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Cephalotropis
Taxonomy
Cephalotropis was named by Cope (1896) [Sepkoski's age data: T Plio Sepkoski's reference number: 1066]. It is not extant. Its type is Cephalotropis coronatus.
It was corrected as Cephalotropus by Trouessart (1904); it was synonymized subjectively with Plesiocetus by True (1912).
It was assigned to Balaenopterinae by Trouessart (1898); to Balaenidae by Hay (1902), Trouessart (1904) and Case (1904); to Cetacea by Sepkoski (2002); to Herpetocetinae by Steeman (2007); to Mysticeti by Uhen et al. (2008); to Cetotheriinae by Whitmore and Barnes (2008); to Cetotherioidea by Gol'din and Steeman (2015) and Gol'din (2018); and to Cetotheriidae by Kellogg (1928), Hay (1930), Simpson (1945), Carroll (1988), Benton (1993), Gottfried et al. (1994), McKenna and Bell (1997), Goldin et al. (2014), Goldin and Startsev (2014), Marx and Fordyce (2015), Marx et al. (2016), Marx et al. (2016), Berta (2017) and Figueiredo et al. (2024).
It was corrected as Cephalotropus by Trouessart (1904); it was synonymized subjectively with Plesiocetus by True (1912).
It was assigned to Balaenopterinae by Trouessart (1898); to Balaenidae by Hay (1902), Trouessart (1904) and Case (1904); to Cetacea by Sepkoski (2002); to Herpetocetinae by Steeman (2007); to Mysticeti by Uhen et al. (2008); to Cetotheriinae by Whitmore and Barnes (2008); to Cetotherioidea by Gol'din and Steeman (2015) and Gol'din (2018); and to Cetotheriidae by Kellogg (1928), Hay (1930), Simpson (1945), Carroll (1988), Benton (1993), Gottfried et al. (1994), McKenna and Bell (1997), Goldin et al. (2014), Goldin and Startsev (2014), Marx and Fordyce (2015), Marx et al. (2016), Marx et al. (2016), Berta (2017) and Figueiredo et al. (2024).
Species
C. coronatus (type species), C. nectus
Synonymy list
| Year | Name and author |
|---|---|
| 1896 | Cephalotropis Cope p. 143 |
| 1898 | Cephalotropis Trouessart p. 1069 |
| 1902 | Cephalotropus Hay p. 598 |
| 1904 | Cephalotropis Case p. 35 |
| 1904 | Cephalotropus Trouessart p. 779 |
| 1928 | Cephalotropis Kellogg p. 35 figs. Table 1 |
| 1930 | Cephalotropis Hay p. 573 |
| 1945 | Cephalotropis Simpson p. 104 |
| 1988 | Cephalotropis Carroll |
| 1993 | Cephalotropis Benton p. 762 |
| 1994 | Cephalotropis Gottfried et al. p. 233 |
| 1997 | Cephalotropis McKenna and Bell p. 376 |
| 2002 | Cephalotropis Sepkoski |
| 2007 | Cephalotropis Steeman p. 875 |
| 2008 | Cephalotropis Uhen et al. p. 614 |
| 2008 | Cephalotropis Whitmore and Barnes p. 144 |
| 2014 | Cephalotropis Goldin and Startsev p. 419 |
| 2015 | Cephalotropis Gol'din and Steeman p. 12 |
| 2015 | Cephalotropis Marx and Fordyce p. 4 figs. Figure 2 |
| 2016 | Cephalotropis Marx et al. p. 22 figs. Figure 10 |
| 2016 | Cephalotropis Marx et al. p. 110 |
| 2017 | Cephalotropis Berta p. 168 |
| 2018 | Cephalotropis Gol'din p. 23 figs. Fig. 14 |
| 2024 | Cephalotropis Figueiredo et al. p. 20 |
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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. †Cephalotropis Cope 1896
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†Cephalotropis coronatus Cope 1896
†Cephalotropis nectus Kellogg 1940
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Figueiredo et al. 2024 | Medium-sized cetotheriid sharing with the other family members posteriorly convergent ascending processes of the maxillae and nasals and an enlarged compound posterior process of the tympanoperiotic with its facial sulcus floored by a posteroventral flange. Shares with all cetotheriids except Brandtocetus and Cetotherium a posteriorly wider portion of the tympanic bullae; with all cetotheriids except Tiucetus, Nannocetus, Adicetus vandelli and “Cetotherium” megalophysum a paroccipital process in line or posterior to the posterior edge of the occipital condyle, in dorsal view. Differs from all cetotheriids by lacking a wider than long temporal fossa; from all cetotheriids except Tiucetus by lacking a dorsal primary infraorbital foramen; from all cetotheriids except Tiucetus, Brandtocetus, Kurdalagonus, Adicetus in having a sigmoi- dal lateral edge of the supraoccipital, in dorsal view; from all cetotheriids except Tiucetus, Jou- mocetus and Ciuciulea in having a great portion of the parietal exposed on the skull vertex; from all cetotheriids except Tiucetus, Joumocetus, Ciuciulea and Metopocetus in having an approximately triangular shaped ascending processes of the maxillae. Further differs from Tiu- cetus, Brandtocetus, Kurdalagonus, Cetotherium and Tranatocetus by lacking a squamosal prominence; from Herpetocetus and Piscobalaena in having “U” shaped anterior margins of the nasals; from Cetotherium, Piscobalaena and Adicetus by having the anteromedial portion of the palatines forming a well-developed medial crest; from Piscobalaena and Adicetus by hav- ing a straight outline of the suture between the palatines and maxillae; from Herpetocetus for lacking a opening between the parietal and squamosal; and from Adicetus for lacking a faint pair of tubercles on the supraoccipital. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||