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Compsemys victa
Taxonomy
Compsemys victus was named by Leidy (1856). Its type specimen is USNM 960, a partial shell (a neural and two costal fragments), and it is a 3D body fossil. Its type locality is Long Lake, which is in a Maastrichtian terrestrial horizon in the Hell Creek Formation of North Dakota.
It was misspelled as Compsemys victus by Leidy (1860), Marsh (1897), Hay (1902) and Hay (1930); it was corrected as Compsemys victa by Leidy (1856), Leidy (1857), Estes (1964), Estes and Berberian (1970), Gaffney (1972), Estes (1976), Bryant (1989), Holroyd and Hutchison (2002), Hutchison and Holroyd (2003), Burger (2007), Lyson and Joyce (2011), Hutchison et al. (2013), López-Conde et al. (2018) and Joyce and Anquetin (2019).
It was misspelled as Compsemys victus by Leidy (1860), Marsh (1897), Hay (1902) and Hay (1930); it was corrected as Compsemys victa by Leidy (1856), Leidy (1857), Estes (1964), Estes and Berberian (1970), Gaffney (1972), Estes (1976), Bryant (1989), Holroyd and Hutchison (2002), Hutchison and Holroyd (2003), Burger (2007), Lyson and Joyce (2011), Hutchison et al. (2013), López-Conde et al. (2018) and Joyce and Anquetin (2019).
Synonyms
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Synonymy list
Year | Name and author |
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1856 | Compsemys victa Leidy p. 312 |
1856 | Compsemys victus Leidy p. 312 |
1857 | Compsemys victa Leidy p. 90 |
1860 | Compsemys victus Leidy p. 152 |
1897 | Compsemys victus Marsh p. 527 |
1902 | Compsemys victus Hay p. 437 |
1910 | Compsemys parva Hay |
1910 | Compsemys vafer Hay |
1910 | Compsemys parva Hay pp. 308-310 figs. fig. 1, pl. 10 figs. 1-3 |
1910 | Compsemys vafer Hay pp. 311-313 figs. 2-5 |
1919 | Compsemys torrejonensis Gilmore p. 21 figs. Pl. 4:1-2 |
1919 | Compsemys puercensis Gilmore p. 198 figs. 1-2 |
1930 | Compsemys parvus Hay p. 89 |
1930 | Compsemys puercensis Hay p. 89 |
1930 | Compsemys torrejonensis Hay p. 89 |
1930 | Compsemys vafer Hay p. 89 |
1930 | Compsemys victus Hay p. 89 |
1964 | Compsemys victa Estes p. 98 |
1970 | Compsemys victa Estes and Berberian p. 5 |
1972 | Compsemys victa Gaffney pp. 249, 289 fig. 37 |
1976 | Compsemys victa Estes p. 507 |
1989 | Compsemys victa Bryant p. 41 |
2002 | Compsemys victa Holroyd and Hutchison p. 181 |
2003 | Compsemys victa Hutchison and Holroyd |
2007 | Compsemys victa Burger p. 144 |
2011 | Compsemys victa Lyson and Joyce p. 790 figs. 1-2 |
2013 | Compsemys victa Hutchison et al. |
2018 | Compsemys victa López-Conde et al. |
2019 | Compsemys victa Joyce and Anquetin |
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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.
†Compsemys victa Leidy 1856
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Invalid names: Compsemys parva Hay 1910 [synonym], Compsemys puercensis Gilmore 1919 [synonym], Compsemys torrejonensis Gilmore 1919 [synonym], Compsemys vafer Hay 1910 [synonym]
Diagnosis
Reference | Diagnosis | |
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E. S. Gaffney 1972 | [as for genus Compsemys] | |
T. R. Lyson and W. G. Joyce 2011 | Placed along the phylogenetic stem of Paracryptodira by nasals that prevent frontals from entering narial opening; no medial contact of the prefrontals; foramen posterius canalis carotici interni located halfway along contact between pterygoid and basisphenoid; posterior plastral thickening medial to the bridge. Autapomorphies include: no cheek emargination; rectangular quadratojugal; quadratojugal extends ventrally to a level even with mandibular condyles of quadrate, covering up these condyles; postorbital contributes to rim of cavum tympani; cavum tympani diameter less than diameter of orbit; mesoplastra unusually large and with broad midline contact; first peripherals meet medially in front of nuchal, preventing the nuchal from being exposed along the anterior margin of carapace; deep xiphiplastral notch present, varying from Ushaped to V-shaped; sinuous midline sulcus on plastron. | |
W. G. Joyce and J. Anquetin 2019 | Compsemys victa can be diagnosed as a paracryptodire and a representative of Compsemys by the full list of characters listed for those clades above. Compsemys victa can most readily be differentiated from Compsemys russelli by possessing only a single, large suprapygal that has a lateral contact with peripheral X |