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1 October 2015 Thylacocephala (Arthropoda) from the Lower Triassic of the South Kitakami Belt, Northeast Japan
Masayuki Ehiro, Osamu Sasaki, Harumasa Kano, Jun Nemoto, Hisayoshi Kato
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Abstract

A thylacocephalan fauna from the upper Olenekian (Lower Triassic) Osawa Formation in the South Kitakami Belt, Northeast Japan, is described. The fauna comprises three species belonging to three genera: Ankitokazocaris bandoi Ehiro and Kato sp. nov., Kitakamicaris utatsuensis Ehiro and Kato gen. et sp. nov., and Ostenocaris sp. This is the first report of fossils belonging to the class Thylacocephala from Japan, and it expands their paleogeographic distribution. As almost all genera of Thylacocephala inhabited low-latitude areas in each relevant geological time, their occurrence from the Osawa Formation supports previous opinions that the South Kitakami Belt was located in the equatorial region during the Triassic.

© by the Palaeontological Society of Japan
Masayuki Ehiro, Osamu Sasaki, Harumasa Kano, Jun Nemoto, and Hisayoshi Kato "Thylacocephala (Arthropoda) from the Lower Triassic of the South Kitakami Belt, Northeast Japan," Paleontological Research 19(4), 269-282, (1 October 2015). https://doi.org/10.2517/2015PR010
Received: 13 November 2014; Accepted: 1 March 2015; Published: 1 October 2015
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