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Thracia (bivalve)
''Thracia'' is a genus of bivalve mollusc in the family Thraciidae.Bouchet, P.; Gofas, S. (2012). Thracia. In: MolluscaBase (2016). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138549 on 2016-05-25 Authority The name is dated by Sherborn from Sowerby's "Mineral conchology of Great Britain" (1823: vol. 5 p. 20) but therein it is only a mention of a manuscript name by Leach, without a description. It is made available, with a full generic description, in Blainville's article "Mollusques" of "Dictionnaire des Sciences Naturelles" vol. 32, p. 347. Type species The designation of the type species of ''Thracia'' is far from straightforward. The description by Blainville (1824) includes two species: his own ''T. corbuloidea'' and ''T. pubescens'' Leach. However, at that time ''T. corbuloidea'' was still a nomen nudum, and not available nomenclaturally. Also Leach did ''not'' publish the name ''pubescens'', which i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thracia Convexa
''Thracia convexa'' is a bivalve mollusc in the family Thraciidae. Description ''Thracia convexa'' grows to about 6 centimetres (2.4 in) in length. The shell is inflated and brittle and the right valve is slightly larger and more convex than the left one. The outline is roughly triangular with the anterior end rounded and the posterior end somewhat elongated. The surface is sculptured with fine concentric lines and a slight ridge extends from the umbone to the margin of the valve on the posterior end. There are both external and internal ligaments joining the valves and there are no teeth on the hinge. On the inside of the valve, the posterior adductor muscle scar is large and triangular while the anterior one is long and thin. The pallial sinus is small. The valves gape at the posterior end where the two separate sinuses emerge. The colour of the valves is white both outside and inside and the periostracum, when present, is yellowish green. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |