Neoplanorbis
Encyclopedia
Neoplanorbis is a genus
of small, freshwater, air-breathing snail
s. They are aquatic
pulmonate gastropod mollusks in the family Planorbidae
, the ram's horn snails.
Neoplanorbis is the type genus
of the subfamily Neoplanorbinae.
in 1906.
Note that Pilsbry described the shell as if it were dextral, whereas planorbids are now known to be sinistral in shell coiling. In other words what Pilsbry describes as the "impressed and turned in" apex of the shell is actually the center of the umbilicus.
Pilsbry's original text (the original description) reads as follows:
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of small, freshwater, air-breathing snail
Snail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...
s. They are aquatic
Aquatic animal
An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...
pulmonate gastropod mollusks in the family Planorbidae
Planorbidae
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks....
, the ram's horn snails.
Neoplanorbis is the type genus
Type genus
In biological classification, a type genus is a representative genus, as with regard to a biological family. The term and concept is used much more often and much more formally in zoology than it is in botany, and the definition is dependent on the nomenclatural Code that applies:* In zoological...
of the subfamily Neoplanorbinae.
Species
The genus includes the following species:- † Neoplanorbis carinatusNeoplanorbis carinatus† Neoplanorbis carinatus was a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.This species was endemic to the United States. It is now extinct....
Walker, 1908 - † Neoplanorbis smithiNeoplanorbis smithiNeoplanorbis smithi was a species of freshwater snail, a gastropod in the Planorbidae family. It was endemic to the United States. It is now extinct....
Walker, 1908 - Neoplanorbis tantillusNeoplanorbis tantillusNeoplanorbis tantillus is a species of very small air-breathing freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails. This species is endemic to the United States....
Pilsbry, 1906 - Critically Endangered, the type species - † Neoplanorbis umbilicatusNeoplanorbis umbilicatus† Neoplanorbis umbilicatus was a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.This species was endemic to the United States. It is now extinct....
Walker, 1908
Original description
Genus Neoplanorbis was originally described by Henry Augustus PilsbryHenry Augustus Pilsbry
Henry Augustus Pilsbry was an American biologist, malacologist and carcinologist, among other areas of study. He was a dominant presence in many fields of invertebrate taxonomy for the better part of a century...
in 1906.
Note that Pilsbry described the shell as if it were dextral, whereas planorbids are now known to be sinistral in shell coiling. In other words what Pilsbry describes as the "impressed and turned in" apex of the shell is actually the center of the umbilicus.
Pilsbry's original text (the original description) reads as follows: