| Tomichia cawstoni | |
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| Species: | T. cawstoni |
| Binomial name | |
| Tomichia cawstoni Connolly, 1939 | |
Tomichia cawstoni is a species of very small freshwater snails which have a gill and an operculum, gastropod mollusks or micromollusks in the family Tomichiidae.
This species is endemic to South Africa. [1] The type locality is Kokstad, KwaZulu-Natal, Eastern Cape Province, South Africa. [2]
The width of the shell is 2.5 mm.; the height of the shell is 4.6 mm. Spire short, and flat sided. Whorls weakly convex. [2]
The natural habitat for this species is rivers in riverine forests, predominantly of freshwater in contrast to other species which inhabit ephemeral streams and rivers. [1] [3]
Species of the genus Tomichia are particularly susceptible to changes in their ecosystem, and thus species such as Tomichia cawstoni are greatly threatened by pollution and climatic changes (especially in the form of changes in rain cycles). In Kokstad, it is threatened by pollution and trampling from commercial cattle farming operations. All suitable locations for this species' inhabitance have since been found destroyed, restricting the species to the type locality.
Fluvidona anodonta or more commonly known as the North Pine River freshwater snail is a species of minute freshwater snail that is endemic to Australia. Originally discovered in 1892 by Hedley & Musson, the snail is highly elusive and only has been sighted four times since its discovery. The snail is 2 mm long and 1 mm wide with the shell colouring being of a yellow-whiteish shade. Fluvidona anodonta resides within the City of Moreton Bay, specifically in four river systems within the D'Aguilar National Park, Queensland. The four river systems are the South Pine River headwaters, the North Pine River headwaters, Kobble Creek and Low Branch Creek. The snail is found under deeply submerged rocks within permanent freshwater systems.
Bathanalia howesi is a species of tropical freshwater snail with an operculum, aquatic gastropod mollusk in the family Paludomidae.
Chytra kirki is a species of tropical freshwater snail with an operculum, aquatic gastropod mollusk in the family Paludomidae.
The Cahaba pebblesnail, scientific name Clappia cahabensis, is a species of very small freshwater snail, aquatic gastropod mollusks in the family Lithoglyphidae.
Lanistes nyassanus is a species of large freshwater snail, an aquatic gastropod mollusk with a gill and an operculum in the family Ampullariidae, the apple snails. The shell of this species is unusual in that it has left-handed shell-coiling.
Limnotrochus is a monotypic genus in the family Paludomidae containing the single species Limnotrochus thomsoni, a tropical freshwater snail with gills and an operculum, aquatic gastropod mollusk. It is endemic to Lake Tanganyika.
Paramelania iridescens is a species of tropical freshwater snail with an operculum, aquatic gastropod mollusk in the family Paludomidae.
Theodoxus maresi is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk in the family Neritidae the nerites.
Theodoxus numidicus is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk in the family Neritidae, the nerites.
Tiphobia horei is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Paludomidae.
Tomichia natalensis is a species of very small freshwater snails which have a gill and an operculum, gastropod mollusks or micromollusks in the family Tomichiidae.
Tomichia rogersi is a species of very small freshwater snails which have a gill and an operculum, gastropod mollusks or micromollusks in the family Tomichiidae.
Neritina pulligera, common name the dusky nerite, is a species of freshwater snail, a gastropod mollusk in the family Neritidae.
Tomichia tristis is a species of very small freshwater or brackish snail with a gill and an operculum, gastropod mollusk or micromollusk in the family Tomichiidae.
Tomichia is a genus of very small freshwater snails which have a gill and an operculum, gastropod mollusks or micromollusks in the family Tomichiidae.
Theodoxus meridionalis is a species of freshwater snail with a gill and an operculum. It is an aquatic gastropod mollusk in the family Neritidae, the nerites.
Bulinus abyssinicus is a species of tropical freshwater snail with a sinistral shell, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails and their allies.
Bulinus jousseaumei is a species of tropical freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails and their allies. Like other planorbids, the shell of the species is sinistral in coiling.
Bulinus nasutus is a species of tropical freshwater snail with a sinistral shell, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails and their allies.
Tomichia differens / T. differens is a species of freshwater gastropod in the family Tomichiidae endemic to perennial streams and rivers in Western Cape Province, South Africa. Described by Connolly in 1939, T. differens is found in two sites at De Kelders and Stilbaai, and has amphibious habits and a tolerance of slight salinity and desiccation throughout its habitats. The genus Tomichia is very sensitive to changes in ecosystem conditions, and thus are threatened by pollution and climate change. The Stilbaai site is in danger of becoming uninhabitable due to residential developments and offshore drilling operations, and thus this species has been listed as Endangered by the IUCN.
