''Neoplanorbis'' is a
genus of small, freshwater, air-breathing
snails. They are
aquatic pulmonate
Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includ ...
gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda ().
This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...
mollusks in the family
Planorbidae, the ram's horn snails.
''Neoplanorbis'' is the
type genus of the subfamily Neoplanorbinae.
The shells of species in this genus appear to be dextral in coiling, but as is the case in all planorbids, the shell is actually sinistral. The shell is carried upside down with the aperture on the right, and this makes it appear to be dextral.
Species
The genus ''Neoplanorbis'' includes the following species:
* † ''
Neoplanorbis 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
Ex ...
'' Walker, 1908
* † ''
Neoplanorbis smithi
†''Neoplanorbis smithi'' was a species of small freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails. This species was endemic to the United States; it is now extinct
Extinction is the terminati ...
'' Walker, 1908
* † ''
Neoplanorbis tantillus
''Neoplanorbis tantillus'' is a species of very small air-breathing freshwater snail, an aquatic animal, aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails. This species is Endemism, endemic to the United States. In 2012 ...
'' Pilsbry, 1906
[Cordeiro, J. & Perez, K. 2012. Neoplanorbis tantillus. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. . Downloaded on 20 October 2012.] the type species
* † ''
Neoplanorbis umbilicatus'' Walker, 1908
Original description
Genus ''Neoplanorbis'' was originally described by
Henry Augustus Pilsbry
Henry Augustus Pilsbry (7 December 1862 – 26 October 1957) 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 centu ...
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:
References
{{Taxonbar, from=Q3078403
Planorbidae
Taxonomy articles created by Polbot