Hauffenia sp. nov.
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| Hauffenia sp. nov. | |
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| Apertural view of a shell of Hauffenia from Slovakia | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Hydrobiidae |
| Genus: | Hauffenia |
| Species: | H. sp. nov. |
| Binomial name | |
| Hauffenia sp. nov. | |
Hauffenia sp. nov. is an as yet undescribed (in 2013)[2] species of freshwater snail that lives underground, an aquatic gastropod mollusc in the family Hydrobiidae. This species is found in Slovakia.
The genus Hauffenia is taxonomically problematic.[3]
Šteffek et al. (2011)[4] confirmed that the snail from Slovakia appears to belong to the genus Hauffenia, based on the morphology of the penial characters.[4]
However, molecular phylogeny research based on sequences of mitochondrial cytochrome-c oxidase I (COI) genes appears to demonstrate that although these snails belong to the family Hydrobiidae, they are not closely related to the genus Hauffenia.[4]
These snails from Slovakia may actually represent not one species but two genera: Hauffenia and Lobaumia.[4]
Specimens of this species are preserved in private collections.[3]
Distribution
This species is endemic to Slovakia.[5] It lives only in the Slovak Karst, where it was discovered in the 1980s.[5]
The former (subrecent) distribution of this species included also Miličské travertíny travertines near Banská Bystrica.[5]
Description
The shape of the shell is valvatiform. The shell is thin-walled and glossy.[4] The shell has 2–2.5 rapidly but regularly growing whorls.[4] The spire is low or very low.[4] The umbilicus is very wide, with the earlier whorls visible inside.[4] The teleoconch is very finely sculptured with weakly marked growth lines.[4] The protoconch has about 1¼ whorls growing slowly; the border between the proto- and teleoconch is indistinct; the protoconch surface is nodular.[4]
The width of the shell is up to 1.2 mm[5] or up to 1.8 mm.[4] The height of the shell is up to 0.8 mm[5] or up to 0.9 mm.[4]
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The animal has no body pigment and no eyes.[4]
The sexes are distinct (females and males occur). Reproductive system: The penis is broad and blunt, has a weakly marked lateral lobe on its left side near the apex, a very small stylet, a penial duct running in a zigzag, and no visible trace of an ejaculatory duct.[4] The female reproductive organs are of Hauffenia-type.[4]