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Basilosaurus isis

Mammalia - Cetacea - Basilosauridae

Taxonomy
Zeuglodon isis was named by Andrews (1904). Its type specimen is CGM 10208, a mandible (partial right mandible), and it is a 3D body fossil. Its type locality is West end of Birket Qarun, which is in a Priabonian coastal sandstone in the Birket Qarun Formation of Egypt.

It was recombined as Prozeuglodon isis by Kellogg (1936); it was recombined as Basilosaurus isis by Gingerich et al. (1990), Gingerich (1992), Uhen (1998), Uhen (2002), Uhen (2004), van Vliet (2004), Clementz et al. (2006), Gingerich (2008), McLeod and Barnes (2008), Uhen (2008), Uhen (2009), Fitzgerald (2010), Schouten (2011), Gingerich (2012), El-kheir et al. (2013), Gingerich and Cappetta (2014), Uhen (2018), Mahdy et al. (2019) and Zalmout et al. (2020).

Synonymy list
YearName and author
1904Zeuglodon isis Andrews pp. 214-215
1906Zeuglodon isis Andrews p. 240
1908Zeuglodon isis Stromer p. 23
1914Zeuglodon isis Abel p. 220
1925Zeuglodon isis Zittel p. 85
1936Prozeuglodon isis Kellogg pp. 75-76
1990Basilosaurus isis Gingerich et al. p. 156
1992Basilosaurus isis Gingerich p. 73
1998Basilosaurus isis Uhen p. 33
2002Basilosaurus isis Uhen p. 79
2004Basilosaurus isis Uhen p. 12
2004Basilosaurus isis van Vliet p. 143
2006Basilosaurus isis Clementz et al. p. 359
2008Basilosaurus isis Gingerich p. 109 figs. Table 1
2008Basilosaurus isis McLeod and Barnes p. 94
2008Basilosaurus isis Uhen p. 561
2009Basilosaurus isis Uhen p. 93
2010Basilosaurus isis Fitzgerald p. 370 figs. Table 1
2011Basilosaurus isis Schouten p. 18
2012Basilosaurus isis Gingerich p. 313 figs. Figure 4
2013Basilosaurus isis El-kheir et al. p. 463
2014Basilosaurus isis Gingerich and Cappetta p. 128 figs. Figure 16
2018Basilosaurus isis Uhen
2019Basilosaurus isis Mahdy et al.
2020Basilosaurus isis Zalmout et al. p. 130

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
RankNameAuthor
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Artiodactylamorpha
Artiodactyla()
Whippomorpha
orderCetacea
Pelagiceti
familyBasilosauridae
genusBasilosaurus
speciesisis()

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.

Basilosaurus isis Andrews 1904
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Diagnosis
ReferenceDiagnosis
A. Mahdy et al. 2019Basilosaurids are well-known from all other Archaeocetes by several derived features. These include the absence of Molar number 3, the presence of multiple accessory denticles on the cheek teeth, absence of the sacrum, reduction of the hin- dlimb, and rotation of the pelvis.