Latouchella

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
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]

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]

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^{[citation needed]}: class Helcionelloida, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae.

2005 taxonomy

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]

2006-2007 taxonomy

The 2006–2007 taxonomy of the genus Latouchella is like this^{[citation needed]}: 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

References

^ 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.
^ 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.
^ ^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

Gubanov, Alexander P.; Peel, John S.. Redescription of the type species of Latouchella Cobbold, 1921 (Mollusca) from the Lower Cambrian of Comley, England. GFF 1998 03.
Gubanov, Alexander P.; Peel, John S.. Oelandiella, the earliest Cambrian helcionelloid mollusc from Siberia. Palaeontology April 1999.
Brock, Glenn A.. Middle Cambrian molluscs from the southern New England Fold Belt, New South Wales, Australia. Geobios 1998.
Runnegar, Bruce; Jell, Peter A.. Australian Middle Cambrian molluscs and their bearing on early molluscan evolution. Alcheringa: An Australasian Journal of Palaeontology 1976 01.
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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[Peel1991-1] 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.

[Bouchet-3] 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

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