Latouchella

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]

Latouchella
Temporal range: Tommotian
A reconstruction of Latouchella costata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: †Helcionelloida
Order: †Helcionelliformes
Family: †Coreospiridae
Genus: †Latouchella
Cobbold, 1921
Species

See text.

Description

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

Older taxonomy

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

2005 taxonomy

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

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

Species

Species in the genus Latouchella include:

  • Latouchella costata (type)
  • L. accordionata
  • L. adelocosma
  • L. adunca
  • L. alicae
  • L. arcuata
  • L. arguta
  • L. burlingi
  • L. dimicostata
  • L. holmdalense
  • L. iacobinica
  • L. korobokovi
  • L. merino
  • L. ostenfeldense
  • L. pearylandica
  • L. pocatelloensis
  • L. sonlingpoensis
  • L. taijiangensis
  • ? Latouchella memorabilis Missarzhevsky in Rozanov et al., 1969
  • ? Latouchella orientalis
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References
  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. 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
  • E.S. Cobbold. 1921. The Cambrian horizons of Comley (Shropshire) and their Brachiopoda, Pteropoda, Gasteropoda and etc. Quarterly Journal of the Geological Society of London 76:325-386
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