Þā sycedēor (Mammalia) sind gefērscipe hƿeorfdēores. Þā habbaþ syndermearcung: þā habbaþ meolcþgetāga, þe þæt ƿīfliċe dēor meolc ofcymþ sƿā fēdnes for geongan; þā habbaþ hǣr; and þā sind ƿearmblōded.

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Sycedēor
Fossil range: Late Triassic–Recent

Cræftlicu endebyrdung
Rīce: Animalia
Stefn: Chordata
Understefn: Vertebrata
(unranked) Amniota
Flocc: Mammalia
Linnaeus, 1758

Hēr sind 5,500 cynna in gefērscipe Mammalia, species, brytsnode ofer 1,200 cnōsla, 152 cnēorissa, and 46 hāda.