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Hvirveldyr
Tilbage til: organisme, dyr, rygstrengsdyr.Hvirveldyr (Vertebrata) tilhrer rygstrengsdyrene. Hvirveldyrene har udviklet et akseskelet af brusk, ben eller forbenet brusk kaldet en rygsjle, der beskytter de tykke nervebaner der ligger i rygstrengen, chordaen.
De fleste hvirveldyr har udviklet to par lemmer samt en hjernekasse.
Iflge Tree of Life web projekt Vertebrata, Animals with backbones ser en delmngde af hvirveldyr hierarkiet sdan ud (2003):
- Hvirveldyr Vertebrata
- Kbelse hvirveldyr Agnatha (sliml, lampret...)
- Rundmundede fisk Cyclostomata (Se evt. ogs fisk)
- Kbebrende hvirveldyr Gnathostomata
- Fisk med benpanser Placodermi uddd
- Bruskfisk Chondricthyes (Se evt. ogs fisk)
- Benfisk Teleostomi
- Acanthodii uddd
- Osteichthyes
- Strlefinnede fisk Actinopterygii (Se evt. ogs fisk) (torsk, shest, hvilling, l, sheste...)
- Kdfinnefisk Sarcopterygii (Se evt. ogs fisk)
- Kvastfinnefisk Crossopterygii Coelacanthimorpha
- Lungefisk Dipnoi
- Familie Lepidosirenidae Sydamerikanske lungefisk
- Familie Protopteridae Afrikanske lungefisk
- Tetrapoder (Krybdyr, Dinosaurer, Pattedyr, Fugle, Padder...)
- Kbelse hvirveldyr Agnatha (sliml, lampret...)
Eksterne henvisninger
- Fishbase: Danske populrnavne (og med latinske)
- 2004-05-07, Sciencedaily: Surprising 'Ultra-conserved' Regions Discovered In Human Genome Citat: "..."As far as we can tell, most of these ultra-conserved elements showed up during the evolution of vertebrates, perhaps during the period when land animals emerged, or a bit earlier. But their early evolutionary history is still mysterious," Haussler said..."
- 2004-05-06, Sciencedaily: Scripps Scientists Look Deep Inside Sharks And Their High-performance Swimming System Citat: "..."Sharks and bony fishes have been separated for over 400 million years and yet we see one group of sharks and one group of bony fish that share a remarkable host of similarities in body form and function," said Donley..."
- BBCNews, 9 May, 2003, Animals 'are moral beings' Citat: "..."But the weight of scientific opinion is that it's certainly right to give the benefit of the doubt to all vertebrates."..."
- Markku Savela: Life (Omfattende).
- Fishbase search ( 27,315 Species, 76,410 Synonyms, 137,515 Common names, 34,720 Pictures, 29,525 References, 930 Collaborators, 6.2 million Hits/month) (3/2003).













