Comitas rotundata

Comitas rotundata is a species of sea snail, a marine gastropod mollusc in the family Pseudomelatomidae.[1]

Comitas rotundata
Original image of a shell of Comitas rotundata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Pseudomelatomidae
Genus: Comitas
Species:
C. rotundata
Binomial name
Comitas rotundata
(Watson, 1881)
Synonyms[1]

Pleurotoma (Surcula) rotundata R.B. Watson, 1881 (original combination)

Description

(Original description) The shell is high, narrow, fusiform and conical. It has rounded whorls and a shallow suture, below which the inferior whorl swells out tumidly. The body whorl is short and rounded, with a constricted conical base and a long narrow aperture.

Sculpture: Longitudinals— there are strongish, close-set, rounded, hair-like lines of growth, specially strong below the suture. Spirals — over the whole surface are strong, but unequal, rather distant, sharpish threads. Those in the sutural area are, with two or three exceptions, weaker than those elsewhere. About three at the periphery are somewhat prominent.

The colour of the shell is porcelain-white under a thin yellow epidermis. The sutureis fine, superficial, but well defined. The aperture is club-shaped, being oval, with a long narrow siphonal canal below and a blunt angulation above. The outer lip is very evenly curved, but a little more steeply above than below.;It is drawn out into a long straight line along the side of the siphonal canal. The edge-line, on leaving the body, retreats very straight toward the left to the rather remote, wide, and openly rounded, but very deep sinus, between which and the body whorl lies an acute triangular shelf, while below is the very high shouldered and prominent lip. The inner lip is exceptionally narrow, but strong and marginated. It is very little concave at the junction of the body and the columella, which is long, narrow, and is cut off at the point with a long, little oblique, sharp, and scarcely twisted edge. [2]

Distribution

This species occurs in the Mid-Pacific, east of Japan.

gollark: Technically only PD, but whatever.
gollark: I use PID control in a bunch of flight control code for Minecraft. It works quite well.
gollark: I mean, you'd have to program it to or train it on those, but it isn't impossible.
gollark: Good, because neural networks are excellent at that.
gollark: But right now, at least, it isn't very capable of generally intelligent stuff, which is probably for the best.

References
  1. WoRMS (2015). Comitas rotundata. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433367 on 2017-02-04
  2. Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 under the command of Captain George S. Nares ... and the late Captain Frank Tourle Thomson, R.N.; Zoology vol. 15 (1886) This article incorporates text from this source, which is in the public domain.
  • R.B. Watson, 1886; Preliminary Report on the Scaphopoda and Gasteropoda collected by the H. M. S. Challenger during the years 1873–76; Journal of the Linnean Society of London vol. XV p. 399
  • A.W.B. Powell, 1966, 969. The family Turridae in the Indo-Pacific. Pt. 2. The subfamily Turriculinae. IndoPacific Mollusca 2 (10): 207-414
  • R.N. Kilburn, Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 3. Subfamily Borsoniinae; Ann. Natal Mus. Vol. 27(2), December 1986
  • Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
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