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The Limidae or file shells are members of the only family of bivalve molluscs in the order Limida. [1] The family includes 130 living species, assigned to 10 genera . Widely distributed in all seas from shallow to deep waters, the species are usually epifaunal or nestling, with many species building byssal nests for protection.
The shell of an adult Lima lima can be as long as 30–79 millimetres (1.2–3.1 in). The surface of the valves show 18–24 strong ribs [ 4 ] covered with small scales. These clams are filter feeders .
Lima is a genus of file shells or file clams, marine bivalve molluscs in the family Limidae, the file shells, within the subclass Pteriomorphia. [1] [2] The shells are obliquely trigonal, and strongly radially ribbed, the ribs scabrous to spinose. The soft parts are bright red and many tentacles protrude from the open valves.
Rowland F. Zeigler - Olive Shells of the World; Günther Sterba - Olividae - A Collector's Guide; Edward J. Petuch, Dennis M. Sargent - Atlas of the Living Olive Shells of the World - Coastal Education & Research Foundation (U.S.) Bernard Tursch, Dietmar Greifeneder - Oliva shells: the genus Oliva and the species problem
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Tentaculites is an extinct genus of conical fossils of uncertain affinity, class Tentaculita, although it is not the only member of the class.It is known from Lower Ordovician to Upper Devonian deposits [1] both as calcitic shells with a brachiopod-like microstructure [2] and carbonaceous 'linings'.
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The height of the shell varies between 10 mm and 20 mm. The pointed, imperforate, solid shell has an elongated conic shape. It is polished, yellowish, pink, or olive-green, with reddish or olive longitudinal lines in pairs, sometimes separate on the body whorl, and usually with numerous narrow, rather obscure spiral pink or yellowish lines.