Ptychobela lavinia

Ptychobela lavinia, common name the lavinia turrid, is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1]

Ptychobela lavinia
Shell of Ptychobela lavinia (hootype at the Smithsonian Institution)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Pseudomelatomidae
Genus: Ptychobela
Species:
P. lavinia
Binomial name
Ptychobela lavinia
(Dall, 1919)
Synonyms[1]

Turricula (Surcula) lavinia Dall, 1919

Description

The length of the shell varies between 35 mm and 50 mm.

(Original description) the shell is rather coarse with about a dozen whorls. The color of the shell is yellowish or light brown. The protoconch is smooth and slightly bulbous. The suture is strongly appressed with a spiral cord in front of it. The whorls are moderatelyshouldered. The anal fasciole is somewhat concave and spirally striate. The axial sculpture consists of (on the body whorl about 12) protractively oblique rounded ribs with subequal interspaces, prominent on the periphery, attenuated on the base and not reaching the siphonal canal. The incremental lines are sharp, sometimes almost threadlike. The spiral sculpture consists of (from three to five on the spire, about 10 on the body whorl) strong, rounded cords overriding the ribs and not swollen at the intersections. The interspaces are subequal and sometimes with an intercalated smaller thread. Lastly the surface is finely minutely spirally striate in the intervals between the larger threads and cords. The aperture is narrow. The anal sulcus is close to the suture, short and rounded, with a subsutural callus. The outer lip is produced, thin edged, more or less crenulate from the spiral sculpture and smooth within. The inner lip and the columella show a rather thick layer of callus with a slightly raised outer edge. The columella is straight. The siphonal fasciole is feeble. The siphonal canal is short, wide and recurved. [2]

Distribution

This species occurs in the Pacific Ocean between Mexico and Peru

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References
  1. Ptychobela lavinia (Dall, 1919). Retrieved through: World Register of Marine Species on 4 April 2010.
  2. Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceedings of the U.S. National Museum, vol. 56 (1920) This article incorporates text from this source, which is in the public domain.
  • Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
  • Gastropods.com: Ptychobela lavinia
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