Rhipidistia


Rhipidistia

▪ extinct fish
      extinct group of lobe-finned bony fishes of the order Crossopterygii that included the ancestors of amphibians and the other terrestrial vertebrates. The Rhipidistia were common during the Devonian (the Devonian Period lasted from 416 million to 359 million years ago) but became extinct during the Early Permian (the Permian Period began 299 million years ago). They were typical of early crossopterygians. Anatomical details, including skull-bone patterns, infolded (labyrinthodont) tooth enamel, and elements in the paired fins that correspond somewhat with tetrapod limb bones, support the hypothesis that rhipidistians, such as Osteolepis, were very closely related to the land-living vertebrates.

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Universalium. 2010.

Look at other dictionaries:

  • Rhipidistia — Devonische Rhipidistier (und Schwestergruppe Hohlstachler: Actinistier [Coelacanth]) Systematik Stamm: Chordatiere (Chordata) …   Deutsch Wikipedia

  • Rhipidistia — Taxobox name = Rhipidistia fossil range = Early Devonian Recent regnum = Animalia phylum = Chordata classis = Sarcopterygii infraclassis = Crossopterygii unranked ordo = Rhipidistia subdivision ranks = Orders subdivision = See text.The… …   Wikipedia

  • Rhipidistia — Rhipidistiens Ectosteorhachis …   Wikipédia en Français

  • rhipidistia — rhip·i·dis·tia …   English syllables

  • rhipidistia — …   Useful english dictionary

  • Rhipidistien — Rhipidistia Rhipidistiens …   Wikipédia en Français

  • Rhipidistiens — Rhipidistia Rhipidistiens …   Wikipédia en Français

  • crossopterygian — /kro sop teuh rij ee euhn/, n. 1. any fish of the group Crossopterygii, extinct except for the coelacanth, regarded as being ancestral to amphibians and other land vertebrates. adj. 2. pertaining to or resembling a crossopterygian. [1860 65; < NL …   Universalium

  • Actinistia — Quastenflosser Komoren Quastenflosser (Latimeria chalumnae) Zeitraum Devon bis heute 409 bis 0 Mio. Jahre Systematik …   Deutsch Wikipedia

  • Coelacanthiformes — Quastenflosser Komoren Quastenflosser (Latimeria chalumnae) Zeitraum Devon bis heute 409 bis 0 Mio. Jahre Systematik …   Deutsch Wikipedia


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