Pleurotomella aculeata

Pleurotomella aculeata is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.[1]

Pleurotomella aculeata
Original image of a shell of Pleurotomella aculeata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Raphitomidae
Genus: Pleurotomella
Species:
P. aculeata
Binomial name
Pleurotomella aculeata
(Webster, 1906)
Synonyms[1]
  • Asperdaphne aculeata (Webster, 1906)
  • Daphnella aculeata Webster, 1906 (original combination)

Description

The length of the shell attains 6 mm, its diameter 3.3 mm.

(Original description) The shell is buff-coloured, lighter towards the apex and siphonal canal. It contains five whorls, including a reticulated protoconch of 1¼ whorl.

The sculpture : Longitudinally and slightly diagonally ribbed, the ribs crossed by two strong spiral keels. The ribs and keels are about equal in strength, the intersections forming sharp points. The body whorl has upon the base four additional keels, the space between the two peripheral keels and the four on the base being greater than that between any other two. A fine thread is visible in this wide space, there is also a duplication of the posterior keel. The body whorl has about twelve ribs. The sutures of the early whorls are sharp, those of the latter are concavely round. The columella descends vertically from the body whorl. The siphonal canal, which is straight, has about eight faint striations. The space between the suture and the first spiral keel contains the anal fasciole. Under magnification one can see faint radial striations between the keels, also the reticulation of the protoconch. The sinus of the type is so little damaged that to draw it perfect can scarcely be called reconstruction. [2]

Distribution

This marine species is endemic to New Zealand and occurs off Northland

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References
  1. MolluscaBase (2019). Pleurotomella aculeata (Webster, 1906). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=599025 on 2019-02-03
  2. Webster, W.H. (1906) Results of dredging on the continental shelf of New Zealand. Transactions and Proceedings of the New Zealand Institute, 38, 305–316, pl. 38 This article incorporates text from this source, which is in the public domain.
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland
  • Spencer H.G., Willan R.C., Marshall B.A. & Murray T.J. (2011). Checklist of the Recent Mollusca Recorded from the New Zealand Exclusive Economic Zone
  • Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
  • Beu, A.G. 2011 Marine Molluscs of oxygen isotope stages of the last 2 million years in New Zealand. Part 4. Gastropoda (Ptenoglossa, Neogastropoda, Heterobranchia). Journal of the Royal Society of New Zealand 41, 1–153
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