Compsodrillia petersoni

Last updated

Compsodrillia petersoni
Compsodrillia petersoni 001.jpg
Original image of a shell of Compsodrillia petersoni
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Pseudomelatomidae
Genus: Compsodrillia
Species:
C. petersoni
Binomial name
Compsodrillia petersoni
Bartsch, 1934

Compsodrillia petersoni is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae. [1]

Contents

Description

The length of the shell attains 28 mm, its diameter 6.7 mm.

(Original description) The very elongate-conic shell is bluish white. The protoconch contains 2.5 whorls, the first two well rounded, smooth, the last half crossed by a number of distantly spaced axial riblets. The postnuclear whorls are well rounded, the first with two nodulose spiral threads, the second with three, of which the median is the strongest. These remain throughout the length of the shell. In addition to this the appressed summit of the shell appears as a spiral cord. The posterior sinus is narrow and located immediately below the spiral cord at the summit. In addition to the strong spiral cords finer spiral threads are present both in the sinal sulcus near the summit and on and between the ribs anterior to this. In addition to the spiral sculpture the whorls are marked by axial ribs which have their beginning in the nodulose spiral threads on the first postnuclear whorl. These axial ribs are slightly protractively slanting. They extend but very slightly posteriorly to the posterior sulcus, and evanesce anteriorly on the base of the body whorl. They are more than twice the width of the spaces that separate them. Of these, 10 occur upon the first to seventh, 12 upon the eighth to tenth, and 14 upon the body whorl. These ribs and the spaces that separate them are marked by lines of growth, which also extend across the posterior sulcus and over the base and columella and give to the general surface a finely reticulated clothlike sculpture. The suture is slightly impressed. The base of the shell is well rounded, marked by four strong nodulose spiral cords like the spire and the intervening spiral threads. The columella is rather long, twisted, with an obscure indication of an umbilicus at its tip, marked by seven strong, broad, rounded, very nodulose spiral cords, and six slender threads on the anterior tip. Between and on the strong cords on the columella finer threads are present. The aperture is rather long, strongly channeled anteriorly and posteriorly, the posterior channel almost forming a tube, since the outer lip and the parietal callus bend forward, partly closing it. The outer lip bears a strong varix one fifth of a turn behind its edge, and beyond this is drawn into a clawlike element, which bends in very slightly toward the aperture. The inner lip is strongly developed and projects considerably beyond the columella and extends as a rather thickened callus over the parietal wall, forming a decided knob at the termination of the posterior angle of the aperture. [2]

Distribution

This species occurs in the Caribbean Sea off Puerto Rico.

Related Research Articles

Polystira florencae is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.

Compsodrillia disticha is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae.

<i>Compsodrillia nana</i> Species of gastropod

Compsodrillia nana is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae.

<i>Douglassia enae</i> Species of gastropod

Douglassia enae is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.

<i>Fenimorea janetae</i> Species of gastropod

Fenimorea janetae, common name Janet's turrid, is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.

<i>Vexillum exaratum</i> Species of gastropod

Vexillum exaratum is a species of small sea snail, marine gastropod mollusk in the family Costellariidae, the ribbed miters.

<i>Odostomia acrybia</i> Species of gastropod

Odostomia acrybia is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia dicella</i> Species of gastropod

Odostomia dicella is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia excelsa</i> Species of gastropod

Odostomia excelsa is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia ovata</i> Species of gastropod

Odostomia ovata is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia torrita</i> Species of gastropod

Odostomia torrita is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia zeteki</i> Species of gastropod

Odostomia zeteki is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla adaba</i> Species of gastropod

Turbonilla adaba is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Darbya lira</i> Species of gastropod

Darbya lirai is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

<i>Mangelia minuscula</i> Species of gastropod

Mangelia minuscula is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

<i>Mangelia nisga</i> Species of gastropod

Mangelia nisga is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

Vexillum bancalanense is a species of sea snail, a marine gastropod mollusk, in the family Costellariidae, the ribbed miters.

<i>Zebinella allemani</i> Species of gastropod

Zebinella allemani is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoinidae.

<i>Zebinella barthelowi</i> Species of gastropod

Zebinella barthelowi is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoinidae.

<i>Alvania nemo</i> Species of gastropod

Alvania nemo is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.

References