Balea heydeni
| Balea sarsii | |
|---|---|
 |
|
| Apertural view. | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): |
clade Heterobranchia
clade Euthyneura |
| Superfamily: | Clausilioidea |
| Family: | Clausiliidae |
| Genus: | Balea |
| Species: | B. sarsii |
| Binomial name | |
|
Balea sarsii Pfeiffer, 1847 |
|
| Synonyms | |
|
Balea heydeni (Maltzan, 1881) |
|
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
Balea heydeni (Maltzan, 1881)
Balia lucifuga Bourguignat, 1857
Balea sarsii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Clausiliidae.
The species has long been overlooked because of confusion with Balea perversa.
The specific name sarsii is in honour of Norwegian biologist Michael Sars.
According to Welter-Schultes Balea heydeni is conspecific with Balea sarsii. The name heydenii has now been superseded as the species was described from Norway at an earlier date than von Maltzan, under the name sarsii Pfeiffer (synonym lucifuga Bourguignat 1857).
This species has been separated from the closely related, common and wide-spread Balea perversa and redescribed by Gittenberger et al. (2006) under its junior synonym name Balea heydeni von Maltzan, 1881. The valid name for this taxon is, however, Balea sarsii.
Balea sarsii is a western-Atlantic element, found on the Atlantic Islands, in Portugal, northwestern Spain, and the coastal parts of France, Belgium and the Netherlands. In Britain and Ireland it is the commoner of the two Balea species, occurring also in the inland. The only locality in Denmark is Møns Klint. A recently undertaken revision of Balea-material from Sweden and Norway in the Göteborg Natural History Museum and the Swedish Museum of Natural History in Stockholm revealed two localities for Balea sarsii from the Swedish west coast (the Island of Vinga outside Göteborg and the Island Storön in the archipelago of Väderöarna in the province of Bohuslän). Totally the species is now known from six Norwegian localities, of which five are situated in Hordaland County. It is considered a very rare species in Norway, because only sixteen Norwegian specimens have been found, among thousands of Balea perversa.
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Wikipedia