Latouchella (original) (raw)

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Extinct genus of molluscs

_Latouchella_Temporal range: 541–498.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N Tommotian
A reconstruction of Latouchella costata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: †Helcionelloida
Order: †Helcionelliformes
Family: †Coreospiridae
Genus: †LatouchellaCobbold, 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]

It was named by Edgar Sterling Cobbold in 1921 for the Rev. William Martin Digues La Touche of Wistanstow, Shropshire, England, in whose collection it was found.[2]

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

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

The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[3] 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.[3]

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

Species in the genus Latouchella include:

  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. ^ Cobbold, E. S. (1921). "The Cambrian Horizons of Comley (Shropshire) & their Brachiopoda, Pteropoda, Gasteropoda". The Quarterly Journal of the Geological Society of London. 76. The Geological Society of London: 366. Retrieved 29 September 2024.
  3. ^ 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