Pyramidella alfredensis | |
---|---|
![]() | |
Drawing of a shell of Pyramidella alfredensis | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Heterobranchia |
Family: | Pyramidellidae |
Genus: | Pyramidella |
Species: | P. alfredensis |
Binomial name | |
Pyramidella alfredensis (Bartsch, 1915) | |
Synonyms [1] | |
|
Pyramidella alfredensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [1]
The milk-white shell has an elongate-conic shape. The 1¾ whorls of the protoconch are very small. They are planorboid, having their axis at right angles to that of succeeding turns. The left side of the nucleus projects considerably beyond the outline of the spire of the teleoconch . The ten whorls of the teleoconch are almost flat and are feebly shouldered at the summit. They are marked by exceedingly fine, retractive, incremental lines, and numerous microscopic spiral striations. The suture is moderately constricted. The periphery of the body whorl is well rounded. The base of the shell is well rounded, decidedly umbilicated, and marked like the spire. The aperture is subquadrate. The posterior angle is acute. The outer lip is thin. The inner lip is very oblique, and decidedly reflected. It is provided with a strong fold near its insertion. The parietal wall is glazed with a thin callus. [2]
This marine species occurs off Port Alfred, South Africa.
Haedropleura ima is a species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.
Agladrillia benjamini is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Orinella africana is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Polyspirella callista is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Longchaeus conicus is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Pyramidella magdalenensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Longchaeus mazatlanicus is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Pyramidella panamensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Pyrgiscus thielei is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola pyrrha is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Pyramidella tarpeia is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla almejasensis is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.
Turbonilla baegerti is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla cabrilloi is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla calvini is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla centrota is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla cortezi is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla carifa is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla histias is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Turbonilla macbridei is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.