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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.
Cercozoa (now synonymised with Filosa) [2] is a phylum of diverse single-celled eukaryotes. [4] [5] They lack shared morphological characteristics at the microscopic level, [6] and are instead united by molecular phylogenies of rRNA and actin or polyubiquitin. [7]
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.
Photos of Ctenoides ales on Sealife Collection This page was last edited on 9 May 2024, at 00:51 (UTC). Text is available under the Creative Commons Attribution ...
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
In the 1830s, the German microscopist Christian Gottfried Ehrenberg examined many water and plankton samples and proposed several dinoflagellate genera that are still used today including Peridinium, Prorocentrum, and Dinophysis. [16] These same dinoflagellates were first defined by Otto Bütschli in 1885 as the flagellate order Dinoflagellida ...
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.
The shell may vary in color and pattern. The shell has a reticulate (= net-like) structure with strong radial ribs and lacks an operculum. The shell ranges from 3 mm to 13.2 cm. The great keyhole limpet (Megathura crenulata) measures up to 13.2 cm. For respiration, the shells of fissurellids have a single apical or subapical perforation ...