<i>Lingularia</i> sp. (Brachiopoda) from Middle Triassic bedded chert in Shikoku, Japan

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  • 四国の三畳系層状チャートから産出した<i>Lingularia</i> sp. (腕足類)
  • Lingularia sp. (Brachiopoda) from Middle Triassic bedded chert in Shikoku, Japan

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Abstract

A lingulid brachiopod Lingularia sp. is described from Middle Triassic (Anisian) bedded chert in the Northern Chichibu Terrane, Shikoku, Japan. The fossil occurrence is unusual because of its association within deep-sea sediments. Lingulids are well known from Early and Middle Triassic successions and their apparent abundance may relate to the recovery following the Permian/Triassic (P/T) extinction event. This find in Japan tends to support the view that lingulids favoured dysoxic conditions and became widespread in vacant niches of the ocean after the P/T boundary anoxic event as “opportunistic taxa”.

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