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Chrysocetus healyorum

Mammalia - Artiodactyla - Basilosauridae

Taxonomy
Chrysocetus healyorum was named by Uhen and Gingerich (2001) [South Carolina State Museum]. Its type specimen is SCSM 87.195, a partial skeleton, and it is a 3D body fossil. Its type locality is Santee Portland Cement Co. quarry, which is in a Priabonian marine wackestone/grainstone in the Tupelo Bay Formation of South Carolina.

Synonymy list
YearName and author
2001Chrysocetus healyorum Uhen and Gingerich p. 1 figs. 1-10
2002Chrysocetus healyorum Uhen p. 79
2004Chrysocetus healyorum Uhen p. 12
2008Chrysocetus healyorum McLeod and Barnes p. 93
2008Chrysocetus healyorum Uhen p. 561
2011Chrysocetus healyorum Schouten p. 18
2013Chrysocetus healyorum Uhen p. 8 figs. Figure 5
2015Chrysocetus healyorum Gingerich and Zouhri p. 278
2018Chrysocetus healyorum Uhen

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
RankNameAuthor
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderArtiodactyla()
Cetacea()
Pelagiceti
familyBasilosauridae
genusChrysocetus
specieshealyorum

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
M. D. Uhen and P. D. Gingerich 2001Chrysocetus healyorum has features of Dorudontinae (particularly vertebral bodies that lack elongation seen in members of the Basilosauridae) but differs from other Dorudontines in having smooth enamel and lacking vertically ori- ented ornamentation on the upper premolars. In addition, the premolars are more gracile than those of Dorudon, and the upper premolars lack crenulations on the mesial and distal cingula like those of Zygorhiza (Kellogg 1936; see Fig. 1). Based on comparable skeletal elements, C. healyorum was larger than Saghacetus osiris and smaller than Pontogeneus bracbyspondylus.
M. D. Uhen 2004Chrysocetus healyorum has features of Dorudontinae (particularly vertebral bodies that lack elongation seen in members of the Basilosauridae) but differs from other Dorudontines in having smooth enamel and lacking vertically-oriented ornamentation on the upper premolars. In addition, the premolars are more gracile than those of Dorudon, and the upper premolars lack crenulations on the mesial and distal cingula like those of Zygorhiza (Kellogg 1936; see Fig. 1). Based on comparable skeletal elements, C. healyorum is larger than Saghacetus osiris and smaller than Pontogeneus brachyspondylus.
M. D. Uhen 2013Chrysocetus healyorum has vertebral bodies that lack elongation seen in members of the genus Basi- losaurus. C. healyorum also has very smooth enamel and lacks vertically oriented ornamentation on the upper pre- molars. In addition, the premolars are more gracile than those of Dorudon, and the upper premolars lack crenula- tions on the mesial and distal cingula like those of Zygorhi- za. Based on comparable skeletal elements, C. healyorum was larger than Saghacetus osiris and smaller than mem- bers of the genera Dorudon, Cynthiacetus, and Basilosaurus (after Uhen and Gingerich, 2001).