Imaclava unimaculata

Imaclava unimaculata
Apertural view of a shell of Imaclava unimaculata (museum specimen at Naturalis Biodiversity Center)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Drilliidae
Genus:	Imaclava
Species:	I. unimaculata
Binomial name
Imaclava unimaculata (Sowerby I, 1834) [1]
Synonyms [2]
Clathrodrillia unimaculata(Sowerby I, 1834) Clathrodrillia (Imaclava) unimaculata(Sowerby I, 1834) Clavus pembertoniH. N. Lowe, 1935 Clavus unimaculata(Sowerby I, 1834) Clavus (Imaclava) unimaculata(Sowerby I, 1834) Drillia (Brachystoma) unimaculata(Sowerby I, 1834) Drillia (Crassispira) unimaculata(Sowerby I, 1834) Drillia (Imaclava) unimaculata(Sowerby I, 1834) Imaclava pembertoni(H. N. Lowe, 1935) (junior synonym) Pleurotoma unimaculataSowerby I, 1834 (basionym) Pleurotoma (Drillia) unimaculata(Sowerby I, 1834)

Imaclava unimaculata, common name the brown-spot turrid, is a species of sea snail, a marine gastropod mollusk in the family Drilliidae. ^{[2] [3] [4]}

Taxonomy

• Imaclava unimaculata belongs to the family Drilliidae, a group of predatory marine snails often referred to as turrids. Members of this family are characterized by elongate shells and complex radular teeth used for capturing prey. ^[3]
• Imaclava pembertoni was originally described as Clavus pembertoni by H. N. Lowe in 1935, based on material collected off Punta Peñasco, Sonora, Mexico, and published in Transactions of the San Diego Society of Natural History 8(6): 15–34. ^[4]

Description

The size of an adult shell varies between 25 mm and 47 mm.

The shell is elongate, with a high spire and a siphonal canal typical of the family. The sculpture consists of axial ribs and spiral grooves, giving the shell a textured appearance. The shell lacks a sutural band or spiral striae. The knobs on the periphery are rather short, instead of terminating ribs as in Clathrodrillia gibbosa (Born, 1778). The shell is yellowish brown, spotted with chestnut, and with one large spot on the back of the body whorl. ^[5]

According to Lowe (1935), the shell is "elongate oval-conic to rather turriculate-conic", with about six flat-sided whorls (only four preserved in the specimen examined), and a narrow juxtasutural band delineated by a vague spiral depression. ^[4]

Distribution

This species occurs in the demersal zone of the Pacific Ocean from Sea of Cortez, along the western coast of Mexico to Colombia. Records indicate its habitat is primarily shallow to moderately deep marine environments, often associated with sandy or muddy substrates. ^[4]

References

1. Sowerby, G.B., I. (1834) Characters of new species of Mollusca and Conchifera. Proceedings of the Zoological Society of London, 1833, 134–139.
2. Imaclava unimaculata (Sowerby I, 1834) . Retrieved through: World Register of Marine Species  on 26 October 2011.
3. Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
4. Lowe, H.N. (1935). "New Marine Mollusca from West Mexico: Together with a List of Shells Collected at Punta Peñasco, Sonora, Mexico". Transactions of the San Diego Society of Natural History. 8 (6): 15–34.
5. G.W. Tryon, Manual of Conchology vol. VI p. 180; 1884 (described as Drillia unimacalata)

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

External links

• "Imaclava unimaculata". Gastropods.com. Retrieved 16 January 2019.