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Rapana
''Rapana'' is a genus of large predatory sea snails, marine gastropod mollusks in the family Muricidae, the rock snails. Description The shell of ''Rapana'' has a large body whorl, a correspondingly large aperture and a low spire. The surface is covered in a thin calcitic layer. The rachidian teeth have three large cusps but no marginal cusps, instead the outer sides of the lateral cusps on the rachidian have a comb-like region. Species Species within the genus ''Rapana'' include: * ''Rapana bezoar'' (Linnaeus, 1767) * '' Rapana rapiformis'' (Born, 1778) * ''Rapana venosa'' (Valenciennes, 1846)Rapana venosa (Valenciennes, 1846) Zugriff über |
Veined Rapa Whelk
''Rapana venosa'', common name the veined rapa whelk or Asian rapa whelk, is a species of large predatory sea snail, a marine gastropod mollusc or whelk, in the family Muricidae, the rock shells. This large sea snail has become an invasive species in many different localities around the world. Shell description The shell of ''Rapana venosa'' is globose (rounded) and heavy, possessing a very short spire, a large body whorl, a strong columella and a deep umbilicus. The aperture is large and roughly ovate. Ornamentation is present externally as axial ribs, smooth spiral ribs ending in blunt knobs at both the shoulder and body whorl, and internally as small elongated teeth disposed along the outer lip margin. The external color varies from gray to reddish-brown, with dark brown dashes on the spiral ribs. Some specimens may have distinctive black/dark blue vein-like coloration patterns throughout the inner portions of the shell, usually originating from each individual too ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
