〜
LL
)
ll
J J
′ /
′ /
′ ′
//′
′ l l
‑
1 J
/ ∫
∫ /
/ / / / /
Textflg. 9. Fulgoraria
(PsePhaea) matsuurensis sp･
novりreStOred, × 1.
1) 2) 3) 4) 5)
北九州市若松区島郷脇田 芦屋町岩屋
宮崎県児湯郡西都市三納山路 佐賀県西松浦郡有田町応法 佐世俸港嘱浦島
01igo‑Miocene, D. The upper Kawabaru for‑
mation, middle Miocene.
Fulgoraria
(PsePhaea)
matsuurensis sp. nov.マツウラヒタチオビ(節) (Pl･17,丘g･4)
19281 Fulgoraria (PsePhaea) sp. b NAGAO. S°i.
Rep. T6hoku lmp.口nivリ Ser. 2, γol. 12,
no. 1, p. 118, pl. 17,丘gs. 34, 34a, 34b, 35.
19281 Fulgoraria (?) (PsePhaea?) sp. c NAGAO.
Sci. Rep. T6hoku Imp. Univ., ser. 2, vol. 12,
no. 1, p. 118, pl. 17,丘gs. 27, 27a.
Holoty♪e: IGPS cat. no. 36106, reported by NAGAO aS F. (P.)sp. b from the Kishima bed
人
at Obo, Arita‑macbi, Nisbimatsuura‑gun, Saga Prefecture.4) (Pl.17,丘g.
4).
Referred
SPecimen: IGPS cat. no. 36105,reported by NAGAO aS F. (P.?) sp. c from the ltanoura bed on the south coast of Kakinoura lsland, Sasebo Harbour.5)
Diagnosis: Shell fusiform, thick and stout.
Spire rather low and protoconcb medium sized.
Axial ribs few, eleven in penultimate whorl and strong. Surface of whorl smooth and without
System and Evolution of Japanese Fulgorarid Gastropoda 89
radial striations. Shoulder not angulated but gently curved. Columella plaits unobserved. Subsutural band absent. Probably 5 volutions of teleoconch.
Remarks: With the smooth surface, strong and few axial ribs, absence
of subsutural band, tllick shell and general outline, this species may be near concinna group.
GeologLCal IIorizon: The kishima formation and ltanoura bed, lower part of
Nishisonogiformations
; late Oligocene or Oligo‑Miocene, C‑D.Fulgoraria (Psephaea) masudae HAYASAKA, 1958 マスダヒタチオビ(節) Pl･ 16, figs1 4, 5)
1958. Fulgoraria.masudae HAYASAKA. Saito Ho10n Kai Saito Grat. Found., no. 27, pp. 24‑27, pl. 3,丘gs, 1a‑b, 2, 3.
1961, Fulgoraria masudae HAYASAKA. Geol. Guide Neighbourhood Kanazawa, pl.
1,丘g.5.
1965. Fulgoraria masudae HAYASAKA, KASENO 良 MATSUURA. S°i.Rep｡ Ran. Univ., vol. 10, no. 1, pl. 4,丘gs｡ 12, 13.
Holotype.･ DGS.i= reg. no. 3647 from the Hamada bed in the left
cliff of Chikagawa River, about 200m from the sea shore, at Chikagawa, Tanabe‑
machi, Shimokita‑gun, Aomori Prefecture.】)
Original Description: "Shell large, medium in thickness. Protoconch consisting of one and a half whorls, smooth and rather small. Whorl ex‑
tremely high spired, posトnuclear whorls six, apical angle about 35o. Cons‑
triction at the suture is rather weak･ Suture is provid､ed with a band of callus on the last 3 wborls･ Surface rough in appearance, with neトwork of fine longitudinal laminae and weak splral striae closely arranged dn the shouト der area
and the base･ Sculpture consisting of rather distinct axial plicae
on the earler four and a half postnuclear volutions, number of plicae 12, 12, 12 and 14 on the lst, 2nd, 3rd and 4th whorls respectively; irregular and disappearing on the succeeding whorls and on the early part of the nrst volution･ Surface of the last one‑fourth of the body whorl is
strongly wrinkled with irregular interspaces covered by丘ne longitudinal laminae･ Peripheral part nearly straight and long･ Aperture a little more than half the length of the shell ;the outer lip somewhat thickened, substraight in the middle, slightly re且ected on the posterior part, inner lip broadly callused. Columella with 丘ve rather strong plaits arranged with somewhat irregular intervals, anterior
one much broader and more rounded than the others, closely‑set by twos.
Height 168.Omm, diameter 54.2, beigbt of aperture 89.0.
Remarks: As the relationship of this species wasfully discussed by HAYASAKA, it is situated between magma‑preuostiana group and kaneko.
Althoughthe
columella plaits of last whorl are丘ve, like those of kaneko, theyare much weaker than the latter･ Columella formula is 3･3･3･4･5 belonglng
* Department of Geology, Miyagi University of Education,
1)青森県下北郡田名部町近川
90 T. SfHKAMA
to βpattern, and on the last columella the pattern of plaits is f.F.F‑f‑F
or f.F.F.F‑F. Ontogenetic developeent of plait formula is f.F.F, f.F.F, F.F‑
F, F.F.F‑F, F.F.F‑i‑F. The spire is very high, b/a is 0.47, coming near kaneko hayashii, k. h.itoi or daviesi, but in Nipponomelon group as angulosa or elongata it is also very
high(0.50‑0.52).
Surface sculpture, subsutural band and axial ribs are rather similar to those of magma.Referred
SPecimens: DGS reg. no. 3648(paratype)
; young specimen fromthe same locality as the bolotype. Three shells
(GIYU)
collected by T. YAMA‑GUCIil from a river cliffof Chikagawa River, 200m from the river mouth (Pl.
16, figs. 4,5). A shell stored in the Geological lnstitute, Kanazawa University collected from the Omma bed at Maki, south of Kanazawa City.1) A shell
(G‑IYU) collected by M. IctIIKAWA from the Omma bed at Yuhidera, Kanazawa City.2)
Geological Horizons: The Hamada bed; Pliocene. The Ommabed; lower Pliocene, Hl.
Fulgoraria (PsePhaea) excelsa sp. nov.
アツヒタチオビ(新) (Pl･11,丘gs･9, 10)
Holotype: A shell
(GIYU)
collected by S･ NAKANE from the Imaizumi sandstone bed(‑Nojima
bed) at lriya, Kamakura City･3)Diagnosis: Shell small sized, very thick, with 4.5 postnuclear whorls and small sized protoconch, which carries nucleas situated on the posterior side ip front view. Spire relatively low and whorls much in且ated. Subsutural band moderately developed, Columella plaits rather many and d占istinct,its
formtlla
is 4.5･5･5 (f･f･F･F, f･f･F･f‑F, f･f･F･f‑F, f.f･F･f‑F),belonging
to∈
pattern; in last vborl, anterior columella plaits strong and separated from the succedding plaitsI Axial ribs very strong, keel‑like and 16 in penultimate
whorl. There are seen axial striations but not radial ones. Holotype is
56.1mm high as preserved; columella tip is broken; a: 44.0±mm; b: 17･2mm;
c: 23.6mm;
b/a:
0.39; c/a: 0.54.Remqrks: This species is rather related in general outline to Musashia
(Nipponomelon)
preuostiana but is clearly distinguished from the latter bynulnerOuS COlumella plaits and very thick sbell･ In this respect, this species
belongs to PsePhaea
althoughit
is close to Nipponomelon group･Geological Horizon.･ I The
Nojima
bed of the middle Miura Group; middle Pliocene, Hl̲2.1) 2) 3)
金沢市牧 金沢市夕日寺 鎌倉市入谷
System and Evolution of Japanese Fulgorarid Gastropoda 91
Fulgoraria (PsePhaea?) tessellata sp. nov.
モリシマヒタチオビ(新) (Pl,16,丘gs. 7‑10)
Holotype: NSMT*‑P‑5451 collected by T. MoRISHIMA from the lower Oguchi bed at sea coast of Kusbimoto‑machi, Nishi‑
muro‑gun, Wakay争ma Prefecturel) (Pl.16,丘gs. 7, 8).
Referred
SPecimen: GK‑L 6275 collected by T.SHUTO from the Ashiya formation ;1.tthe sea Coast 750m west of Cape Yawata, Wakita, Wakamatsu‑ku,
kitakyushu City.2)
Diagnosis: Shell medium sized, slender and with gently curved shoulder. Surface of whorl smooth
and with numerous radial striations across axial
striations, hence surface is且nely tessellated. Spire and columella plaits unknown; shell probably fusi‑
form with moderately high splre. Subsutural band and axial rib absent.
Remarks: NSMT‑P‑5451 is 87.5mm high as
preseryed and 45.3 and 38.4mm in diameters of last
whorl. GK‑L 6275 is 75.7mm high as preserved and
44.8and 41.1mm in diameters of last whorl. In the
･absence of axial ribs this species may be close to sinziensis, but much differs from the latter in general outline and tessellated surface. By the last charac‑
teristic it may be closer to daviesi, but its true subgeneric position is undetermined until better specimens are obtained.
.Fj
j･‑‑.
∫̲iI
I
l I