Buccinum oblitum

Buccinum oblitum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
clade Hypsogastropoda
clade Neogastropoda
Superfamily: Buccinoidea
Family: Buccinidae
Subfamily: Buccininae
Genus: Buccinum
Species: B. oblitum
Binomial name
Buccinum oblitum
Sykes, 1911[1]

Buccinum oblitum is a species of sea snail, a marine gastropod mollusk in the family Buccinidae, the true whelks.[2]

Description

The shell is up to 20 mm high, solid, with 5-6 moderately convex whorls and a conical spire.[3] The last whorl is about 70% of total height.[3] Protoconch of one smooth, mucronate whorl.[3] Teleoconch is with a variably developed sculpture consisting of spiral cords and threads, and slightly flexuous or straight axial folds.[3] There are usually three cords on the early spire whorls, rather flat and as broad as the interspaces, later the second-order spiral threads are intercalated.[3] The main spiral cords tend to form small knobs at their intersections with the axial folds, which are narrower than the interspace and may be wanting on part or whole of the spire.[3] Body whorl is somewhat constricted around the canal, which is not delimited by a ridge.[3] Aperture is oval, merging into a broad and short siphonal canal.[3] Outer lip is slightly thickened, smooth inside.[3] Parietal and columellar edge are appressed, forming a thin callus which hardly extends over the previous whorl.[3] Colour is whitish with diffuse, pale brown flames and blotches.[3]

Distribution

Distribution of Buccinum oblitum include:

This apparently disjunct distribution is puzzling, but no appreciable morphological difference can be detected.[3]

The type locality stated by Sykes (1911) is "Porcupine" 1869 sta. 65, which is North of the Hebrides, 61º10'N, 02º21'W, 345 fathoms.[3] The lectotype in USNM is reported (Bouchet & Warén, 1985, and current USNM calalogue) to be from sta. 55 which is 60º04'N, 06º19'W, 605 fathoms.[3]

Ecology

The type of larval development is direct (non-planktotrophic) inferred from paucispiral protoconch.[3]

References

This article incorporates CC-BY-SA-3.0 text from the reference.[3]

  1. ↑ Sykes E. R. (1911). "On the Mollusca procurred during the Porcupine expeditions. Supplemental notes IV." Proceedings of the Malacological Society of London 9: 331–348, 1 fig.
  2. ↑ Buccinum oblitum Sykes, 1911.  Retrieved through: World Register of Marine Species on 17 April 2010.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Fraussen, K.; Gofas, S. (2010). Buccinum oblitum Sykes, 1911. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138871 on 2010-10-03
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