Guraleus Tasmanicus
''Guraleus tasmanicus'' is a species of sea snail, a marine gastropod mollusk in the family (biology), family Mangeliidae.Marshall, B. (2015). Guraleus tasmanicus (Tenison-Woods, 1876). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=432716 on 2017-07-12 Description The length of the shell attains 12 mm, its diameter 5 mm. (Original description) The shell is fusiform, attenuate at both ends, ivory white, between the lirae tinged with very pale red. The Spire (mollusc), spire is raised and longer than the Aperture (mollusc), aperture. The shell contains 7 whorls, convex, angular behind and excavate above. They are elegantly ribbed lengthwise (12–14 in body whorl), transversely regularly lirate. The ribs are angular, smooth, shining. The lirae are broad and flattened. The Aperture (mollusc), aperture is narrowly ovate. The outer Lip (gastropod), lip is thin.
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Sea Snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example species in the genus '' Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large group of animals and a very diverse one. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide when they can move around in the air. These air-breathing species includ ...
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