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106 T. SIiIKAMA

(

･F

System _and Evolution _of Japanese ^Fulgorarid ^Gastropoda ¹⁰⁷

0riginal Description: "Shell long, slender; splre and aperture about

equal in height; entire surface ^ornamented by丘ne reticulate sculpturing

overlying ll to 14 sinuous transverse ribs which tend to disappear ^on the

body _whorl. Aperture spindle‑shaped; ^inner ^lip covered ^by ^a ^regular ^ovaレ

shaped callus which ^is ^thickest posteriorly･ Canal and outer lip missing ^on all ^specimens. Dimensions of holotype (medium _sized shell lacking canal and

apex) ^; ^height ^95mm; ^diameter, ^37.5mm; ^of ^largest ^paratype ^with ^apex ^and

canal missing; ､beight, 119.3mm; diameter, 55･5mm･

Remarks: Shell relatively large sized with highsplre and medium ^sized protoconch. Probably丘ve postnuclear

band absent and shoulder angulated.

line, ^coarser than in indurata, and striations. Columella _plaits _unknown.

wborls ^and ^suture ^deep. ^Subsutural Axial ribs running oblique ^to ^suture

there are developed numerous radial

This species has ^been confused with indurata, and may have some relationships ^with striata ^or densicostata･

Geological Horizon: The Blakely formation ; upper Oligocene･

Musashia

(Miopleiona)

scowensis (DuRHAM,

1944)

アメリカヒタチオビ(節)

1944. MioPleiona scowensis DuRHAM. Univ･ Calif･ Pub･ Bull･ Dept･ Geol･ Sci･･ _vol･

29, no. 5, _pp. 177, 178, pl. 19,丘g. 15.

Holotype: MPUC ^no. 35419.

original Description: ^〟 Shell apparently long; fusiform; large; similar ^to M. weaveri TEGLAND, axial ribs 16 ^or 17 ⁱⁿ number, retractive ^for ^a short distance ^from the suture, then protractive ;splral ornamentatioJI Of penultimate whorl consists ^of about 14丘ne ribs ^with interspaces twice ^as wide; ^at ^times the secondary splral ribs ^approach ^the ^prlmarries ⁱⁿ ^strength; the intersec‑

tion of growth lines with these ribs ^glVeS ^a reticulate appearance; suture abutting, profile of whorl gradually rounded from sutur.e･

Remarks.･

Althoughthe

^holotype ^is ^very fragmental, this species with its obsolete axial ribs is _unique among the species of Miopleiona, and in this

point it comes nearer to striata･ Protoconch, number of postnuclear ^whorls and columella plaits ^unknown. Subsutural ^band absent･

Geological Horizon : Turritella porterensis ^zone ^{in the} Marrowstone shale of the upper Lincoln formation; upper Oligocene･

Musashia

(Musashia)

^hirasei ^(SowERBY, ¹⁹¹²⁾ ニクイロヒタチオビ(Pl･ 15,丘g･11)

Loc. °it.

1960. Fulgoraria aff･ hirasei (SowERBY), ^MACNEIL. ^Geol. Surv･､Prof･ PapリnO･ 339, p. 97, _pl. 14,丘g. 13.

1962. Fulgoraria (Psephaea) cancellata koyuensis S8UTO. Mem･ Fac･ Sci･ Kyushu Univ. ser. D, _vol1 12, no･ 1, pp･ ^66, 67, pl･ ll, figs･ ^3, ^6?

･textfig･ 12,

108 T. SHIKAMA

IReferred

^Specimens: ^USNM ⁵⁶²⁹⁶⁶ ^reported ^by ^MACNEIL ^from ^the ^Chinen

sand bed _at Loc. 17481

(Hesbikiya),

Okinawa‑Honto, Okinawal). GK‑L 6182

(holotype),

⁶¹⁸¹ collected by T. SⅢuTO from the middle Tsuma formation at

Tsuma bridge, YamasumiJSaito City, Miyazaki Prefecture2). Two fragmental shells

(GIYU)

collected

‑

by Y. SATOYOStII from the Kokozura formation at

lzura, Otsu‑machi, Kitaibaraki City, Ibaraki Prefecture (Pl. 15,丘g. ll)3). A shell

(GIYU)

collected by S. SEKIGUCHI from the Tamari ^bed ⁱⁿ Kakegawa

area, Shizuoka Frefecture4).

Remarks: ^A shell ^from Izura ^here illustrated crrries three whorls has eminent axial ribs and ^numerous radial striations, cancellated with each other, and ^one very weak columella plait. MACNEIL's specimen is a very fragmental splreL with medium sized protoconch, and SHUTO'st cancellafa ^koyuensis ^{is also} based on fragmental _splre With ^one columella plait. The specimen from the Tamari bed is ^a last whorl.

Geological Horizons: The Kokozura ^or Takaku formation; late Miocene, F3‑G. The Tamari bed; latest Miocene, G. The Tsuma ^formation; late Miocene, G. The Chinen sand bed; earliest Pleistocene, Ⅰ.

Musashia

(Musashia)

cancellata

(KuRODA

^& ^HABE,

1950)

チリメソヒタチオビ(Pl. ^{12,丘gs･25,} 26)

Loc. °it.

1962･ Fulgoraria (Psephaea) cancellata ^KuRODA ^& HABE, SHUTO･ MerD･ Fac･ Sci･

Kyushu UnivリSer. D, vol. 12, ^no. 1, _pp, 65, 66, Pl. 12,丘gs. 1, 2, 8.

Referred

SPecimeTLS:

.GK‑L‑6176‑6178 collected by T. MATSUMOTO et all from the､ lowerLTakanabe ^formation at Hagenoshita, Uwae, Takanabe‑machi, Koyu‑gun, Miyazaki Prefectures) and ^a cliffat ^the ^entrance of the ^gorge 600m south of T6riyama, Kawaminami‑machi, Koyu‑gun, Miyazaki Prefectures).

GK‑L 7199‑80 collected by T. SHUTO from the ^same localities. A shell (GIYU) collected ^by M･ KuNIKAT阜 from the Takanabe formation at ^a point ^lkm

south of Takanabe. Railway Station, Takanabe‑machi, Koyu‑gun, Miyazaki

Prefecture7).

Remarks: The shell collected by KuNIKATA

(Pl.

^12,figs. ^25, ²⁶⁾ ^is ^rela‑

tively well ⁱⁿ preservation, with 丘ve postnuclear whorls, 86.2mm ^high; ^a, 66.8mm; ^b, 18.6mm; c, 32.1mm; b/a, 0.28; c/a, ^0.48. ^There ^are 17axialribs in penultimate whorl and subsutural band distinct.

GeologlCal Horizon: the lower Takanabe formation; early pliocene, H.

1) 2) 3) 4) 5) 6) 7)

沖縄本島平敷屋宮崎県西都市山角妻橋

茨城県市大津町五浦静岡県満水

宮崎県児湯郡高鍋町上江冗の下同郡川南町通山

同郡高鍋町高鍋駅南方

System and ^Evolution of Japanese Fulgorarid Gastropoda log

Musashia

(Musashia)

^sp. aff. noguchii (HAYASHI, 1960) ノダチヒタチオビ(Pl･ ^ll,丘gs･ 3,4)

Loc. °it.

Referred

SPecimen: A Sakahata bed _at Sakahata,

Remarks:

̲The shell ^is

a little eroded. There are

Two columella plaits ⁱⁿ weak. This species may by unangqlated shoulder

GeologLCal Horizon :

Pliocene, H2.

shell

(GIYU)

collected by the writer from the Kazusa‑macbi, Kimitsu‑gun, Chiba Prefecturel).

54･6mm.high, fusiform _and the surface of ^splre 4･5 postnuclear whorls and ^protoconch eroded.

last whorl ^are ratller ^Weak. ^Axial ribs few.and be identi丘ed with noguchii

thougha

little different and very smooth surface.

The Sakahata bed of the middle ^Seki

‑Groug,･ late

Musashia

(Musashia)

smithii

(SowERBY,

1901)

ウスヒタチオビ Loc. °it.

Referred､s♪ecimen:

^A ^fragment of spire (GIYU) _collected by Y. MATSU‑

s=IMA from the Hasumi bed at Hosono, Kazusa‑machi,Kimitsu‑gun, Chiba

Prefecture2).

Remarks: The splre has four whorls and large protoconch. Surface of whorl ^rather 且at

though

^there ^are moderately developed axial ribs and

numerous radial striations･ Sutural ^area stepped･

GeologlCal Horizon: The Hasumi bed of ^upper Seki Group; late Pliocene, H2.

Mus?shia

(Musashia)

totomiensis (MAKIYAMA,

1927)

マキヤマヒタチオビ(新) (Pl･^12,丘gs･ 1,2)

1927･ Fulgoraria totomiensis MAKIYAMA･ Mem･ Coll･ Sci. Kyoto Imp. Univ., ser. B,

￣^{γol. 1,} ^no. ^1, ^art. ^1,^p. ^77, ^pl. ^3,丘gs. ^{17, 18.}

Holotype: MAKIYAMA's no･ 303 in the lnst. Geol. Min. Kyoto Univ., col‑

lected from Tennoyama3).

OrigL‑nal Description: ‥A species closely allied ^to PsePhaea _concinna BRODERIP･ Whorls roundly shouldered; the slope ^a little concave, its beigbt about onethird of ^the whorl ^{; the} surface below the angle nearly vertical, ^very slightly constracted ^at ^the ^suture･ Body‑whorl lightly convex, very little

conctracted below･ Sculpture consisting 13 axial plicate ^costae ^crossed by many splral threads; the axials formlng elongate nodules ^on the angle of

1 2 3

千葉県君津郡上総町坂畑千葉県君津郡上駄町細野掛川市天王山

110 T. SHIKAMA

the body whor), diminishing towards the base; the interspaces wide and concave; the splrals like those of P. hirasei SowERBY, ^a little more than 40 in the penultimate ^whorl, subequal, broader than the intervened grooves, running all ^over the surface of ^the ^later ^whorls. ^Aperture rather ^narrow, slightly canaliculated ^at ^the ^upper ^angle, truncated ^at ^the base･ Outer lip thickened and rounded, slightly expanded above, thinner ^near the base.

Columelは subvertical, ^with ^one oblique plait. Inner lip thin, spreading broadly over the body whorl, with ^an arcked free edge･ Height of ^the body whorl, 40mm; diameter, 24mm.

Rdferred

SPecimens.･ ^A _shell

(GIYU)

collected by S･ SEKIGUCHI from the Tamari bed at ^a road‑cutt血g nortb､west of

Anyoji,

^Kakegawa ^City, ^Shizuoka

Prefecturel)･ A.fragment of last whorl (GIYU) _collected by S･ SEKIGUCIil from the Tenno sand bed at Higasbi Middle School, Kakegawa City2).

Remarks: This species is closely allied ^to noguchii

thoughshoulder

^is

more angulated, axial rilbs ^are less ⁱⁿ number and surface is more smooth･

The pattern of columella plait coincides ^with that of noguchii‑clara ^group,

that is f.F or F. The shell from ^ApyoJl ^is 54.3mm

highas

^preserved and

with ^three whorls. There ^are 13占Ⅹi卑I_ribs ⁱⁿ penultimate whorl. Subsutural band is absent.

Geological Horizons: The Tamari bed; late Miocene, G･ The Tenno sand bed of the Kakegawa Group; middle Pliocene, Hl̲2.

Musashia (Musashia) hyugaensis

(SHUTO,

¹⁹⁶²⁾ ヒユウガヒタチオビ(新)

1962. Fulgoraria (PsePhaea) ^hyugaensis ^SHUTO. ^Mem･ ^Fac･ ^Sci･ ^Kyushu ^univ･, ^ser･

D, _vol. 12, no. 1, pp. 68, 69, _pl. 12,figs. 3, 4, 6, pl. 13,丘g･ 2･

HolotyPe ^:

grey silt bed Prefectures).

ParatyPe ^: 4652

(deformed

･Immature shell (GK‑L 6183) _collected by T. SHUTO from the at Hagenoshita, Uwae, Takanabe‑machi, Koyu‑gun, Miyazaki GK‑L 6184 from the ^same locality mentioned above･ GK‑L

shell)collected ^by T. SEUTO from the silty sandstone ^on the roadside, 300m north of Kushiki bridge, Kusiki, Kamihokita, Saito Sity, Miyazaki Prefecture4).

original Description: ^'E ^The shell is moderately small in size and fusiform

with the acute splre and ^the long base･ The test is moderately thick but

not solid. The protoconch is smooth, globular, and consists of ^about ^two ^to two and ^a half volutions, of which tbe丘rst is very oblique, small, and ^cup‑

shaped tip, the second ^islarge and globose, and ^the remainder ^is subcylindrical･

1) 2) 3) 4)

静岡県掛川市安着寺北西

掛川市東中学

宮崎県児蕩郡高鍋町上江冗の下宮崎県西都市上穂北串木

Systcm _and Evolution of Japanese ^Fulgorarid ^Gastropoda lil They are separated ^one another ^by the shallowly impressed suture and the lateral boundary between the protoconcb and the post‑embryoni‑c whorl is _not

sharp but rather gradual･ The post‑embryonic whorls ^are about four in

number ^at ^the adult ^stage; ^they ^are roundly angulated ^at ^the upper third of the splre Whorl ^and ^the shoulder ^is ^concave below the obsolete subsutural band ; the surface below the angulation is slightly ^convex and slightly receding.

The body whorl ^is large and ^gradually contracted ^below ^to the snout. The surface of ^the whorl ^is ornamented by the axial

･folds which ^are ^sharp and

strong at the angulation･ ^once weakened upward ^at the ^concave part of

the shoulder and again distinct _at the subsutural band showing rather the granulose appe?rance; they also weakened gradually downward to the lower

suture and disappear on the 1)asal surface ^of the body whorl. The axial

folds keep their sharpness and ^strength ^at ^the periphery of ^the body whorl.

The axial folds keep their sharpness and disappear ^on the basal surface ^of the body whorl ^except ^for the latest _part of the body

,whorl where they

are somewhat weakened･ They ^are somewhat ^narrower than the interspaces

and numbered ^fourteen to丘fteen ^on ^the splre Whorls･ ^The ^aperture is ^long, rather ^narrow, occupylng more than ^half of the shell height, bluntly pointed at the posterior end, and gradually contracted anteriorly･ The _outer lip ^is sharp, almost vertical, and simple･ The ^inner lip ^is slightly oblique at the

partial part and ^has ^one distinct splral plait ^at ^the lower _part of the columella

lip･ The _callus is thin ^but sharply margined. The canal ^is moderate in

length･ widely ^open･ and ^truncated ^at the end･ The splral sculpture i畠not developed except for the numerous minute lines, which ^cross ^over the axials.

Holotype･

Height‥

^21･1 ^mm, Diameter ^‥

8,6hlm,

^Numbers of nucleoconch: 2.25, Numbers of nuclear whorls: 3, axial ^ribs: 15, col‑umellar plait: 1.‑

Remarks: ^As SHUTO _gave an elaborately detail･ed description, this especi.es is characterized by small size, large sized protoconch, four postnuclear whorls,

one columella plait in last _whorl, _very angulated shoulder, ^smooth surface without radial striations and ^strong･ radial ribs･ Although an undeformed adult specimen ^is not fully known, t‑be writer thinks that this species ^is related closest ^to totomiensis ⁱⁿ construction ^and ^pattern･ of shells.

GeologlCal Horizons: The upper Kawabaru formation and the lower Takanabe formation ;middle Miocene and Mio‑pliocene ; F呂‑Hl.

Musashia (Musashia)

nagaoi

(HAT阜I

^MS),

,SHII革AMA, ∩SP. nQV.

ナガオヒタチオビ(節) (Pl･13,丘gs･‑9‑12)

Holotype: IGPS cat･ no･ 72689 frorp the.PoroTlai formation _at the entrance of ^a valley ^east of Mayachi, Yubari City, Hokkaido.

(Pl.

^13,丘gs. ^9, 10).1'

Referred

^SPecimen: ^UTCM reported by YoKOYAMA aS Voluta megaspira 1)北海道夕張市真谷地東方の谷

112 官. SI寸IKAMA

from the Makubetsu coal ^mine, Tokacbi, Hakkaido

(Pl.

^13,丘gs. ^ll, ^12)･1)

Diagnosis: Shell medium sized, fusiform, relativery thin, and has small protoconch and four postnuclear ^wborls･ Spire relativery ^low and last whorl eminently developed and in且ated･ Subsutural band obsolete and ^suture ^not deep･ Axial _ribs absent and ^there ^are developed numerous axial striations, which ^rum ^rather oblique ^to ^suture above sboulder･ Surface of whorls rather smooth ^and ^without radial striations. Inner lip broad and columella plaits unknown. Aperture large sized･ an､d ^outer lip tolerabley ^convex outward･

shoulder _not angulated but gently curved and middle ^portion of last whorl vaulted. Holotype: 115mm bigb and 452mm wide,

b/a:

22･1/85･8‑0･26,

c/a:

45.2/85.8‑0.53.

Remarks: This species looks rather like smithi ⁱⁿ general ^outline･

eminently developed last _whorl, _rather smooth whorl ^surfaces, broad inner lip and shallow sutural ^area, but ^is clearly different by the･ absence of axial ribs and radial striations. In this respect, this species is _very unlqne among the Japanese fulgorarids. Holotype ^is welトpreserved, ￣but UTCM ^is broken in apex and columella tip; it ^is 69mm high as preserved ^and 38mm wide in last whorl.

GeologlCal Horizon: The Poronai formation _; Oligo‑Miocene, D‑E.

Musashia

(Musashia?)

^kannoi ^sp. ^nov.

カソノヒタチオピ(Pl･ 14,丘gs･7,8)

1960. Fulgoraria (PsePhaea)striata (YoK.), ^KANNO (pars). Tert. ^Syst. ^Chichibu

Basin, _pt. 2, pp. 376, 377, pl. 49,丘g. 13.

Holotype: TUB‑G‑5670, illustrated by KANNO from the Nenokami bed at Loc. 206, ^a mountainside cliff, about 300m east of ^the waterfall ^at Nenokami, Hikok払bo, Yoshida‑machi, Chichibu‑gtLn, Saitama Prefecture2).

Referred

^SPecimens: ^IGPS ^cat..no. ^85595, ^collected ^by ^lsHII ^from ^the

Takamizo silt bed ⁱⁿ Kimitsu‑gun, Chiba Prefecture. ^A shell (GIYU) _collected by S. YAMASHITA from the Kaisekizan bed at K6zabara, Misato‑mura, ^Age‑

gun, Mie Prefecture･3)

Diagnosis.･ Shell medium sized,

high

^spired, vaulted and with large

protoconch and four postnuclear whorls･ Last whorl ^large ^and eminently

in且ated. Shoulder not angulathe but gently curved. Subsutural ^band absent.

Axial ribs ^strong and ^numerous, about 25 in penultimate whorl, and ^crossed by distinct axial striations･ Columella plaits ^unknown but they ^are probably

two and weak, F.F ^on last whorl.

Remarks: This shecies is rather related with tokunagai ^or miensis, ^but is distinguished ^by more inflated ^last whorl and different _number of post‑

1)北海道十勝募別炭坑 2)埼玉県秩父郡吉田町彦窪子ノ神 3)三重県安芸郡美里村高座原

Systern and Evolution of Japanese Fulgorarid Gastropoda 113

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Text丘g･ 17･ Restoration of M･ (Musashia?)

kahnoi _sp. nov.on the _specimen from K6zabara, Mie Prefecture.

A

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