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Dacryomya
''Dacryomya'', or the pointed nutclam is an extinct genus of small-sized (approximately long) saltwater clams, marine bivalve molluscs in the nutclam family Nuculanidae. The size and shape of the shells of species in this genus are reminiscent of broad apple pips.
==Distribution==
''Dacryomya'' lived during the Lower and Middle Jurassic, possibly throughout the Tethys Faunal Province.〔W. Kiessling, D. K. Pandey, M. Schemm-Gregory, H. Mewis, and M. Aberhan. 2011. "Marine benthic invertebrates from the Upper Jurassic of northern Ethiopia and their biogeographic affinities". ''Journal of African Earth Sciences'' 59:195-214〕 Fossils of ''D. lacryma '' are known from the very late Lower Jurassic (Toarcian) of France (Causes, 44.3° N, 3.3° E);〔Fürsich, F.T., R. Berndt, T. Scheuer and M. Gahr. Comparative ecological analysis of Toarcian (Lower Jurassic) benthic faunas from southern France and east-central Spain. Lethaia 34:169-199. 2001 ()〕 the early middle Middle Jurassic (Bajocian) of Germany (Sengenthal); and the very late Middle Jurassic (Callovian) of India (the Gadhada Sandstone Member and the Chari Formation, 23.5° N, 70.5° E).〔(F.T. Fürsich. 2006. Unpublished data from Kachchh )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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