Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Georgiacetinae (disused)

Mammalia - Cetacea - Protocetidae

Synonymy list
YearName and author
2005Georgiacetinae Gingerich et al. p. 200
2007Georgiacetinae Bianucci and Landini p. 45 figs. Table 2.1
2008Georgiacetinae Uhen p. 589

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Chordata(Haeckel 1847)
Vertebrata()
Gnathostomata()
Osteichthyes()
superclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
RankNameAuthor
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderCetacea
familyProtocetidae
subfamilyGeorgiacetinae
subfamilyGeorgiacetinae

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
P. D. Gingerich et al. 2005Georgiacetines, like protocetines, have generalized skulls retaining three incisors in the premaxilla and three molars in the maxilla. Most or all have a derived, reduced pelvic girdle, with the sacrum consisting of a single centrum with or without substantial auricular processes that articulated with the ilia of the
innominates. Hind limbs are not yet known, but reduction of the sacrum suggests that these were probably reduced as well. Georgiacetus itself appears not to have had a distinct sacral vertebra, and the ilium of the preserved innominate shows no evidence of articulation with an auricular process (Hulbert et al., 1998). Locomotion was probably powered more by the tail than the feet.