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Article: Late Jurassic decapod crustaceans from northeast Japan

Publication: Palaeontology
Volume: 53
Part: 4
Publication Date: July 2010
Page(s): 761 770
Author(s): Hisayoshi Kato, Toshinobu Takahashi and Muneo Taira
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How to Cite

KATO, H., TAKAHASHI, T., TAIRA, M. 2010. Late Jurassic decapod crustaceans from northeast Japan. Palaeontology53, 4, 761–770.

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Astacidean and thalassinidean macrurans (Glyphea sp., ?Eryma sp. and Protaxius sp.) and a new longodromitid crab, Planoprosopon kashimaensis, are recorded from the Upper Jurassic (upper Kimmeridgian to lower Tithonian) of Fukushima Prefecture, northeast Japan. Material was collected from the Tatenosawa Sandstone Member of the Nakanosawa Formation, Somanakamura Group, from which abundant Tethyan-type marine invertebrates are known. Planoprosopon kashimaensis sp. nov. closely resembles P. heydeni (von Meyer), a common form in the Upper Jurassic of the Tethyan realm in Europe, and represents the oldest record of a brachyuran from the circum-Pacific region. Similarities to contemporaneous decapod assemblages in southern Germany indicate that closely comparable, parallel decapod faunas in the Tethyan realm, inclusive of brachyurans, had already been established in the western circum-Pacific region by the Late Jurassic.
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