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Xenophora
''Xenophora'', commonly called carrier shells, is a genus of medium-sized to large sea snails, marine gastropod mollusks in the family Xenophoridae, the carrier snails or carrier shells.WoRMS (2012). Xenophora. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138664 on 2012-06-28 The genus ''Xenophora'' is the type genus of the family Xenophoridae. Etymology The name ''Xenophora'' comes from two ancient Greek words, and means "bearing foreigners", so-called because in most species the snail cements pieces of rock or shells to its own shell at regular intervals as the shell grows. Description The shells of species within this genus vary from small to large (diameter of base without attachments 19–90 mm; height of shell 21–60 mm), depressed-conical, with narrow to very narrow, simple peripheral edge, non-porcellanous ventrally. Foreign objects are attached to all whorls, with generally more than 30% of d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenophora Crispa
''Xenophora crispa'', the Mediterranean Carrier Shell, is a species of large sea snail, a marine (ocean), marine gastropod mollusk in the family (biology), family Xenophoridae, the carrier shells. Fossil record There are currently 16 known species in the genus, Xenophora. Fossils of ''Xenophora crispa'' are found in marine strata of Pliocene of Italy and Spain (age range: from 3.6 to 2.588 million years ago.). The Pliocene stage is the last stage of the Tertiary period before the Quaternary ice ages. This stage was the final of global cooling. Fossils of the genus ''Xenophora'' are found in marine strata from Cretaceous to Quaternary (age range : 89.3 to 0.012 million years). Although ''Xenophora crispa'' are found specifically in Italy and in Spain, fossils from the genus ''Xenophora'' can be found all over the world. Description Shells of ''Xenophora crispa'' can reach a size of . They are trochoid, depressed-conical shells, non-porcellanous ventrally, with narrow peripheral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |