Latouchella
Encyclopedia
Latouchella is an extinct genus of helcionellid
from the Tommotian epoch of what is now Siberia
. Itt tightly-coiled, spiral sheell contains a numer of low "walls" running up its front surface; 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.
-like creature.
, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae.
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
.
, subclass Archaeobranchia, order Helcionelliformes, superfamily Helcionelloidea, family Coreospiridae
.
Helcionellid
The Helcionellids are fossil shells of very small marine mollusks that are preserved as shells. These animals are first found about in the late Nemakit-Daldynian age, which is the earliest part of the Cambrian period. A single species persisted to the Early Ordovician...
from the Tommotian epoch of what is now Siberia
Siberia
Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...
. Itt tightly-coiled, spiral sheell contains a numer of low "walls" running up its front surface; 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.
Description
This genus had a curved, segmented shell, and it is often reconstructed as a snailSnail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...
-like creature.
Older taxonomy
The taxonomy of the genus Latouchella was originally like this: class HelcionelloidaHelcionelloida
Helcionelloida is the name given to an extinct group of ancient molluscs . These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991.-Anatomy:These animals were...
, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae.
2005 taxonomy
The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...
categorizes Latouchella in the family Coreospiridae
Coreospiridae
Coreospiridae is an extinct family of Paleozoic molluscs of uncertain position taxonomically. They might be snails or they might be monoplacophorans, Gastropoda or Monoplacophora.- 2005 taxonomy :...
in the superfamilia Scenelloidea
Scenelloidea
Scenelloidea is an extinct superfamily of paleozoic molluscs of uncertain position .- Families :Based on the taxonomy of the Gastropoda by Bouchet & Rocroi families in the Scenelloidea include:* † Scenellidae...
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
Coreospiridae
Coreospiridae is an extinct family of Paleozoic molluscs of uncertain position taxonomically. They might be snails or they might be monoplacophorans, Gastropoda or Monoplacophora.- 2005 taxonomy :...
.
2006-2007 taxonomy
The 2006-2007 taxonomy of the genus Latouchella is like this: class HelcionelloidaHelcionelloida
Helcionelloida is the name given to an extinct group of ancient molluscs . These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991.-Anatomy:These animals were...
, subclass Archaeobranchia, order Helcionelliformes, superfamily Helcionelloidea, family Coreospiridae
Coreospiridae
Coreospiridae is an extinct family of Paleozoic molluscs of uncertain position taxonomically. They might be snails or they might be monoplacophorans, Gastropoda or Monoplacophora.- 2005 taxonomy :...
.
Species
Specie sin the genus Latouchella include:- Latouchella costata (typeType speciesIn biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...
) - 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