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Clavus (gastropod)

Clavus is a genus of small sea snails, marine gastropod mollusks in the family Drilliidae.[1][2]

Clavus
A shell of Clavus exasperatus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Drilliidae
Genus: Clavus
Montfort, 1810
Type species
Clavus flammulatus
Montfort, 1810
Species

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Synonyms[1]
  • Clavicantha Swainson, 1840
  • Clavus (Tylotiella) Habe, 1958 ·
  • Drillia (Clavus)
  • Eldridgea Bartsch, 1934
  • Pleurotoma (Clavus) Montfort, 1810
  • Tylotia Melvill, 1917
  • Tylotiella Habe, 1958

Description

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Apart from the general characteristics of the genera in the family Drilliidae, the species in the genus Clavus have a shell with peripheral tubercles, spines or wing-like processes.[3] The aperture is rather large. The outer lip is produced below the sinus.[4]

The shell of Clavus is characterised by the following features:— Flat indefinite fasciole, indicated only by the curve of growth lines. A smooth subulate protoconch. An insinuation of the outer lip, near the base, like that of Strombus. A major sculpture of prominent arched scales on the shoulder, and a minor sculpture of dense, microscopic, waved, spiral striae.[5]

Most species in this genus have a dorsal varix. But this is absent in a few species such as Clavus beckii, Clavus humilis and Clavus pica.

G.W. Tryon correctly preserved the genus for smooth specimens with a short body whorl, long spire, nodulous shoulder, no spiral sculpture, a wide, deep anal sulcus adjacent to the suture and, in the completely adult, a marked subsutural callus on the body.[6]

Distribution

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The species in this genus occur in the Red Sea, In the Indian Ocean off Mozambique; also off Indonesia, New Caledonia, Papua New Guinea, the Philippines, Solomon Islands, Japan and Australia (New South Wales, Northern Territory, Queensland, Western Australia).

Species

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According to the World Register of Marine Species (WoRMS) the following species with valid names are included within the genus Clavus :[7]

Species brought into synonymy
Species inquirenda

The Indo-Pacific Molluscan Database adds the following species with names in current use :

Subgenus Clavus

References

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  1. ^ a b Clavus. Retrieved through: World Register of Marine Species on 21 August 2010.
  2. ^ P. Bouchet; Yu. I. Kantor; A. Sysoev; N. Puillandre (2011). "A new operational classification of the Conoidea (Gastropoda)". Journal of Molluscan Studies. 77 (3): 273–308. doi:10.1093/mollus/eyr017.
  3. ^ Chen-Kwoh Chang, Small Turrids of Taiwan, Chapter 3 , History and Taxonomy of the Clavidae; June 1, 2001[permanent dead link‍]
  4. ^ George Washington Tryon, Manual of Conchology vol. VI p. 155; 1884 (treated as section within the genus Drillia)
  5. ^ Hedley, Charles (1920), A revision of the Australian Turridae; Records of the Australian Museum, vol. XIII nr. 6, Sydney
  6. ^ W.H. Dall (1918) Notes on the nomenclature of the mollusks of the family Turritidae; Proceedings of the United States National Museum v. 54 (1918)
  7. ^ WoRMS : Clavus
  • Montfort, 1810 [Conchyliologie systématique, 2: 434]
  • Habe T. (1958). On the radulae of Japanese marine gastropods (4). Venus. 20(1): 43-60, pls 2-3
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