PBDB Taxon

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Schizodelphis

Mammalia - Cetacea - Eurhinodelphinidae

Taxonomy

Schizodelphis was named by Gervais (1861) [Sepkoski's age data: T Mi-l T Mi-u Sepkoski's reference number: 1066]. It was considered monophyletic by Uhen et al. (2008).

It was synonymized subjectively with Cyrtodelphis by Kellogg (1928).

It was assigned to Delphininae by Brandt (1874); to Odontoceti by Depéret (1893); to Platanistinae by Brandt (1874), Trouessart (1898) and Trouessart (1904); to Iniidae by Allen (1921); to Eurhinodelphini by Winge (1921); to Platanistidae by Lydekker (1887), Paquier (1894), Flores (1895), Palmer (1904) and Sherman (1952); to Acrodelphidae by Simpson (1945), Daxner-Hoeck (1971), Ginsburg and Janvier (1971), Ginsburg and Janvier (1975), Barnes and Mitchell (1978), Pilleri (1986) and Carroll (1988); to Eurhinodelphidae by Muizon (1988) and Muizon (1990); to Acrodelphinidae by Benton (1993) and McKenna and Bell (1997); to Cetacea by Sepkoski (2002); and to Eurhinodelphinidae by Fordyce and de Muizon (2001), Bianucci and Landini (2002), Uhen et al. (2008), Benoit et al. (2011), Bianucci and Varola (2014), Marx et al. (2016), Berta (2017) and Godfrey and Lambert (2023).

Species

Aulacodelphis, S. barnesi (syn. Rhabdosteus hruschkai), S. bogatshowi, S. compressus, S. morckhoviensis, S. planus, S. squalodontoides, S. sulcatus (syn. Delphinus dationum, Delphinus canaliculatus, Delphinus pseudodelphis, Delphinorhynchus desalles)

Sister genera

Aulacodelphis

Synonyms

Aulacodelphis was named by Brandt (1873).

It was considered a nomen nudum by Brandt (1873).
Cyrtodelphis was named by Abel (1900) [Sepkoski's age data: T Mi-l T Mi-u Sepkoski's reference number: 746].

It was synonymized objectively with Schizodelphis by Pia (1937), Simpson (1945), Muizon (1988) and McKenna and Bell (1997).

It was assigned to Platanistinae by Trouessart (1904); to Platanistidae by Abel (1900), Palmer (1904) and Stefani (1916); to Delphinidae by Kellogg (1928); to Argyrocetinae by Abel (1901), Abel (1905), Zittel (1925) and Dal Piaz (1929); to Delphininae by Hay (1930); to Acrodelphidae by Abel (1919) and Carroll (1988); and to Cetacea by Sepkoski (2002).
Platyrhynchus was named by Van Beneden (1876). It is not extant.

It was synonymized subjectively with Schizodelphis by Trouessart (1898); it was synonymized subjectively with Platydelphis by Palmer (1904); it was synonymized subjectively with Cyrtodelphis by Trouessart (1904) and Lambert (2006).

Synonymy list

Year	Name and author
1861	Schizodelphis Gervais p. 126
1873	Aulacodelphis Brandt p. 253
1874	Schizodelphis Brandt p. II
1876	Platyrhynchus Van Beneden
1887	Schizodelphis Lydekker p. 74
1893	Schizodelphis Depéret p. 204
1894	Schizodelphis Paquier p. 47
1895	Schizodelphis Flores p. 12
1898	Schizodelphis Trouessart p. 1021
1900	Cyrtodelphis Abel p. 11
1901	Cyrtodelphis Abel p. 47
1904	Cyrtodelphis Palmer p. 213
1904	Schizodelphis Palmer p. 623
1904	Schizodelphis Trouessart p. 758
1904	Cyrtodelphis Trouessart p. 759
1905	Cyrtodelphis Abel p. 124
1916	Cyrtodelphis Stefani p. 9
1919	Cyrtodelphis Abel p. 766
1921	Schizodelphis Allen pp. 145-147
1921	Schizodelphis Winge p. 35
1925	Cyrtodelphis Zittel p. 87
1928	Cyrtodelphis Kellogg p. 33 figs. Table 1
1929	Cyrtodelphis Dal Piaz p. 80
1930	Cyrtodelphis Hay p. 590
1945	Schizodelphis Simpson p. 103
1952	Schizodelphis Sherman p. 99
1971	Schizodelphis Daxner-Hoeck p. 763
1971	Schizodelphis Ginsburg and Janvier p. 174
1975	Schizodelphis Ginsburg and Janvier p. 84
1978	Schizodelphis Barnes and Mitchell p. 591
1986	Schizodelphis Pilleri p. 77
1988	Cyrtodelphis Carroll
1988	Schizodelphis Carroll
1988	Schizodelphis Muizon p. 46
1990	Schizodelphis Muizon p. 315 figs. Fig. 15
1993	Schizodelphis Benton p. 762
1997	Schizodelphis McKenna and Bell p. 390
2001	Schizodelphis Fordyce and de Muizon p. 178
2002	Schizodelphis Bianucci and Landini p. 21
2002	Cyrtodelphis Sepkoski
2002	Schizodelphis Sepkoski
2008	Schizodelphis Uhen et al. p. 572
2011	Schizodelphis Benoit et al. p. 326
2014	Schizodelphis Bianucci and Varola p. 117
2016	Schizodelphis Marx et al. p. 127
2017	Schizodelphis Berta p. 165
2023	Schizodelphis Godfrey and Lambert p. 101

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha

Rank	Name	Author
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
—	Euungulata
—	Artiodactylamorpha
—	Artiodactyla	()
—	Whippomorpha
order	Cetacea
—	Pelagiceti
—	Neoceti
suborder	Odontoceti
family	Eurhinodelphinidae	()
genus	Schizodelphis

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.

G. †Schizodelphis Gervais 1861

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†Schizodelphis barnesi Myrick 1979

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Invalid names: Rhabdosteus hruschkai Myrick 1979 [synonym]

†Schizodelphis bogatshowi Mchedlidze 1964

†Schizodelphis compressus Portis 1925

†Schizodelphis morckhoviensis Du Bus 1872

†Schizodelphis planus Gervais 1859

†Schizodelphis squalodontoides Longhi 1897

†Schizodelphis squalodontoides capellinii Longhi 1897

†Schizodelphis sulcatus Gervais 1853

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Invalid names: Delphinorhynchus desalles Gervais 1853 [synonym], Delphinus canaliculatus Meyer 1853 [synonym], Delphinus dationum Laurillard 1844 [synonym], Delphinus pseudodelphis Gervais 1849 [synonym]

†Schizodelphis sulcatus incurvata Abel 1900

Invalid names: Aulacodelphis Brandt 1873 [nomen nudum], Cyrtodelphis Abel 1900 [objective synonym]

Diagnosis

Reference	Diagnosis
M. D. Uhen et al. 2008	Symphysis long, occupying about two-thirds the length of the jaw; outer side of lower jaw with long vascular impressions, which often unite to form a groove, which is broad and shallow at first and afterward narrow and deep; angle of the symphysis rounded; lower borders of the rami concave, the upper bent inward, so that, seen from above, the rami, with the angle of the symphysis, assume an elongated oval form; alveoli numerous, reaching up the rami; teeth small; those on the rami short cone-shaped, with the crown bent backward and swollen above the base; premaxillae approximated, ankylosed together in age, depressed in the nasal region, with many grooves in the broader part which converge anteriorly; nasals small; interparietal enclosed between the two frontals and the occipital; frontals mostly free, covered by the maxillae only on the sides (True, 1908a translating Abel [1900]).