Parafossarulus
Encyclopedia
Parafossarulus is a genus
of freshwater snail
s with gill
s and an operculum
, an aquatic
prosobranch gastropod mollusks in the family
Bithyniidae
.
, but genus Parafossarulus is generally accepted for Asian species.
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 freshwater snail
Freshwater snail
A freshwater snail is one kind of freshwater mollusc, the other kind being freshwater clams and mussels, i.e. freshwater bivalves. Specifically a freshwater snail is a gastropod that lives in a watery non-marine habitat. The majority of freshwater gastropods have a shell, with very few exceptions....
s with gill
Gill
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water, afterward excreting carbon dioxide. The gills of some species such as hermit crabs have adapted to allow respiration on land provided they are kept moist...
s and an operculum
Operculum (gastropod)
The operculum, meaning little lid, is a corneous or calcareous anatomical structure which exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails...
, an 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...
prosobranch gastropod mollusks in the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
Bithyniidae
Bithyniidae
Bithyniidae is a family of small freshwater snails with an operculum, aquatic gastropod molluscs in the clade Littorinimorpha.Their minute shell is often colored. They are characterized by a calcareous operculum, a lobe on the upper surface of the neck. The ctenidium, the respiratory gill-comb, is...
.
Species
Species within the genus Parafossarulus include:- Parafossarulus crassitestaParafossarulus crassitestaParafossarulus crassitesta is an extinct species of freshwater snail with gills and an operculum, an aquatic prosobranch gastropod mollusk in the family Bithyniidae....
(Bröhmme, 1885) - Parafossarulus priscillae Girotti, 1972
- Parafossarulus manchouricusParafossarulus manchouricusParafossarulus manchouricus is a species of freshwater snail with gills and an operculum, an aquatic prosobranch gastropod mollusk in the family Bithyniidae.It is medically important as host for Clonorchis sinensis in East Asia....
Bourguignat - Parafossarulus striatulus Benson - type species
Taxonomy
Glöer (2002) reassigned two European extinct species of Parafossarulus into subgenus of the genus BithyniaBithynia (genus)
Bithynia is a genus of small freshwater snails with an operculum, aquatic prosobranch gastropod mollusks in the family Bithyniidae.The diploid chromosome number of Bithynia sp...
, but genus Parafossarulus is generally accepted for Asian species.