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”.
2004 by The Geological Society of Japan