FIRST RECORD OF THE CIRRIPEDE GENUSSTRAMENTUM(THORACICA, SCALPELLIFORMES) FROM THE UPPER CRETACEOUS OF JAPAN

Autor:	Gengo Tanaka, Shin Ichi Nomura, Shigeo Harada, Haruyoshi Maeda
Rok vydání:	2009
Předmět:	Geographic distribution Paleontology biology Genus Thoracica biology.organism_classification Ecology Evolution Behavior and Systematics Cretaceous Geology
Zdroj:	Palaeontology. 52:849-855
ISSN:	1475-4983 0031-0239
DOI:	10.1111/j.1475-4983.2009.00885.x
Popis:	The scalpelliform genus Stramentum is described from upper Turonian-Coniacian (Upper Cretaceous) strata in the Mikasa area, Hokkaido (Japan), documenting the first record of the genus from the north-west Pacific Realm. The single articulated skeleton, which is horizontally embedded in a dark grey laminated mudstone, is specifically indetermi- nate because capitular plates are missing. However, peduncu- lar morphology resembles that of S. (S.) pulchellum (Sowerby Jr), which has been described from the Cenomanian-Turo- nian of Europe. The present record from Japan demonstrates that this cirripede genus had a wider geographic distribution than previously assumed during the youngest phase of its radiation.
Databáze:	OpenAIRE
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