| Hemisinidae Temporal range: Tithonian (Late Jurassic)–recent | |
|---|---|
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| Hemisinus brevis | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Superfamily: | Cerithioidea |
| Family: | Hemisinidae P. Fischer & Crosse, 1891 |
| Synonyms | |
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Hemisinidae is a family of snails in the superfamily Cerithioidea. [1] [2] They occur in freshwater and brackish environments [2] on all continents except Australia and Antarctica. [3]
There are five extant genera: [2]
There are also four genera only known from fossils: [2]
Dentaliida is one of the two orders of scaphopod mollusks, commonly known as elephant's tusk shells. The order Dentaliida contains most of the larger scaphopods, and is distinguished from the other order by the shape of its shell, the shape of the foot, and the arrangement of some of their internal organs.
Idiosepiidae, also known as the pygmy squids, is a family of squids in the superorder Decapodiformes. They are the smallest known squids.
Viviparidae, sometimes known as the river snails or mystery snails, are a family of large operculate freshwater snails, aquatic gastropod mollusks.
Patellidae is a taxonomic family of true limpets, marine gastropod molluscs in the superfamily Patelloidea. (The superfamily Patelloidea should not be confused with the similar-sounding genus of true limpets Patelloida which is in the family Lottiidae within the superfamily Lottioidea, also part of the Patellogastropoda.)
Hemistomia pusillior is a species of minute freshwater snail with an operculum, aquatic gastropod molluscs or micromolluscs in the family Tateidae. This species is endemic to Australia.
Plaxiphora is a genus of chitons in the family Mopaliidae. It is distributed in the Atlantic, Indian, and Pacific Oceans, primarily in the south-temperate and subantarctic regions.
Chamidae, common name the jewel boxes or jewel box clams, is a family of marine bivalve mollusks in the order Venerida.
Sigmurethra is a taxonomic category of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This is an informal group which includes most land snails and slugs.
The Cerithioidea is a superfamily of marine, brackish water and freshwater gastropod containing more than 200 genera. The Cerithoidea are included unassigned in the subclass Caenogastropoda. The original name of this superfamily was Cerithiacea, in keeping with common superfamily endings at the time.
Scutellastra mexicana is a species of true limpet, a marine gastropod mollusk in the family Patellidae. It is the largest known limpet in the world.
Mopaliidae is a family of marine molluscs in the class Polyplacophora.
Rangia is a genus of bivalve molluscs or clams in the subfamily Mactrinae of the family Mactridae.
Glyptemoda is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Helicinidae. It is endemic to Cuba. The genus is monotypic, the only species being Glyptemoda torrei(Henderson, 1909). However, two subspecies are recognized:
Euvola is a genus of marine bivalve mollusks in the family Pectinidae, the scallops. In shells of this genus, one valve is flat, and the other is deeply cupped.
Acanthocardia is a genus of saltwater clams, marine bivalve molluscs in the family Cardiidae. They are infaunal suspension feeders.
Meiocardia is a genus of bivalve.
After excluding groups not related, the informal group Sigmurethra has become the suborder Helicina, with the following infraorders and a collection of families with no superfamily:
Calliodentalium is a genus of scaphopodan molluscs. It is monotypic within the family Calliodentaliidae. It is known from the Atlantic, Indian, and Pacific Oceans.
Euvola vogdesi is a species of bivalve belonging to the family Pectinidae. The species is found on the Pacific Coast of North and Central America. Fossil specimens are known from Mexico and California.
Euthrenopsis bountyensis is a species of marine gastropod mollusc in the family Buccinidae. It was first described by Baden Powell in 1929. It is endemic to the waters of New Zealand.