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Rygstrengsdyr

Linn�ss Systematik af Organismer: / Dom�ne / Rige / R�kke / Underr�kke / Overklasse / Klasse / Underklasse / Kohort / Overorden / orden / Underorden / Overfamilie / Familie / Underfamilie / Tribus / Sl�gt / Undersl�gt / Art / Underart /Varietet/(Proveniens)/form/Cultivar

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Systematik af Organismer, Dom�ne: Eukaryota, Rige: Dyreriget Klasse: Rygstrengsdyr (Chordata)

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Tilbage til: organisme, dyr.

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Rygstrengsdyr er en delgruppe af dyrene (animalia). If�lge Tree of Life web projekt Craniata, Animals with skulls, Vertebrata, Animals with backbones, Gnathostomata, Jawed Vertebrates, Sarcopterygii, The lobe-finned fishes & terrestrial vertebrates, terrestriske hvirveldyr ser en delm�ngde af rygstrengsdyr hierarkiet s�dan ud (2003):

• Klasse Rygstrengsdyr Chordata Chordonia
  • S�kdyr Urochordata
  • Tr�vlemunde Cephalochordata
  • Dyr med kranie Craniata
    • Hvirveldyr Vertebrata (tetrapoder, hajer, fisk, lungefisk, Krybdyr, Pattedyr, Fugle, Padder...)

I nedenst�ende tabel er vist en oversigt over nogle af rygstrengsdyrene

Latin	Dansk navn	Antal arter i verden	Antal arter i Danmark
Cephalochordata	Tr�vlemunde	20	1
Pisces	Fisk	24.618	ukendt
Urochordata	S�kdyr	3.000	36

Talangivelserne er alene cirkaangivelser.

Eksterne henvisninger

• Tree of Life web project: Vertebrata, Animals with backbones
• Lars Skipper: dyreriget
• 24 July, 2004, BBC News: World's tiniest fish identified Citat: "...The smallest, lightest animal with a backbone has been described for the first time, by scientists in the US. The miniscule fish, called a stout infantfish [Schindleria brevipinguis], is only about 7mm..."