Gemmula hastula

Gemmula hastula
	Shell of Gemmula hastula
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Turridae
Genus:	Gemmula
Species:	G. hastula
Binomial name
	Gemmula hastula; (Reeve, 1843)
Synonyms
	Gemmula (Unedogemmula) hastula (Reeve, 1843); Pleurotoma hastula Reeve, 1843; Pleurotoma trypanodes Melvill, J.C., 1904; Turris (Tomopleura) trypanodes Melvill, 1904; Unedogemmula trypanodes J.C. Melvill, 1904;

Gemmula hastula is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.^[1]

Description

The length of the shell varies between 25 mm and 39 mm.

(Original description by Reeve) The small and slender has an elongate-fusiform shape with a long, almost straight siphonal canal. This species is chiefly characterized by the stout double ridge that encircles each whorl near the suture, and by the central ridge that is formed in place of the slit as the shell advances in growth. The whitish shell is axially marked and diffused with yellowish-brown spots.^[2]

(Description by Melvill) An elegant tornate species, with produced siphonal canal, and spiral ribbing somewhat similar to that of Tomopleura nivea (Philippi, 1851), but more regular. The shell is white, tinted yellowish around the upper double carinae of each whorl. Just below the sutures these carinae are spirally deeply punctulate, an item omitted in the original description. As regards the nuclear whorls, the first two are vitreous, globular, smooth, and shining, the two next, also vitreous, but spirally nodulous.^[3]

Distribution

This marine species occurs in the Persian Gulf, the Arabian Sea and off the Philippines

References

^ ^a ^b Gemmula hastula (Reeve, 1843). Retrieved through: World Register of Marine Species.
^ * Reeve L.A. (1844 ["1843"]). Descriptions of new species of shells figured in the ‛Conchologia Iconica'. Proceedings of the Zoological Society of London. 11: 168-19
^ Melvill J.C., 1917. A revision of the Turridae (Pleurotomidae) occurring in the Persian Gulf, Gulf of Oman and north Arabian Sea as evidenced mostly through the results of dredgings carried out by Mr F. W. Townsend, 1893~1914. Proc. Malac. Soc. Lond. 12: 140-201, pls. 8-10 This article incorporates text from this source, which is in the public domain.

External links

[WoRMS-1] Gemmula hastula (Reeve, 1843). Retrieved through: World Register of Marine Species.

[2] * Reeve L.A. (1844 ["1843"]). Descriptions of new species of shells figured in the ‛Conchologia Iconica'. Proceedings of the Zoological Society of London. 11: 168-19

[3] Melvill J.C., 1917. A revision of the Turridae (Pleurotomidae) occurring in the Persian Gulf, Gulf of Oman and north Arabian Sea as evidenced mostly through the results of dredgings carried out by Mr F. W. Townsend, 1893~1914. Proc. Malac. Soc. Lond. 12: 140-201, pls. 8-10 This article incorporates text from this source, which is in the public domain.

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