Discosauriscus
Encyclopedia
Discosauriscus was a small reptiliomorph that lived in Central and Western Europe in the Lower Permian
Permian
The PermianThe term "Permian" was introduced into geology in 1841 by Sir Sir R. I. Murchison, president of the Geological Society of London, who identified typical strata in extensive Russian explorations undertaken with Edouard de Verneuil; Murchison asserted in 1841 that he named his "Permian...

 Period. Its best fossils have been found in Boskovice Furrow
Boskovice
Boskovice is a town in the Czech Republic.-Location:The town is situated in the Drahanská Highlands, about 30–40 km to the north of Brno, the most important city of Moravia.-History:...

, in the Czech Republic
Czech Republic
The Czech Republic is a landlocked country in Central Europe. The country is bordered by Poland to the northeast, Slovakia to the east, Austria to the south, and Germany to the west and northwest....

.

Classification

Discosauriscus belongs in alternative classifications to the order Anthracosauria
Anthracosauria
Anthracosauria is an order of extinct reptile-like amphibians that flourished during the Carboniferous and early Permian periods, although precisely which species are included depends on one's definition of the taxon.-Various definitions:...

 or Seymouriamorpha
Seymouriamorpha
Seymouriamorpha were a small but widespread group of reptiliomorphs. Many seymouriamorphs were terrestrial or semi-aquatic. However, aquatic larvae bearing external gills and grooves from the lateral line system has been found, making them unquestionably amphibians. The adults were terrestrial...

, and is the type genus
Type genus
In biological classification, a type genus is a representative genus, as with regard to a biological family. The term and concept is used much more often and much more formally in zoology than it is in botany, and the definition is dependent on the nomenclatural Code that applies:* In zoological...

 of the family Discosauriscidae
Discosauriscidae
Discosauriscidae is a family of reptiliomorphs of the early Permian group Seymouriamorpha....

. Currently recognised are two valid species - Discosauriscus austriacus and Discosauriscus pulcherrimus. Letoverpeton is a junior synonym of Discosauriscus.

Characteristics

Discosauriscids are only known from larva
Larva
A larva is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle...

l or neotenic forms, and three ontogenetic stages can be distinguished. Discosauriscus had wide jaws with sharp teeth, short limbs and relatively long tail. The phalangeal formula was 2-3-4-5-3 for both hind- and forelimbs. The body was covered with rounded scales with concentric rings, and a well preserved lateral-line system has been described.

Discosauriscus may have had electroreceptive organs.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK