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1 April 2018 Late Devonian Brachiopods from Choanji, South Kitakami Belt, Japan, and Their Stratigraphic Significance
Jun-Ichi Tazawa
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Abstract

Late Devonian brachiopods from Choanji, South Kitakami Belt, northeastern Japan, are re-examined to determine their age. Two brachiopod assemblages are recognized in the Choanji area. The assemblage from locality CHJ2 in the middle part of the Choanji Formation consists of one species, Desquamatia (Seratrypa) sp., which indicates a Frasnian age. The assemblage from locality CHJ1 in the upper part of the Choanji Formation consists of 13 species in 10 genera, including a new species, Parallelora minatoi sp. nov., and is of late Famennian age. Thus, the Choanji Formation is correlated with the Upper Devonian (Frasnian–upper Famennian), although until quite recently it was considered to be the lowest Carboniferous (Tournaisian) in Japan.

© by the Palaeontological Society of Japan
Jun-Ichi Tazawa "Late Devonian Brachiopods from Choanji, South Kitakami Belt, Japan, and Their Stratigraphic Significance," Paleontological Research 22(2), 129-144, (1 April 2018). https://doi.org/10.2517/2017PR015
Received: 29 April 2017; Accepted: 4 August 2017; Published: 1 April 2018
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KEYWORDS
brachiopod
Choanji
Japan
Late Devonian
South Kitakami Belt
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