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Osteolepidida, also known as osteolepiformes,[1] are a group of prehistoric lobe-finned fishes which appeared first time during the Devonian period. The order contains five families: Canowindridae, Megalichthyidae, Osteolepidae, Thysanolepidae and Tristichopteridae. The superorder is generally considered to be paraphyletic because the characters that define it are mainly attributes of stem tetrapodomorphs.[1]

Osteolepidida
Temporal range: 396–299 Ma
Middle Devonian to Late Carboniferous
Osteolepis BW.jpg
Osteolepis.
Scientific classification
Kingdom:
Phylum:
Subphylum:
Class:
Subclass:
Superorder:
Osteolepidida*
Clades

Below is a cladogram showing the paraphyly of Osteolepiformes compiled and modified from Ahlberg and Johanson (1998).[1] See also Swartz 2012.[2] The Osteolepiformes are marked by the green bracket.

Tetrapodomorpha

Kenichthys

Rhizodontida

Barameda

Gooloogongia

Gogonasus

Osteolepis

Megalichthys

Cladarosymblema

Ectosteorhachis

Medoevia

Koharolepis

Canowindra

Beelarongia

Gyroptychius

Tristichopteridae

Eusthenodon

Mandageria

Cabonnichthys

Platycephalichthys

Jarvikina

Eusthenopteron

Tristichopterus

Panderichthys

Tetrapoda

Acanthostega

Ichthyostega

Osteolepidida

ReferencesEdit

  1. ^ a b c Ahlberg, P. E.; Johanson, Z. (1998). "Osteolepiforms and the ancestry of tetrapods" (PDF). Nature. 395 (6704): 792–794. Bibcode:1998Natur.395..792A. doi:10.1038/27421.
  2. ^ Swartz, B. (2012). "A marine stem-tetrapod from the Devonian of Western North America". PLoS ONE. 7 (3): e33683. Bibcode:2012PLoSO...733683S. doi:10.1371/journal.pone.0033683. PMC 3308997. PMID 22448265.

External linksEdit