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Pattedyrlignende krybdyr

Pattedyrlignende krybdyr
Dimetrodon
Dimetrodon
Videnskabelig klassifikation
DomæneEukarya
RigeAnimalia (Dyr)
RækkeChordata (Chordater)
UnderrækkeVertebrata (Hvirveldyr)
OverklasseTetrapoda (Tetrapoder)
Klasse†Synapsida
Ordener
  • †Pelycosauria
  • †Therapsida
Hjælp til læsning af taksobokse

De pattedyrlignende krybdyr (Synapsida) er en uddød dyregruppe som gav ophav til pattedyrene. Gruppen er kendetegnet ved at kraniet har et hul (apsis) mellem skælbenet, postorbitale og kindbenet.

De pattedyrlignende krybdyr dominerede på landjorden i Perm og begyndelsen af Trias og overlevede således Perm-Triasgrænsen.

Kladistisk taksonomi

[redigér | rediger kildetekst]

I følge [1] [2] bør klassificeringen derfor være således:

Kilder/referencer

[redigér | rediger kildetekst]
  1. ^ "Tree of Life web project". Arkiveret fra originalen 27. september 2007. Hentet 30. november 2004.
  2. ^ Taxonomicon: Clade: Cynodontia – ikke: Taxonomicon: Taxon: Series Amniota
Søsterprojekter med yderligere information:
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Pattedyrlignende krybdyr
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