| Usilla avenacea | |
|---|---|
 | |
| Shell of Usilla avenacea (syntype at MNHN, Paris) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Muricidae |
| Subfamily: | Ergalataxinae |
| Genus: | Usilla |
| Species: | U. avenacea |
| Binomial name | |
| Usilla avenacea (Lesson, 1842) | |
| Synonyms [1] | |
| |
Usilla avenacea is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails. [1]
(Described as Vexilla fusconigra) The shell is abbreviately fusiform, ventricose, solid. The spire is moderately produced, acute, and less than half the length of the shell. The shell contains six whorls, convex, furnished with close transverse granular ribs. The suture is impressed. The body whorl is large, ventricose, and marked with coarse, remote, revolving impressed lines, and fine longitudinal striae and wrinkles. The siphonal canal is short and slightly recurved. The aperture is oblong-ovate. The outer lip is thick, somewhat dilated, and furnished with six or seven intramarginal tubercular teeth, sinuated at its junction with the body whorl. The columella-lip is smooth, flattened, slightly callous above.
The colour of the shell is black or brownish-black. The impressed lines on the body-whorl have a light chocolate colour. The lips are purplish-brown. The teeth are white or bluish.
Animal. — The foot is oblong, truncated in front and rounded behind. The tentacles taper cylindrically. The eyes are lateral and sessile, at about two-thirds of the length of the tentacles. The siphon is long. Colour of the animal: dark greenisb-slate, and closely punctured with black and white. The tentacles are zoned witb brown. The tips are white. [2]
This marine species occurs off French Polynesia and Hawaii.
Gonospira bourguignati is a species of air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Streptaxidae.
Crassispira chazaliei is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae.
Famelica mirmidina is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Famelica monotropis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Neopleurotomoides callembryon is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Scutellastra flexuosa is a species of sea snail, a true limpet, a marine gastropod mollusc in the family Patellidae, one of the families of true limpets.
Peristernia tulipa is a species of sea snail, a marine gastropod mollusk in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.
Nassarius concinnus is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the nassa mud snails or dog whelks.
Nassarius oneratus, common name the loaded nassa, is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the nassa mud snails or dog whelks.
Emarginula costulata is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.
Emarginula decorata is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.
Turbo jourdani, common name the Jourdan's turban, is a species of sea snail, marine gastropod mollusk in the family Turbinidae.
Strigatella litterata is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.
Homalocantha anatomica is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Steromphala adansonii is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Cerithium zebrum is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae.
Calliotrochus marmoreus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Phorcus sauciatus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. It is native to the Eastern North Atlantic Ocean off the coast of Macaronesia and the Iberian Peninsula.
Ethminolia eudeli is a species of sea snail, a marine gastropod mollusk, in the subfamily Umboniinae of the family Trochidae.
Leptoconchus lamarckii is a species of sea snail, a marine gastropod mollusk, in the family Muricidae, the murex snails or rock snails.
This article incorporates text from this source, which is in the public domain .