Cyclophoridae Temporal range: | |
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Family Cyclophoridae. A Pterocyclos tenuilabiatus; B Pterocyclos amabilis C Leptopoma pellucidum; D Platyraphe bongaoensis; Broken aperture E Japonia trilirata/kinabaluensis species complex; F Japonia balabacensis | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Caenogastropoda |
Order: | Architaenioglossa |
Superfamily: | Cyclophoroidea |
Family: | Cyclophoridae Gray, 1847 |
Subfamilies | |
Synonyms | |
Alycaeidae Blanford, 1864 |
Cyclophoridae is a taxonomic family of small to large tropical land snails with an operculum, terrestrial gastropod mollusks in the order Architaenioglossa belonging to the subclass Caenogastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).
This diverse family with many species is now limited to the representatives in the tropics and subtropics of the Old and New World.
Their fossil history dates back through the Early Tertiary [1] to the Cenomanian age of the Cretaceous. [2]
The dextral shells are mostly of small and rarely medium size. The form of the shell varies from discoidal to turbinate. The round aperture is often modified, sometimes with an incision or a constriction. The last whorl can sometimes be disconnected and then extends strongly from the winding plane. The operculum is generally circular, which can be retracted deeply into the shell. Its form is multispiral and can be calcified or lacking calcareous overlay. The outer layer of the operculum can contain accessory deposits.
The head of the soft body ends in a short proboscis. The tentacles are round in cross-section, relatively long and taper to the end. The eyes are located at the base of the antenna on flat papillae. The longitudinal muscular foot is not divided. The mantle cavity acts as a lung cavity. The taenioglossan radula has seven elements per transverse row. The central row of the radula contains usually five, rarely three or seven teeth. The animals are dioecious.
This family consists of the following subfamilies according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005, which adapted the tribes of Cyclophorinae from the system used by Wenz (1938). [3] Thirty five genera containing approximately 810 species have been recognized as in 2008. [4]
Some notable genera are also listed here:
Cyathopoma is a genus of land snails with an operculum, a terrestrial gastropod mollusks in the family Cyclophoridae.
Omphalotropis is a genus of minute salt marsh snails with an operculum, terrestrial gastropod mollusks in the subfamily Omphalotropidinae of the family Assimineidae.
Tropidophora is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Pomatiidae.
Assimineidae is a family of minute snails, also known as palmleaf snails, with an operculum, gastropod mollusks or micromollusks in the superfamily Rissoidae. Many of these very small snails live in intermediate habitats, being amphibious between saltwater and land; others live in freshwater.
Diplommatinidae is a family of small land snails, also known as staircase snails, with an operculum, terrestrial gastropod mollusks in the superfamily Cyclophoroidea. The Cochlostomatinae Kobelt, 1902, were previously considered a subfamily of the Diplommatinidae, but are now known to be a separate family.
Cyclophoroidea is a superfamily of land snails with an operculum, terrestrial gastropods within the informal group Architaenioglossa, that belongs to the clade Caenogastropoda.
Pupinidae is a taxonomic family of land snails with an operculum, terrestrial gastropod mollusks in the superfamily Cyclophoroidea.
Megalomastomatidae is a family of tropical land snails with an operculum, terrestrial gastropod mollusks in the superfamily Cyclophoroidea.
Neocyclotidae is a family of tropical land snails with gills and an operculum, terrestrial gastropod mollusks in the informal group Architaenioglossa belonging to the clade Caenogastropoda.
The family Pomatiidae is a taxonomic family of small operculate land snails, terrestrial gastropod mollusks that can be found over the warmer parts of the Old World. In the older literature, this family is designated as Pomatiasidae.
Cyclophorus is a genus of operculate land snails, terrestrial gastropod mollusks in the family Cyclophoridae.
Cyclotus is a genus of tropical land snails in the subfamily Cyclophorinae of the family Cyclophoridae.
Lagocheilus is a genus of gastropods in the family Cyclophoridae.
Pterocyclos is a genus of tropical land snails in the subfamily Cyclophorinae of the family Cyclophoridae.
Scabrina is a genus of operculate land snails, terrestrial gastropod mollusks in the subfamily Cyclophorinae of the family Cyclophoridae.