| Spergo | |
|---|---|
 | |
| Shell of Spergo fusiformis | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Superfamily: | Conoidea |
| Family: | Raphitomidae |
| Genus: | Spergo Dall, 1895 |
| Type species | |
| Mangilia glandiniformis Dall, 1895 | |
| Species | |
See text | |
| Synonyms [1] | |
| |
Spergo is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. [1]
The large, thin shell is nearly destitute of sculpture. It shows an unrecurved columella, a short, wide, straight siphonal canal, a wide shallow emargination representing the anal notch, and generally feeble anal fasciole, except in the very young. There is a sharp outer lip, unarmed aperture, and a sinusigera protoconch.
The animal has a muzzle formed by a stout squarely truncated rostrum opening into a capacious pharynx, provided internally with a degenerate proboscis not capable of extrusion beyond the oral orifice, with a poison gland and a degenerate radula. Eyes are present and functional. The tentacles are low-seated, stout, and clavate. The operculum is absent. The dentition resembles that of Bela.
This form resembles Pleurotomella , Verrill, from which it differs in the character of the rostrum and pharynx, in the possession of eyes, in its straight wide siphonal canal, and in having a feebler type of verge, anal notch and fasciole. [2]
Species within the genus Spergo include:
Glyptaesopus phylira is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.
Spergo sibogae is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Aforia crebristriata is a species of sea snail, a marine gastropod mollusk in the family Cochlespiridae.
Spergo aithorrhis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Spergo fusiformis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Cryptogemma praesignis is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.
Agladrillia plicatella is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Calliclava alcmene is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Calliclava palmeri is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Clathrodrillia orellana is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Mangeliidae is a monophyletic family of small to medium-sized, predatory sea snails, marine gastropod mollusks in the superfamily Conoidea.
Cryptogemma is a genus of sea snails, marine gastropod mollusks in the family Turridae, the turrids.
Phymorhynchus is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Pontiothauma is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Rimosodaphnella is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Horaiclavus is a genus of sea snails, marine gastropod mollusks in the family Horaiclavidae.
Antiplanes is a genus of sea snails, marine gastropod mollusks in the family Pseudomelatomidae,.
Gymnobela is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.
Cerodrillia cratera is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
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