Leptothyra | |
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Leptothyra filifer shells | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Vetigastropoda |
Superfamily: | Phasianelloidea |
Family: | Colloniidae |
Subfamily: | Colloniinae |
Genus: | Leptothyra sensu Pease, 1869 [1] |
Type species | |
Leptothyra costataPease, 1869 synonyms_ref = [2] |
Leptothyra is a genus of sea snails, marine gastropod mollusks in the family Colloniidae. [2]
This genus was previously placed in the family Turbinidae.
The name Leptothyra is generally attributed to Pease (1869), and the name "Leptothyra Pease, 1869" is usually treated as a valid name for small colloniines. Although Leptothyra is a junior objective synonym of Homalopoma, the species usually treated as valid in that genus are provisionally listed in WoRMS under "Leptothyra sensu Pease, 1869", pending a taxonomic/nomenclatural reappraisal. [2]
LeptothyraJ. G. Cooper, 1867 is now considered a junior objective synonym of the genus Homalopoma Carpenter, 1864 [3]
The small, solid shell has a turbinate or globose shape. The operculum is multispiral with a subcentral nucleus and concave in the centre outside. The main character distinguishing Collonia from Leptothyra seems to be the peculiar peristome of the former. [4]
Species within the genus Leptothyra include:
Trochus is a genus of medium-sized to large, top-shaped sea snails with an operculum and a pearly inside to their shells, marine gastropod molluscs in the family Trochidae, the top snails.
Gibbula is a genus of small sea snails, marine gastropod molluscs in the subfamily Cantharidinae of the family Trochidae, the top snails.
Turbo is a genus of large sea snails with gills and an operculum, marine gastropod molluscs in the family Turbinidae, the turban snails.
Homalopoma, common name the dwarf turbans, is a genus of mostly very small sea snails with a calcareous operculum, marine gastropoda molluscs in the subfamily Colloniinae of the family Colloniidae.
Collonista verruca is a species of sea snail, a marine gastropod mollusc in the family Colloniidae.
Drillia is a genus of small sea snails, marine gastropod mollusks in the family Drilliidae.
Daphnella is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Mangelia is a large genus of sea snails, marine gastropod mollusks in the family Mangeliidae.
Homalopoma linnei is a species of sea snail, a marine gastropod mollusc in the family Colloniidae.
Collonista is a genus of sea snails in the family Colloniidae.
Euchelus is a genus of sea snails, marine gastropod mollusks in the family Chilodontaidae.
Monilea is a genus of sea snails in the family Trochidae, the top snails.
Melanella is a genus of very small ectoparasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.
Rissoina is a large genus of minute sea snails, marine gastropod mollusks or micromollusks, in the family Rissoinidae.
Eulima is a genus of small, ectoparasitic sea snails, marine gastropod mollusks in the family Eulimidae.
Cythara is a genus of sea snails, marine gastropod mollusks in the family Mangeliidae.
Collonia is a genus of small sea snails with calcareous opercula, marine gastropod mollusks in the family Colloniidae.
Homalopoma indutum, common name the two-faced dwarf turban, is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Colloniidae.
Triphora is a genus of very small sea snails, marine gastropod molluscs in the family Triphoridae. The genus was named by Blainville in 1828, and the type species is Triphora gemmata Blainville, 1828. Like most of the other genera in this family, the shells of species in this genus are extremely high-spired with sculptural decoration, and are sinistral (left-handed) in coiling.