It is characterized by a large shell between about 150–200 mm in triangular or wedge, the leaflets have ornamentations forming rows 10-20 tubular radial spiny projections which are often slightly curved. The surface of the leaflets tend to observe fine markings which correspond to the long lines. The coloration is variable ranging from dark brown to greenish brown. In the animal body highlights large posterior adductor muscle development, which in individuals of sizes between 150 and 200 mm can reach a diameter of about 40 mm.[1][2]
Atrina seminuda, is an endobenthic inhabitant, usually secured by a strong byssus secreted by the animal in rocks and gravel substrate in areas of high energy.[2] Associated with the outer faces of the leaflets of Atrina seminuda usually inhabit a range of fouling organisms among them being common gastropod mollusks, bivalves and chitons.[6]
Venezuelan folk tradition on its shores this bivalve is known under several names like so: rompechinchorro,[1] hacha,[1] cocha abanico,[1] papa reina[7] y cucharon[8]
^ abcdefLodeiros Seijos, J.M., Marin Espinosa, Baumar. y Prieto Arcas, Antulio. 1999: Catalogo de moluscos marinos de las costas nororientales de Venezuela: Clase Bivalvia. Asociación de Profesores de la Universidad de Oriente, Cumaná - Venezuela 112p.
^ abcdMacsotay O. & Campos. R. 2001. Moluscos representativos de la plataforma de Margarita. Editora Rivolta. Valencia. 280p. ISBN980-328-808-3
^Abbott, R.T. & Morris, P.A. A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies. New York: Houghton Mifflin, 1995. 25.
^Tello, J. 1975: catálogo de la fauna venezolana.VII. Mollusca. C.O. III Conferencia de la Naciones Unidas sobre el derecho del Mar. 599p.
^Ramós, G.H. y Robaina, G. 1994: Contribución a la conocimiento de los moluscos gasterópodos y pelecipodos de la bahía de Mochima, Edo. Sucre, Venezuela. Memoria de la Sociedad de Ciencias Naturales La Salle, 54(141):95-106
^Cervigon, Fernando. y Velázquez Efigenio. (1981): Nombre vernáculos de organismos marinos del Estado Nueva Esparta. Fernando Cervigon Editor Caracas-Venezuela.