Paracomitas undosa

Paracomitas undosa
	Original image of a shell of Paracomitas undosa
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Pseudomelatomidae
Genus:	Paracomitas
Species:	P. undosa
Binomial name
	Paracomitas undosa; (Schepman, 1913)
Synonyms[1]
	Surcula undosa Schepman, 1913

Paracomitas undosa is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1]

Description

The length of the shell attains 30 mm, the diameter 4½ mm (this may have been more if the peristome was complete).

(Original description) The elongately fusiform shell has a rather long siphonal canal. The rather strong shell is yellowish-white. The protoconch is wanting. The 6½ remaining whorls are separated by a conspicuous, simple suture. They are convex and slightly excavated at their upper part. The sculpture consists of numerous, very irregular, spiral striae, more conspicuous at the base of shell and siphonal canal, scarcely traceable in the excavation. The upper whorls show a peripheral row of obtuse tubercles, which in the uppermost whorls have the character of ribs. These tubercles disappear on the body whorl, which has only a more prominent keellike spiral just below the excavation. The whorls are moreover crossed by numerous growth lines, strongly curved and conspicuous in the excavation, oblique and sometimes riblike in the lower part, which produces a wavy appearance of some parts of the shell. The aperture is oblong, angular above, ending below in a rather long, broad siphonal canal, slightly directed to the left The peristome is broken, but according to growth lines shows a deep sinus at the suture, then is strongly protracted. The columellar margin is regularly curved, with a thin layer of enamel, slightly contorted along the siphonal canal. [2]

Distribution

This marine species occurs in the Flores Sea and the Molucca Passage, Indonesia

References

Paracomitas undosa (Schepman, 1913). Retrieved through: World Register of Marine Species on 31 March 2010.
Schepman, 1913. The prosobranchia of the Siboga expedition. Part IV -V - VI: Toxoglossa This article incorporates text from this source, which is in the public domain.

External links

Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.

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[WoRMS-1] Paracomitas undosa (Schepman, 1913). Retrieved through: World Register of Marine Species on 31 March 2010.

[2] Schepman, 1913. The prosobranchia of the Siboga expedition. Part IV -V - VI: Toxoglossa This article incorporates text from this source, which is in the public domain.