Dacryomya

Dacryomya; Temporal range: Lower/MiddleJurassic,183–161Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Two entireshellsofDacryomya lacryma
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Nuculanida
Family:	Nuculanidae
Genus:	Dacryomya; Agassiz, 1840
Species
	D. kiparisovaeKurushin, 1990 ; D. lacryma(Sowerby, 1824)=Leda lacryma ; D. peculiarisKurushin, 1990 ; D. skorochodiKiparisova, 1938 ;

Dacryomya,or the pointed nutclam is an extinctgenusof small-sized (approximately 1 centimetre (0.39 in) long) saltwater clams, marinebivalve molluscsin the nutclamfamily Nuculanidae.The size and shape of the shells of species in this genus are reminiscent of broad apple pips.

Distribution[edit]

Dacryomyalived during the Lower and Middle Jurassic, possibly throughout theTethysFaunal Province.^[1]Fossils ofD. lacrymaare known from the very late Lower Jurassic (Toarcian) of France (Causes, 44.3° N, 3.3° E);^[2]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).^[3]

Habitat[edit]

The fossil locations cited were open shallowsubtidalareas,^[2]where this mollusc lived as a facultatively mobile infaunal deposit feeder-suspension feeder.^[4]

Other views[edit]

These additional views of the two shells ofDacromya lacrymagive more information about the overall shape of the shell in that species:

References[edit]

^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 Sciences59:195-214
^^a ^bFürsich, 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[1]
^F.T. Fürsich. 2006. Unpublished data from Kachchh
^Paleobiology Database

[Kiessling_et_al.-1] 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 Sciences59:195-214

[Fürisch_et_al.-2] 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[1]

[Fürsich-3] F.T. Fürsich. 2006. Unpublished data from Kachchh

[4] Paleobiology Database

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