Nectridea
Encyclopedia
Nectridea is an extinct order of lepospondyl
Lepospondyli
Lepospondyli are a group of small but diverse Carboniferous to early Permian tetrapods. Six different groups are known, the Acherontiscidae, Adelospondyli, Aïstopoda, Lysorophia, Microsauria and Nectridea, and between them they include newt-like, eel- or snake-like, and lizard-like forms, along...

 amphibian
Amphibian
Amphibians , are a class of vertebrate animals including animals such as toads, frogs, caecilians, and salamanders. They are characterized as non-amniote ectothermic tetrapods...

s from the Carboniferous
Carboniferous
The Carboniferous is a geologic period and system that extends from the end of the Devonian Period, about 359.2 ± 2.5 Mya , to the beginning of the Permian Period, about 299.0 ± 0.8 Mya . The name is derived from the Latin word for coal, carbo. Carboniferous means "coal-bearing"...

 and 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...

 periods, which included animals such as Diplocaulus
Diplocaulus
Diplocaulus is an extinct genus of leponspondyl amphibian from the Permian period of North America.- Description :...

. In appearance, they would have resembled modern newt
Newt
A newt is an aquatic amphibian of the family Salamandridae, although not all aquatic salamanders are considered newts. Newts are classified in the subfamily Pleurodelinae of the family Salamandridae, and are found in North America, Europe and Asia...

s or aquatic salamander
Salamander
Salamander is a common name of approximately 500 species of amphibians. They are typically characterized by a superficially lizard-like appearance, with their slender bodies, short noses, and long tails. All known fossils and extinct species fall under the order Caudata, while sometimes the extant...

s. They had long flattened tails to aid in swimming, and well-developed hind limbs, with a full set of five toes each. The forelimbs were somewhat reduced however, and like modern amphibians
Lissamphibia
The subclass Lissamphibia includes all recent amphibians and means smooth amphibia.Extant amphibians fall into one of three orders — the Anura , the Caudata or Urodela , and the Gymnophiona or Apoda .Although the ancestry of each group is still unclear, all share certain common characteristics,...

 typically had only four toes each.

Taxonomy

  • Order Nectridea
    • Arizonerpeton
      Arizonerpeton
      Arizonerpeton is an extinct genus of nectridean lepospondyl....

    • Family Scincosauridae
      • Sauravus
        Sauravus
        Sauravus is an extinct genus of nectridean lepospondyl within the family Scincosauridae.-See also:* Prehistoric amphibian* List of prehistoric amphibians...

      • Scincosaurus
        Scincosaurus
        Scincosaurus is an extinct genus of nectridean lepospondyl within the family Scincosauridae.-See also:* Prehistoric amphibian* List of prehistoric amphibians...

    • Family Keraterpetontidae
      Keraterpetontidae
      Keraterpetontidae is an extinct family of lepospondyl amphibians that arose during the Late Carboniferous and died out during the early Permian period....

      • Batrachiderpeton
        Batrachiderpeton
        Batrachiderpeton is an extinct genus of nectridean lepospondyl within the family Keraterpetontidae.-See also:* Prehistoric amphibian* List of prehistoric amphibians-External links:* in the Paleobiology Database...

      • Keraterpeton
        Keraterpeton
        Keraterpeton is an extinct genus of lepospondyl amphibian from the Carboniferous period of Europe and North America.Keraterpeton was a salamander-like creature about long. Its tail was remarkably long taking up two thirds of the animal's total length, and was laterally flattened, presumably to aid...

      • Diceratosaurus
        Diceratosaurus
        Diceratosaurus is an extinct genus of nectridean lepospondyl within the family Keraterpetontidae. Fossils of Diceratosaurus were first described by Edward Drinker Cope in 1874. The species D. brevirostris is well known from Jefferson County, Ohio, with approximately 50 specimens having been...

      • Diploceraspis
        Diploceraspis
        Diploceraspis was a lepospondyl amphibian. It lived in Ohio during the Permian period. It closely resembles Diplocaulus, and is a relative. It generally sports the same features as Diplocaulus....

      • Diplocaulus
        Diplocaulus
        Diplocaulus is an extinct genus of leponspondyl amphibian from the Permian period of North America.- Description :...

    • Family Urocordylidae
      • Urocordylus
        Urocordylus
        Urocordylus is an extinct genus of nectridean lepospondyl. It is the type genus of the family Urocordylidae. Fossils have been found from Ireland that date back to the Westphalian stage of the late Carboniferous.-See also:* Prehistoric amphibian...

      • Ctenerpeton
        Ctenerpeton
        Ctenerpeton is an extinct genus of nectridean lepospondyl within the family Urocordylidae.-See also:* Prehistoric amphibian* List of prehistoric amphibians...

      • Ptyonius
        Ptyonius
        Ptyonius is an extinct genus of nectridean lepospondyl within the family Urocordylidae....

      • Sauropleura
        Sauropleura
        Sauropleura is an extinct genus of nectridean lepospondyl within the family Urocordylidae.-See also:* Prehistoric amphibian* List of prehistoric amphibians...

      • Lepterpeton
        Lepterpeton
        Lepterpeton is an extinct genus of nectridean lepospondyl within the family Urocordylidae.-See also:* Prehistoric amphibian* List of prehistoric amphibians...

      • Montcellia
        Montcellia
        Montcellia is an extinct genus of nectridean lepospondyl within the family Urocordylidae.-See also:* Prehistoric amphibian* List of prehistoric amphibians...

      • Crossotelos
        Crossotelos
        Crossotelos is an extinct genus of nectridean lepospondyl within the family Urocordylidae.-See also:* Prehistoric amphibian* List of prehistoric amphibians...


External links

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