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Volume 1988 (1988)
- Issue 152 Pages 603-
- Issue 151 Pages 501-
- Issue 150 Pages 435-
- Issue 149 Pages 361-
Volume 1988, Issue 149
Displaying 1-5 of 5 articles from this issue
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TOMOKI KASE1988 Volume 1988 Issue 149 Pages 361-370
Published: April 30, 1988
Released on J-STAGE: May 25, 2010
JOURNAL FREE ACCESSSix Early Carboniferous (Visean) gastropods are described from a sandstone bed of the Hikoroichi Formation exposed in the Onimaru Quarry of Ofunato City, the Kitakami Mountains, northeast Japan. This is the first report of Carboniferous gastropods from the Kitakami Mountains. Kawanamia is proposed as a new genus of the family Lophospiridae. The species described herein are Straparollus (Euomphalus) asanoi, n. sp., S. (E.) sp., Kawanamia onimarensis, n. sp., Baylea yvanii (Leveille), Littorinides sp., and Pseudozygopleura (Stephanozyga) nishimurai, n. sp. The occurrence of these gastropods suggests Visean age and supports the previous age assignment of the sandstone bed exposed in the Onimaru Quarry.View full abstractDownload PDF (1877K) -
SHUJI NIKO, NOBUO IKEBE1988 Volume 1988 Issue 149 Pages 371-377
Published: April 30, 1988
Released on J-STAGE: May 25, 2010
JOURNAL FREE ACCESSA single specimen of Middle Ordovician receptaculitid from the Josen Supergroup of North Korea was previously called as Receptaculites coreanicus Ikebe (nom. nud.) by Ikebe in 1939. We reinvestigated the specimen, and found that it was a new species of the genus Fisherites, F. coreanicus Niko and Ikebe on account of having relatively large thallus and asymmetrical intercalary meroms.View full abstractDownload PDF (1286K) -
TATSURO MATSUMOTO, AKITO ASAI, HIROMICHI HIRANO, MASAYUKI NODA1988 Volume 1988 Issue 149 Pages 378-395
Published: April 30, 1988
Released on J-STAGE: May 25, 2010
JOURNAL FREE ACCESSThis is Part III of the serial descriptions of inoceramid species from the Cenomanian of Japan. In this part we describe the following three species which occur commonly not only in the Pacific areas of the USSR (Pergament, 1966) but also in Hokkaido. (1) Inoceramus pennatulus Pergament. As the specific name indicates, this species is characterized by a well developed posterior wing. For some reasons Pergament presented sufficient examples of the left valve but few of the right. This is supplemented by the specimens from Hokkaido. I. pennatulus occurs in both the Upper and Middle Cenomanian. (2) I. reduncus Pergament. Several examples of this species have been acquired from the Upper Cenomanian of Hokkaido. In addition, there are deficient specimens which are comparable with this species. If they are taken into consideration, the species may range down to the middle part of the Cenomanian. A question remains that I. reduncus Pergament, 1966 may be a junior synonym of I. korjakensis Terechova, 1965. (3) I. ginterensis Pergament. In addition to the original specimens from the Pacific areas of USSR, typical examples have been reported from the Upper. Cenomanian of the Interior Province of the U.S.A. This species occurs also fairly commonly in the Middle to Upper Cenomanian of Hokkaido. Although there is some extent of variation, no marked distinctions have been noticed between examples of different provinces or stratigraphic positions.View full abstractDownload PDF (6574K) -
MASAKI MATSUKAWA1988 Volume 1988 Issue 149 Pages 396-416
Published: April 30, 1988
Released on J-STAGE: May 25, 2010
JOURNAL FREE ACCESSSix species belonging to five genera of Barremian ammonites are described from the Ishido Formation of the Sanchu Terrane in the Kwanto Mountains. They are : Calliphylloceras sp., Karsteniceras asiaticum (Yabe et Shimizu), K. obatai Matsukawa, Heteroceras (Argvethites) sp., Barremites (Barremites) strettostoma, and Valdedorsella (Puezalpella) sp. The ammonite fauna of the Ishido Formation (the Ishido fauna) is made up essentially of two groups of ammonites, the smooth or weakly ornate normaly coiled forms and various heteromorphs, a characteristic feature of the Barremian ammonite faunas generally in the Tethyan realm. The Ishido fauna shows a high similarity to that of the Mediterranean region of the Tethyan realm, and contains also one species, Simbirskites (Milanowskia) sp., which migrated from the northeast European province in the European-Boreal region through the Arctic epicontinental sea.View full abstractDownload PDF (3516K) -
KEIJI MATSUOKA1988 Volume 1988 Issue 149 Pages 417-429
Published: April 30, 1988
Released on J-STAGE: May 25, 2010
JOURNAL FREE ACCESSThe following six species of freshwater bivalves are described from the Pliocene Iga Formation in the Ueno Basin, central Japan : Lamprotula (Sinolamprotula) sp. A, L. (Parunio) sp. B, L. sp., Cuneopsis (Cuneopsis) gracilenta, n. sp., C. (Procuneopsis) okuyamai, n. sp., and C. (Tchangsinaia) praemaxima, n. sp. These unionid species of the genera Lamprotula and Cuneopsis become extinct in the Japanese Islands in Recent times, but they are still living in China. These bivalves are the only record of this age known from the Japanese Islands.View full abstractDownload PDF (2785K)
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