''Hauffenia'' sp. nov.

Hauffenia sp. nov.
Apertural view of a shell of Hauffenia from Slovakia
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda

clade Hypsogastropoda
clade Littorinimorpha

Superfamily: Rissooidea
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 mollusk in the family Hydrobiidae. This species is found in Slovakia.

Taxonomy

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]

Photo of apical view.
Photo of umbilical view.

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]

Ecology

This species lives in subterranean waters[5] and in springs.[2] This species is very rare.[4]

References

This article incorporates CC-BY-3.0 text from the reference[4]

  1. ↑ Šteffek J. (1996). "Hauffenia sp. nov.". 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.
  2. 1 2 Horsák M., Juřičková L. & Picka J. (2013). Měkkýši České a Slovenské republiky. Molluscs of the Czech and Slovak Republics. Kabourek, Zlín, 264 pp. p. 44-45 (in Czech and English).
  3. 1 2 Čejka T., Dvořák L., Horsák M. & Šteffek J. (2007). "Checklist of molluscs (Mollusca) in the Slovak Republic". Folia Malacologica 15(2): 49-58.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Šteffek J., Falniowski A., Szarowska M. & Grego J. (2011)."“Hauffenia” Pollonera, 1898 (Caenogastropoda: Hydrobiidae) in Slovakia: a preliminary report". Folia Malacologica 19(1): 1-7. PDF.
  5. 1 2 3 4 5 6 (in Czech) Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1-37. PDF.
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