Species
Species within the genus Dimorphoptychia include:
 | This section needs expansion. You can help by adding to it.(March 2011) |
| Dimorphoptychia | |
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| Genus: | † Dimorphoptychia Sandberger, 1871 [2] |
Dimorphoptychia is an extinct genus of land snails with an operculum, terrestrial gastropod mollusks in the family Helicinidae. [3]
Dimorphoptychia is the type genus of the subfamily Dimorphoptychiinae, which is likewise fully extinct today. [3]
Species within the genus Dimorphoptychia include:
| | This section needs expansion. You can help by adding to it.(March 2011) |
The gastropods, commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda.
Strombidae, commonly known as the true conchs, is a taxonomic family of medium-sized to very large sea snails in the superfamily Stromboidea, and the Epifamily Neostromboidae. The term true conchs, being a common name, does not have an exact meaning. It may refer generally to any of the Strombidae but sometimes is used more specifically to include only Strombus and Lambis. The family currently includes 26 extant, and 10 extinct genera.
Strepsodiscus is an extinct genus of very primitive fossil snail-like molluscs from the early part of the Late Cambrian of North America. The coiled, slightly asymmetrical shells are about 3 cm in height. It is not known whether these are shells of gastropods or monoplacophorans, which are more primitive mollusks.
The operculum, meaning little lid, is a corneous or calcareous anatomical structure like a trapdoor which exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails; the structure is found in some marine and freshwater gastropods, and in a minority of terrestrial gastropods, including the families Helicinidae, Cyclophoridae, Aciculidae, Maizaniidae, Pomatiidae, etc.
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell.
Pupillidae is a family of mostly minute, air-breathing, land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the superfamily Pupilloidea.
Endodontidae is a taxonomic family of very small air-breathing land snails and slugs, terrestrial pulmonate gastropod mollusks in the superfamily Punctoidea.
Draparnaudia is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Partuloidea.
Gibbus is an extinct genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Streptaxidae.
Euconulidae is a taxonomic family of minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the superfamily Trochomorphoidea.
Proserpinidae is a taxonomic family of small land snails with an operculum, marine gastropod mollusks in the superfamily Helicinoidea.
Aillyidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the informal group Sigmurethra.
Micractaeon koptawelilensis is a species of land snail, terrestrial gastropod mollusks in the superfamily Achatinoidea.
Tylostomatidae is an extinct family of fossil sea snails, marine gastropod molluscs in the superfamily Stromboidea, the true conchs and their allies.
Dialidae, common name dialids, is a family of sea snails, marine gastropod molluscs in the clade Sorbeoconcha.
Diastomatidae is a family of sea snails, marine gastropod molluscs in the superfamily Cerithioidea.
†Nerrhenidae is an extinct taxonomic family of fossil sea snails, marine gastropod mollusks. Nerrhenidae is the only family in the superfamily Nerrhenoidea.
Parafossarulus crassitesta is an extinct species of freshwater snail with gills and an operculum, an aquatic prosobranch gastropod mollusk in the family Bithyniidae.
Fluminicola nuttallianus, common name dusky pebblesnail, is a possibly extinct species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Lithoglyphidae.
Europrotomus is an extinct genus of fossil sea snails, true conches, marine gastropod mollusks in the family Strombidae, the true conchs.
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