Caryocorbula J.Gardner, 1926

Dataset
GBIF Backbone Taxonomy: Rank
GENUS: Published in
Nautilus, 40, 45

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Classification

kingdom
Animalia: phylum
Mollusca: class
Bivalvia: order
Myida: family
Corbulidae: genus
Caryocorbula

diagnosis

Diagnosis. Shell trigonal to ovate-elongate, small to moderate in size, subequivalve to inequivalve, subequilateral, with a weak to moderate keel between the central and posterior slope. Posterior slope elongated, forming a rostrum. Right valve slightly larger than left, with a marginal groove along the free internal margin where the opposite valve fits. Sculpture of weak to strong commarginal ribs, similar or slightly different on both valves; fine radial striations may also be present. Lunule area not demarcated. Right valve hinge with anterior cardinal tooth upcurved at the dorsal margin, and with a posterior deep resilial socket. Left valve hinge with anterior cardinal socket to insertion of right cardinal tooth, and with posterior chondrophore; chondrophore moderately broad, projected and flattened, with a weak to well developed median ridge on the dorsal side, frequently provided with a narrow to large posterior knob. Nepioconch not distinguished.

discussion

Remarks: Caryocorbula includes most American species assigned to Cuneocorbula Cossmann, 1886 (Gardner 1926; Anderson 1996). According to Coan (2002), Serracorbula Olsson, 1961, is a junior synonym of Caryocorbula. It is difficult to define Caryocorbula, as its characteristics are present to a greater or lesser degree in other genera of Corbulinae. The species of Caryocorbula can be discriminated from other Corbulinae by an integrated set of features: trigonal or ovate-elongated shell with a keel between the central and posterior slope and elongated posterior rostrum, a moderately broad and projected chondrophore and the lack of a nepioconch. According to Goodwin et al. (2008) Caryocorbula species have a GF 2 growth pattern without a nepioconch. The species analyzed in the present work seem to agree with this pattern, except for Caryocorbula chittyana which has a nepioconch-like pre-accretion shell.

Name

Synonyms: Serracorbula Olsson, 1961
Homonyms: Caryocorbula Bruguiere, 1792; Caryocorbula J.Gardner, 1926

Bibliographic References

CoL2006
Coan, E. V.; Valentich-Scott, P. (2012). Bivalve seashells of tropical West America. Marine bivalve mollusks from Baja California to northern Peru. 2 vols, 1258 pp.
Nautilus, 40, 45
Neave, S. A. (1939-1996). Nomenclator Zoologicus vol. 1-10 Online. [developed by uBio, hosted online at MBLWHOI Library].
Neave, S. A. (1939-1996). Nomenclator Zoologicus vol. 1-10 Online. [developed by uBio, hosted online at MBLWHOI Library].
SN2000 unverified
Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. Bulletins of American Paleontology. 363, 1-560.
Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. Bulletins of American Paleontology. 363, 1-560.
Squires, R.L. & Saul, L.R. (2004). Cretaceous corbulid bivalves of the Pacific Slope of North America. The Veliger. 47(2): 103–129.
WoRMS (Mar 2013)
WoRMS (Mar 2013)