Thracia phaseolina

Thracia phaseolina is a bivalve mollusc in the family Thraciidae.^[1]

Thracia phaseolina
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Superfamily:	Thracioidea
Family:	Thraciidae
Genus:	Thracia
Species:	T. phaseolina
Binomial name
Thracia phaseolina (Lamarck, 1818)
Synonyms
Amphidesma phaseolina Lamarck, 1818 (original combination) Peronaea textilis O. G. Costa, 1830 Tellimya fontemaggii Conti, 1864 Tellina papyracea Poli, 1791 (invalid: published in December 1791 and thus a junior homonym of Tellina papyracea Gmelin, 1791 [before May]) Thracia beaniana Récluz, 1845 Thracia mitella Gregorio, 1884 Thracia papyracea (Poli, 1791) Thracia papyracia (misspelling)

Description

The ovate shell is oblong, transverse, equilateral and inequivalve. The beaks are small; that of the left, slightly notched. The valves are white, diaphanous and smooth, indistinctly marked with striae of increase, rounded at the anterior side, strongly truncated at the posterior side. The side is bounded outwardly by an obtuse angle, pretty prominent, extending obliquely from the beak to the lower part of the shell. The cardinal edge is thin, and without teeth. It presents upon the posterior side the beaks with a small, internal, short, triangular hollow, in which is attached a small internal ligament which is apparent externally. The valves are white and shining, internally. The anterior muscular impression is elongated, the posterior is rounded, and is united to the anterior by a pallial impression, deeply notched.^[2]

Right and left valve of the same specimen:

• 
  Right valve
• 
  Left valve

Distribution

Thracia phaseolina is found in the North Atlantic Ocean and in the North Sea. It is also found in the Mediterranean Sea and the Gulf of Mexico.