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Pusula labiosa (Gaskoin, 1836)

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Pusula labiosa

Autor: Fehse & Grego

Taxon v check-listech zemí*

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Original description by Gaskoin (1836: 202):
"Cypraea pediculus var. labiosa ... Cypr. Testa ovali, lata, extremitatibus rotundatis; costis prominentioribus, nullis supra labium externum terminantibus; marginibus, latioribus crassioribus; linea dorsali profundiore, fusca; basi marginibusque cinerascenti-griseis; dentibus albis.

Shell oval, of a reddish brown on the back, running into bluish brown on the sides; six rather large brown spots on the back, three on each side of the dorsal line, placed opposite to each other at the anterior, middle, and posterior parts of the back; base of a greyish brown colour, rounded and broad. Aperture rather wide, white within; teeth about twenty on the lip, white, prominent, even and distant, and all continuing evenly over the lip forming the ribs, several of which terminate on the side of the shell, the others (about twelve) at the dorsal line, in elevated and broad or thickened ends; on the columella there are about fifteen teeth, a few of which, continuing to form the ribs, terminate on the side of the shell, the rest at the dorsal depression, in a similar form to those on the opposite side; there are about two floating ribs, false ribs at each end. Columellar groove very shallow posteriorly, rather deeper and wider anteriorly [fossula]; the teeth passing, slightly prominent, across it form a serrated edge at its inner border. Margins much thickened and produced, terminating in a coronated ridge all around the shell, scarcely more prominent at the extremities than on (he outer or lip side. Extremities round. Dorsal line rather broad, deep, shining, and of darker brown colour than the back."

Shell between 10 and 17 mm, callused, fairly heavy weight, solid, inflated, glossy and almost circular. Spire covered by callus. Body whorl sub-triangular, inflated and rounded, about 90% of total height, with both terminals slightly produced. Both terminal tips slightly indented. Dorsum roundly elevated, completely covered by ribs - about 16 on average - with a narrow, long, incised sulcus mid-dorsally that bisects the ribs. Dorsal ribs fine, numerous, forming nodules along both sides of the dorsal sulcus. Nodules almost fused together forming a wall along the walls. Ventrum convex. Aperture narrow over its entire length widened only barely at the fossular section. Aperture straight but curved posteriorly. Labrum roundly callused, fairly broad, slightly curved, keeled towards its inner margin. Outer labral margin roundly callused and slightly edge. Labrum bears on its inner margin on average 16 fine denticles. Siphonal and anal canals follow the shell profile. Columella straight, narrow and tapering steeply inwards. Parietal lip sinuous, slightly keeled, crossed by on average 14 ribs.
Fossula concave and not clearly delimited from the rest of the columella. Inner fossular edge slightly protruded. Dorsum light beige with numerous brownish dots and three almost black, irregular patches on both ends of the sulcus and one on the dorsal center. Margins brownish with light beige dots, shell periphery and terminal collars lighter coloured, ventrum rosy brown with a whitish patch on its center, columella and fossula pure white.
Fehse D & Grego J - 2014 - Revision of the genus Pusula (Mollusca Gastropoda Triviidae)


Bahamas: Off Eleuthera Island; Off Turtle Rocks, South Bimini. Brazil: Guarapari, Espirito Santo: Recife. Cuba: Varadero Beach Honduras: Off Roatan Island. Trinidad & Tobago: Store Bay, Tobago Island. U.S.A.: Peanut Island, W Palm Beach, Florida; Florida Keys.
Fehse D & Grego J - 2014 - Revision of the genus Pusula (Mollusca Gastropoda Triviidae)

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