Latouchella
Temporal range: 541–498.5 Ma Tommotian
A reconstruction of Latouchella costata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Helcionelloida
Order: Helcionelliformes
Family: Coreospiridae
Genus: Latouchella
Cobbold, 1921
Type species
Latouchella costata
Cobbold, 1921
Species

See text.

Synonyms
  • Archaeospira Yü 1979
  • Cambroconus Yu 1981
  • Gibbaspira He 1984
  • Huanglingella Chen et al. 1981
  • Hubeispira Yu 1981
  • Reticulatoconus
  • Uncinaspira He 1984
  • Yunanospira Yü 1979
  • Yunnanospira Jian 1980

Latouchella is an extinct genus of marine invertebrate animal, that is considered to be a mollusk and which may be a sea snail, a gastropod. It is a helcionellid from the Tommotian epoch of what is now Siberia. Its tightly coiled, spiral shell contains a number of low "walls" running up the front surface of the interior; these would have directed water currents within its shell. Between these walls are a series of furrows, parallel to the shell's aperture, giving casts of the internal structure the appearance of a railway line, with sleepers (created by furrows) tying together paired rails that run towards the apex of the shell.[1]

Description

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This genus had a curved, segmented shell, and it is often reconstructed as a snail-like creature.

Older taxonomy

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The taxonomy of the genus Latouchella was originally like this[citation needed]: class Helcionelloida, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae.

2005 taxonomy

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The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[2] categorizes Latouchella in the family Coreospiridae in the superfamilia Scenelloidea within the Paleozoic molluscs of uncertain systematic position.

Latouchella was a type genus in the family Latouchellidae Golikov & Starobogatov, 1989, however Latouchellidae is a synonym of Coreospiridae.[2]

2006-2007 taxonomy

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The 2006–2007 taxonomy of the genus Latouchella is like this[citation needed]: class Helcionelloida, subclass Archaeobranchia, order Helcionelliformes, superfamily Helcionelloidea, family Coreospiridae.

Species

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Species in the genus Latouchella include:

See also

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References

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  1. ^ Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.; Conway Morris, S (eds.). The Early Evolution of Metazoa and the Significance of Problematic Taxa. Cambridge University Press. pp. 157–177. ISBN 978-0-521-40242-2.
  2. ^ a b Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. ISBN 3-925919-72-4. ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278

Notes

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