| Prosipho antarctidis | |
|---|---|
 | |
| Shell of Prosipho antarctidis (specimen at the Smithsonian Institution) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Prosiphonidae |
| Genus: | Prosipho |
| Species: | P. antarctidis |
| Binomial name | |
| Prosipho antarctidis (Pelseneer, 1903) | |
| Synonyms | |
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Prosipho antarctidis is a species of sea snail, a marine gastropod mollusk in the family Prosiphonidae, the true whelks. [1]
(Described in German as Prosipho similis) This shell measuries 7.5 mm high and 3 mm wide, and consists of 6 whorls. The first 1.5 whorls are smooth, relatively large, and rounded. The remaining whorls are covered with strong spiral ridges. Typically, four ridges are visible on each whorl, with a weaker one sometimes appearing below the suture on the lower whorls. The body whorl has a ridge where the suture attaches, along with several other more or less distinct ridges on the underside and the relatively short, straight siphonal canal. The shell as a whole is tall and turreted, with whorls that are rounded and increase in size uniformly. The aperture is oval with a fairly short siphonal canal.
The radula has a central plate that is longer than it is wide, with three equally sized, pointed teeth that span its entire width. The lateral plates have a moderately wide cutting edge with five cusps. The three middle cusps are larger than the ones at the ends. The base of the lateral plate extends outward and forward into a fairly long process. [2]
This species was found at Cape Colbeck, Ross Sea, Antarctica.
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