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.
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Vol. 22 • No. 2