1982, 1983; Matsumoto & Sugiyama, 1985, 1986). This is composed predominantly of marine and non-marine sediments yielding macro- and microfossils. The basal Uge Member consists predomi-
nantly of terrigeous sediments, viz. basal conglomerate, rhyolitic tuff, sand- stone, coaly shales or sandstones etc. and abounds in carbonaceous matter on the whole. The basal conglomerate consists mostly of insufficiently round- ed cobbles of granite, hornfels, chert etc., less than 20 cm in diameter and is ca. 2 m in thickness. A bluish gray rhyolitic tuff (ca. 1 m in thickness) on the basal conglomerate is pursued without difficulty in all the areas in which the Taneichi Formation is distributed. Moreover, in upper horizon than the tuff
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Text-fig. 1. Situation and geologic map of the Taneichi Formation entered localities eX) and numbers of the collected samples.
there are coaly shales or sandstones and sandstones with closs-laminae. All the samples studied palynologically were provided from these coaly shales or sandstones. Sugiyama (1982) illustrated and described preliminarily some palynomorphs obtained from these rocks.
The Okonai Member (ca. 140 m in maximum thickness) consists mostly of brown to greenish gray sandstone with Crassostreafossil banks in the lower part and fine sandstone which yields a new inoceramid, Sphenoceramus san-
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rikuensis Matsumoto & Sugiyama (1985, 1986), together with other bivalvia, shark teeth, silicified woods, amber, trace fossils a sedimentary environment of shallow sea near land is expected. Many silicified woods yield in the fossil banks of the upper part of the Member. Sugiyama (1982) disriminated already the following species of the silicified woods: Pityoxylon spp., Araucarioxylon kiiense Ogura, Cupressinoxylon vectense Barber, Taxodioxylon albertense Penhallow, a tree fern which was newly named as Tempskya iwatensis Nishi- da (1986).
The uppermost Yagi Member consists predominantly of a massive sand- stone, ca. 25 m in thickness, only in the Yagi area and almost is continuous under the surface of the sea.
The Taneichi Formation was formerly considered as the Neogene, but later revised by Terui et al. (1975) to the middle Upper Cretaceous (Urakawa- n, K6 -Santonian) on the evidence of ammonoids [Polyptychoceras cf. subun- datum (Yokoyama) etc. ] and inoceramid(Inoceramus naumanni Yokoyama).
This is approximately correlated with the Upper Cretaceous Kuji Group in south ca. 20 km of Taneichi, and the Okonai Member resembles generally the Kunitan Formation, middle part of the Kuji Group, in which Inoceramus
(Platyceramus) japonicus Nagao et Matsumoto occurs among others.
Recently, Toshimitsu (1988) suggested that theSphenoceramus sanrikuensis- S. cristatus-Inoceramus (Cordiceramus) kanmerai Subzone occupies the main part of the Platyceramus japonicus Zone which indicates the lowest Camp- anian age. Therefore, the Uge Member and the lower part of the Okonai Member with the Crassostrea fossil bank are correlated with the Tamagawa Formation of the Kuji Group.
Materials and method
All the samples were collected by one of the authors, Sugiyama, from several localities along Rikuchi Coast of north Iwate Prefecture, as follows, with their relative positions and horizons shown in text-figs. 1-3.
Sample no.! slide no. locality
C 31 a-I south of Kanuka
C 33 a-k north of Uge station (A)
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C 36 a-f north of Uge station (B)
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cliff near a private house, north of Uge station north of Uge station
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A : Uge harbor (south of Uge)
B : North of Uge station (Uge-Okonai) C : Yagi-Shukunohe
D : South of Kanuka
a : conglomerate; b : sandstone; c : tuff; d : coal or coaly shale;
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They were relatively abundant in sprre-pollen contents except some sam- ples. One of the authors, Takahashi, examined several strewn slides, which were prepared by Sugiyama, under the Nikon Apophot microscope with Plan and Apo objectives and studies several specimens using a JEOLCO JSM T200 scanning electron microscope (SEM).
All the slides containg specimens studied are kept in the Department of Geology, Faculty of Liberal Arts, Nagasaki University.
Palynologic assemblage
The total assemblage of identified and unidentified palynomorphs from 9 samples of the Uge Member amounts to 303 form-species, namely 115 spores (ca. 38%),90 gymnospermic pollen (ca. 30%), 3 gymnospem-angiosperm incertae sedis (ca. 1 %), 85 angiospermic pollen (28%), 7 phytoplankton (2. 3
%) and 3 incertae sedis (ca. 1 %). Within this palynoflora about 47%043 species) could be referred to previously described palynomorphs mainly from Europe, Japan, Siberia, North America, Australia and New Zealand. Although the Taneichi Formation is distributing in the area not far from Kuji city in where the Kuji Group is developed and Miki (972) described and illustrated 102 palynomorphs from the Tamagawa and Sawayama Formations of the Kuji Group, 71 species (about 23 %) were newly named. Many forms (ap- proximately 28 %) which were either very infrequently recorded within the present assemblage or in an imperfect state of preservation, had yet to be excluded from identification below generic level.
Tab. 1 Species composition of the Uge palynoflora.
i Gymnosperm-
I Gymnospermic Angiospermic Incertae
:Pteridophyte
pollen angiosperm
pollen Phytoplankton
sedis Total
! (? )
Number of
. 115(37.9") 90(29.7") 3(0.99") 85(28") 7(2.3") 3(0.99") 303 species I
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0 36 (11.9") (0.99")
0 143
cribed species 5 6 - - 4 8 - - 3 - -
(48.7") (53.3") (42.3") (42.8")
New species (10.2") (5.3") (0.33") (7.6")
0 71
3 1 - - 1 6 - 1 - - 2 3 - · 0
(27") (17.8") (33.3") (27")
• (" fortotalnumber of species) upper row (" for number of species in each section) •.• lowerroW
1) Pteridophyte
Among the trilete spores, the following species occurred frequently or abundantly: Appendicisporites distocarinatus Dettmann & Playford, A.
giganticus n. sp., A. kanukaensis n. sp., A. taneichianus n. sp., Camarozono- sporites (Camarozonosporites) similis n. sp., C. (Hamulatisporis) hamulatis Krutzsch, Cicatricosisporites minuticanaliculatus n. sp., C. senonicus n. sp., Cyathidites australis Couper, C. minorCouper, Deltoidospora diaphana Wilson
&Webster, Dictyophyllidites harrisii Couper, Gleicheniidites senonicus Ross, Leiotriletes giganticus n. sp., Monoleiotriletes gracilis Krutzsch, M. grand- issimusn. sp.,Patellasporites polyverrucifern. sp., P. verrucatusn. sp., Toroi- sporis (Duplotoroisporis) triangulus n. sp., Trachysporites microverru- catus n. sp., Trilites pulchellus n. sp., T. pustulosus n. sp., and Zlivisporis novomexicanus (Anderson) Leffingwell.
Several trilete spores which are morphologically remarkable make splen- didly the Uge palynoflora: Aequitriradites verrucosus(Cookson& Dettmann) Cookson & Dettmann, Appendicisporites spp., Balmeisporites nipponicus n.
sp., Camarozonosporites spp., Cicatricosisporitesspp., Jimboisporites senoni- cusMiki, Lycopodiacidites circularis n. sp., Lygodiidites spp., Patellasporites spp., Trachysporites microverrucatus n. sp.,Trilites spp. and Zlivisporis novo- mexicanus(Anderson) Leffingwell.
With respect to the monolete spores, Laevigatosporites dehiscens Taka- hashi and L. nitidulus n. sp. appeared frequently.
Palynomorphs from the Uge Member which were formerly recorded in sediments of Europe, Japan, North America, Australia etc. vary no doubt in their stratigraphic distribution. There are several species (e. g. Aequitrirad- ites verrucosus, Cyathidites australis etc.) which appeared for the first time during the Jurassic or the Lower Cretaceous and cover all the Upper Cretaceous stages whereas others (e. g. Deltoidospora nodaensis, Jimboisporites senonicus etc.) reveal a much more restricted range in the Upper Cretaceous (Tab. 2 ).
Almost 66% of the dispersed spores of the Uge Member can be associated with recent spore families, in some cases even with the genera: Athyriaceae (Athyrium), Cyatheaceae(Cyathea), Dipteridaceae (Dictyophyllum), Gleiche- niaceae (Gleichenia), Hymenophyllaceae (?), Lycopodiaceae (Lycopodium), Osmundaceae (Osmunda, Todites) Polypodiaceae, Schizaeaceae ( Anemia, Mohria, Lygodium), and SelaginellaceaeCSelaginella).
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I I I I
Vitreisporites Araucariacites Cedripites medius
Cedripites microsaccoides Inaperturopollenites dubius Araucariacites australis
Podocarpidites bifo~is
Ephedripites (E.) chaloneri Sciadopityspollenites antiquus Psophosphaera pseudotsugoides Cupressacites cU8pidataefo~is
Ephedripites (S.) ellipsoideus Inaperturopollenites parvus Pityosporites siegburgensis Pityosporites alifo~is
Phylloeladidites ovatus
Inaperturopollenites laevigatus Pityosporites scopulipites 1
Ephedripites (E.) regularis Ephedripites (D.) scabridus Ephedripites (E.) notensis Ephedripites (S.) longus Phyllocladidites mawsonii Podocarpidites ellipticus Ephedripites (S.) praeclarus Ephedripites (S.) perlatus Psophosphaera aggereloides
2) Gymnospermic pollen
The gymnospermic pollen assemblage of the Uge Member include some morphologcially characteristic forms: Alisporitesspp. (Pinaceae), Araucari- acites spp. (Araucariaceae), Callialasporites ugensis n. sp. (Araucariaceae or Podocarpaceae), Classopollis spp., (Pagiophyllumor Brachyphyllum), Phyllocladidites spp. (Podocarpaceae, Phyllocladus), Pristinuspollenites microsaccus(Couper) B. D. Tschudy, Rugubivesiculitesspp. (Podocarpaceae), and Vitreisporites pallidus (Reissinger) Nilsson (Caytoniales, Caytonanthus).
Disaccate conifer pollen are Pinaceae(Abiespollenites, Alisporites, Cedri- pites, Piceapollis, Pityosporites), Podocarpaceae(Phyllocladidites, Podocarp- idites, Rugubiuesiculites) , and Caytoniales (Vetreisporites). Non-saccate conifer pollen consist of Araucariaceae (Araucariacites, Callialasporites), Taxodiaceae-Cupressaceae(Cupressacites, Inaperturopollenites, Sciadopitys- pollenites, Sequoiapollenites) and Pinaceae(Psophosphaera).
Monosulcate and polyplicate pollen forms of the Cycadaceae and Ephed- raceae are a minority (about 24% of species number) of the gymnospermic pollen group of the Uge Member.
Many gymnospermic pollen range from the Jurassic or Lower Cretaceo- us to Tertiary or Upper Cretaceous. 4 species, Ephedripites (E.) chaloneri Brenner, E. (E.) regularis Hoeken-Klinkenberg, E. (D.) scabridus Song &
Zheng, and Phyllocladidites ovatus Takahashi, reveal a much more restricted range which does not cross the Santonian age (Tab. 3).
3) Gymnosperm-angiosperm incertae sedis
Clavatipollenites variabilis n. sp. and 2 species ofClavainaperturiteswere distinguished. Clauatipollenites uariabilis n. sp. occurred abundantly from the Uge Member and resembles closely Clavatipollenites tenellus Phillips&
Felix (1972) from the Albian of Lousisiana and Kansas (U.S.A.). The genus Clavatipollenites possesses a sulcus-like furrow and clavate sculpture.
Therefore, this pollen provides both gymnospermic and angiospermic charac- teristics.
4) Angiospermic pollen
The angiospermous pollen grains from the Uge Member include 85 species, but the ratios of abundances are not so high.
The following species are remarkable in respect of their morphological features: Atriopollis cf. indivisus Agasie, Asteropollis clauatus (Phillips &
Felix) Ward, Callistopollenites radiatostriatus (Mtchedlishivili) Srivastava,
Fibulapollis enodatus (Chlonova) Takahashi,Fibulapollis evanidus(Chlonova) Takahashi, Foveotricolpites spp., Foveotricolporites spp., Phimopollenites pannosus (Dettman & Palyford) Dettmann, Rousea spp., Satishia spp., Symplocacites micropunctatus n. sp. and S. microreticulatus n. sp.
Not only the monocolpate but monoporate pollen groups appear rarely.
Only three pollen grains of potamogetonaceous plant were found. The tricolpa te and tricolporate pollen groups include many genera and species which are of almost Japanese and European types and much lesser North American or Australian ones, and in which 22 new species are mentioned. Two tricolpate pollen genera with heterobrochate sculpture, Rousea Srivastava (1969) and Satishia Ward (1986), were distinguished from the genus Tricolpites with homobrochate sculpture.
Asteropollis clavatus (Phillips& Felix,1972) Ward (1986) with a triradiate sulcus is reported so far from Albian to lower Cenomanian of U.S.A. and Au- stralia and Callistopollenites radiatostriatus (Mtchedlishivili, 1961) Srivastava (1969) is hitherto a Maastrichtian type from Siberia, Japan, and Canada.
In a systematic arrangement the dispersed angiospermous pollen grains except unknown botanical affinity can be related to the following plant fami- lies:
Monocotyledoneae: Potamogetonaceae, Gramineae, Palmae, ? Liliaceae.
Dicotyledoneae: Cyrillaceae, Santalaceae or Loranthaceae, Chlorantha- ceae (?), Aquifoliaceae, Nyssaceae, Fagaceae, Oleaceae, Salicaceae, Jugland- aceae, Symplcaceae (?), Hamamelidaceae.
5) Phytoplankton
Some phytoplankton, a dinoflagellate cyst, 3 Pterospermataceae, and 3 acritarchs, were found rarely from the Uge Member. The authors considered that the Uge Member is influenced by a non-marine environment of sedimenta- tion, because it abounds in coaly matters and yields no marine fossil. How- ever, the above-mentioned phytoplankton show clearly their marine influence.
Two species of Pterospermella range from the Lower Cretaceous to Pa- laeogene i~ appearance and Cymatiosphaera reticulosa occurs from the Oli- gocene to Pleistocene.
Miki (1972) described and illustrated 102 palynomorphs from the Tamagawa and Sawayama Formations of the Kuji Group being situated in south ca. 20 km of Taneichi town.
The Santonian Tamagawa palynoflora is closely similar to the lower
Campanian Sawayama palynoflora except some palynomorphs which are not common to each Formation: e. g. Balmeisporites minutus, Cyathidites austr- alis, Deltoidospora nodaensis, Uveaesporites simplex, Jimboisporites kujiensis, Schizosporis scabratus, Foveosporites sawayamensis, Azonia(al. Ocellipollis) obliquus etc.
15 species of all palynomorphs from the Kuji Group are common to the Uge palynoflora, namely Gleicheniidites senonicus, Cicatricosisporites austra- liensis, C. dorogensis, Cyathidites australis, Deltoidospora cascadensis, D.
psilostoma, D. nodaensis, Jimboisporites senonicus, Vitreisporites pallidus, Araucaracites australis, A.· limbatus, Monocolpopollenites kyushuensis, Arecipites pflugii, Tricolpites vulgaris, and Fibulapollis evanidus.
After all, a similarity of the Uge palynoflora to the Kuji palynoflora is not so strong. This fact is indicated by 71 new species in the Uge palynoflora.
Miki (1972) reported more than 120 palynomorphs from the Coniacian and Santonian Futaba Group. 15 species of them appear commonly in the Uge Member: Todisporites minor, Cicatricosisporites dorogensis, C. australiensis, Cyathidites minor, Deltoidospora nodaensis, D. cascadensis, Jimboisporites senonicus, Vitreisporites pallidus, Araucariacites australis, A. limbatus, Cupu- liferoidaepollenites ditis, Tricolpites rudis, Monocolpopollenites kyushuensis and Arecipites pflugii.
Takahashi (1973, 1988) reported and described 115 palynomorphs from the Futaba Group and 30 species of them are common to the Uge palynoflora:
Deltoidospora psilostoma, Cyathidites australis, C. minor, Triplanosporites minutulus, Monoleiotriletes gracilis, Camarozonsporites hamulatis, Cicatrico- sisporites australiensis, Laevigatosporites dehiscens, L. senonicus,L.ovoideus, L. prominens, Inaperturopollenites dubius, 1. laevigatus, 1. parvus, Psopho- sphaera pseudotsugoides, Pityosporites aliformis, P. siegburgensis, P. scopu- lipites, P. microinsignis, Phyllocladidites mawsonii, P. ovatus, Vitreisporites pallidus, Ephedripites (S.) ellipsoideus, Monocolpopollenites kyushuensis, Cup- uliferoidaepollenites fallax, C. ditis, Tricolpites retiformis, Cyrillaceaepollenites minor and Rhoipites minus.
From the above-mentioned comparision between the Uge and Kuji (or Futaba) palynofloras the authors have to regard the Uge palynoflora as a representative palynoflora of Japan inthe Santonian stage.
In conclusion, many spores and pollen grains occurred in the Uge Member, have respectively each long range in appearance and only a few ones with restricted range are effective to palynostratigraphy (see Tab. 2 and 3).
Palynomorphs from the Uge Member Spores:
( 1) Aequitriradites verrucosus (Cookson& Dettmann) Cookson&
Dettmann (pI. 30, fig. 7)
( 2) ? Aequitriraditessp. (pI. 35, fig. 2)
( 3) Appendicisporites aurifer Verbizkaja n. comb. (pI. 41, figs. 3a - b;
pI. 45, fig. 3)
( 4) Appendicisporites cf. bellus Markova n. comb. (pI. 34, fig. 3)
( 5) Appendicisporites distocarinatus Dettmann& Playford (pI. 36, figs.
2a - b; pI. 37, figs. 2a - b; pI. 38, figs. 2a - b; pI. 42, figs. 4a - b; pI.
46, fig. 3)
( 6) Appendicisporites exilioides (Maljavkina) Takahashi (pI. 35, fig. 4) ( 7) Appendicisporites gigantiformis n. sp. (pI. 36, figs. la - b; pI. 37, figs.
la - b; pI. 39, figs. la - b; pI. 43, fig. 3(cf.))
( 8) Appendicisporites kanukaensis n. sp. (pI. 40, figs. 3-4 ; pI. 41, figs.
la-b; pI. 42, figs. 1-2; pI. 43, figs. 1-2; pI. 44, figs. 2a-b; pI. 46, figs. 1, 3)
( 9) Appendicisporites macrorhyzus Maljavkina n. comb. (pI. 45, fig. 2) (10) Appendicisporites cf. pseudomacrorhyzus Markova n. comb. (pI. 35,
figs. 3a - b)
(11) Appendicisporites rarius n. sp. (pI. 38, figs. la - b; pI. 45, figs. la- b)
(12) Appendicisporites sellingii Pocock (pI. 41, fig. 2)
(13) Appendicisporites taneichianus n. sp. (pI. 39, figs. 2a -d; pI. 40, figs.
1-2; pI. 44, figs. 1, 3-4; pI. 46, figs. 4-5) (14) Appendicisporites sp. (pI. 41, figs. 4a - b)
(15) Baculatisporites giganticus n. sp. (pI. 22, figs. 3-4)
(16) Balmeisporites nipponicus n. sp. (pI. 32, figs. 5-6; pI. 33, figs. 1-4;
pI. 34, figs. la - b; pI. 35, figs. la-b) (17) ?Balmeisporites sp. (pI. 34, fig. 2)
(18) Biretisporites incrassatus Takahashi& Shimono (pI. 11, fig. 4)
(19) Camarozonosporites (Camarozonosporites) similis n. sp. (pI. 28, figs.
5-7; pI. 29, figs. 1-4; pI. 30, figs. 1-2)
(20) Camarozonosporites (C.) semilevis Krutzsch (pI. 30, fig. 4)
(21) Camarozonosporites (Hamulatisporis) hamulatis Krutzsch (pI. 29, figs.
5-8; pI. 30, fig. 5)
(22) Camarozonosporites (H.) insignis Norris (pI. 30, fig. 3)
(23) Camarozonosporites (H.) sp. (pI. 28, fig. 4)
(24) Cardioangulina trichacantha Maljavkina (pI. 4, fig. 7; pI. 7, figs. 1- 2)
(25) Cibotiiditessp. (pI. 24, figs. 2a - b)
(26) Cicatricosisporites australiensis(Cookson) Potonie (pI. 46, fig. 6) (27) Cicatricosisporites brevilaesuratus Couper emend. Kemp (pI. 43, figs.
4a-b)
(28) Cicatricosisporites dorogensis Potonie& Gelletich (pI. 45, fig. 5) (29) Cicatricosisporites cf.halleiDelcourt& Sprumont (pI. 45, fig. 4) (30) Cicatricosisporites minuticanaliculatus n. sp. (pI. 47, figs. 3 - 4; pI.
48, fig. 1; pI. 49, figs. 2-3)
(31) Cicatricosisporites pseudotertiarius Krutzsch (pI. 42, fig. 3)
(32) Cicatricosisporites senonicusn. sp. (pI. 47, figs. 2,5; pI. 48, figs. 2- 3; pI. 49, fig. 1)
(33) Cicatricosisporites subrotundus Brenner (pI. 47, figs. la-b) (34) Cingulatisporites iwatensis n. sp. (pI. 23, figs. 2-3)
(35) Clavatisporites sp.(pi. 23, figs. 7a - b)
(36) Cyathidites australis Couper (pI. 8, figs. 6-7; pI. 9, figs. 1-2,5) (37) Cyathidites minor Couper (pI. 8, figs. 8-10; pI. 9, figs. 3-4.6) (38) Cyathidites splendens Harris (pI. 2, fig. 1)
(39) Deltoidospora cascadensis Miner (pI. 4, fig. 2)
(40) Deltoidospora diaphana Wilson&Webster (pI. 4, fig. 5(?); pI. 7, fig.
3; pI. 10, figs. 2-3)
(41) Deltoidospora psilostoma Rouse (pI. 4, figs. 3-4) (42) Deltoidospora nodaensis Miki (pI. 10, fig. 4)
(43) Densoisporites cf. microrugulatusBrenner (pI. 25, fig. 6)
(44) Dictyophyllidites harrisii Couper (pI. 9, figs. 7-9; pI. 10, figs. 7-8) (45) Endoculeosporacf. delicata Burger (pI. 24, fig. 1)
(46) Extrapunctatospora /ayumensis Takahashi&Jux (pI. 53, fig. 2) (47) Extrapunctatospora microalveolatus Krutzsch (pI. 49, fig. 4) (48) Extrapunctatospora sp. (pI. 51, fig. 7)
(49) Foveosporites per/ossus n. sp.(pI. 28, figs. 2-3) (50) Foveosporites sp. (pI. 27, figs. 4a - b)
(51) Foveotriletes cf. scrobiculatus(Ross ex Weyland& Krieger) Potonie (pI. 28, fig. 1)
(52) Gleicheniidites cf. con/ossus Hedlund (pI. 14, fig. 3)
(53) Gleicheniidites senonicus Ross (pI. 12, figs. 8-10; pI. 13, figs. 1-10;
pI. 14, figs. 1- 2)
(54) Gleicheniidites verrucatus n. sp. (pI. 23, figs. la - b, 5a - b) (55) Ischyosporites sp. (pI. 27, fig. 3)
(56) Jimboisporites senonicus Miki (pI. 21, figs. 3a -c; pI. 22, figs. 1- 2) (57) Laevigatosporites dehiscens Takahashi (pI. 49, figs. 5-11; pI. 51, figs.
8-9; pI. 52, figs. 1-4)
(58) Laevigatosporites longus n. sp. (pI. 50, figs. 8-9)
(59) Laevigatosporites nitidulus n. sp. (pI. 50, figs. 4-7; pI. 51, figs. 1-3) (60) Laevigatosporites ovoideus Takahashi (pI. 48, fig. 7; pI. 52, fig. 7) (61) Laevigatosporites probatusTakahashi (pI. 50, fig. 3; pI. 51, fig. 4) (62) Laevigatosporites prominens Takahashi (pI. 50, figs. 1- 2; pI. 52, figs.
5-6)
(63) Laevigatosporites senonicusTakahashi (pI. 48, figs. 4, 6; pI. 51, fig.
6)
(64) Laevigatosporitessp. (pI. 53, fig. 1)
(65) Latosporites rotundus Takahashi&Jux (pI. 48, fig.5 ; pI. 51, fig. 5) (66) Leiotriletes cf. convexiformisChlonova (pI. 1, figs. 6a - b; pI. 3, fig.
6)
(67) Leiotriletes giganticus n. sp. (pI. 1, figs. 1-3; pI. 2, figs. 2-4) (68) Leiotriletes maxoides Krutzsch maximus (Pflug) Krutzsch (pI. 4, fig.
1)
(69) Leiotriletes rotundiformis(Maljavkina) Chlonova (pI. 1, figs. 4-5;
pI. 2, fig. 5(cf.))
(70) Leiotriletes wolffi Krutzsch wolffi (pI. 3, fig. 4(cf.); pI. 10, fig. 1) (71) ?Leiotriletes sp. (pI. 11, fig. 2)
(72) Leptolepidites sp. (pI. 23, fig. 4)
(73) Lycopodiacidites circularis n. sp. (pI. 26, figs. 6a - b; pI. 30, figs. 6a- b)
(74) Lygodiidites lal;vigatus Pocock (pI. 32, fig. 4)
(75) Lygodiidites tohokuensis n. sp. (pI. 31, figs. 1-2; pI. 32, figs. 1-3) (76) Monoleiotriletes gracilis Krutzsch (pI. 2, figs. 6a - b; pI. 3, fig. 7; pI.
5, figs. 3-5; pI. 10, fig. 5)
(77) Monoleiotriletes grandissimus n. sp. (pI. 4, fig. 6; pI. 5, figs. 1- 2;
pI. 6, fig. 1; pI. 10, fig. 6)
(78) Monoleiotriletes minimus Krutzsch (pI. 8, figs. 1-2)
(79) Patellasporites polyverrucifer n. sp. (pI. 19, figs. 2-5; pI. 20, figs. 1- 4; pI. 21, figs. la - b)
(80) Patellasporites verrucatus n. sp. (pI. 15, figs. 4-5; pI. 18, figs. 4-5;
pI. 21, figs. 2a - b)
