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Compsemys victa

Reptilia

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).

Synonyms
Synonymy list
YearName and author
1856Compsemys victa Leidy p. 312
1856Compsemys victus Leidy p. 312
1857Compsemys victa Leidy p. 90
1860Compsemys victus Leidy p. 152
1897Compsemys victus Marsh p. 527
1902Compsemys victus Hay p. 437
1910Compsemys parva Hay
1910Compsemys vafer Hay
1910Compsemys parva Hay pp. 308-310 figs. fig. 1, pl. 10 figs. 1-3
1910Compsemys vafer Hay pp. 311-313 figs. 2-5
1919Compsemys torrejonensis Gilmore p. 21 figs. Pl. 4:1-2
1919Compsemys puercensis Gilmore p. 198 figs. 1-2
1930Compsemys parvus Hay p. 89
1930Compsemys puercensis Hay p. 89
1930Compsemys torrejonensis Hay p. 89
1930Compsemys vafer Hay p. 89
1930Compsemys victus Hay p. 89
1964Compsemys victa Estes p. 98
1970Compsemys victa Estes and Berberian p. 5
1972Compsemys victa Gaffney pp. 249, 289 fig. 37
1976Compsemys victa Estes p. 507
1989Compsemys victa Bryant p. 41
2002Compsemys victa Holroyd and Hutchison p. 181
2003Compsemys victa Hutchison and Holroyd
2007Compsemys victa Burger p. 144
2011Compsemys victa Lyson and Joyce p. 790 figs. 1-2
2013Compsemys victa Hutchison et al.
2018Compsemys victa López-Conde et al.
2019Compsemys victa Joyce and Anquetin

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
RankNameAuthor
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
Paracryptodira
genusCompsemys
speciesvicta()

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
ReferenceDiagnosis
E. S. Gaffney 1972[as for genus Compsemys]
T. R. Lyson and W. G. Joyce 2011Placed 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 2019Compsemys 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
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialuc
Locomotion: actively mobilec
Created: 2017-04-17 15:15:35
Modified: 2017-04-17 15:15:35
Source: c = class, subp = subphylum, uc = unranked clade
References: Hendy et al. 2009, Carroll 1988

Age range: base of the Maastrichtian to the top of the Ti3 or 72.10000 to 56.80000 Ma

Collections (115 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian83.5 - 70.6Mexico (Baja California) Compsemys victa (197024)
Late/Upper Campanian83.5 - 70.6USA (Utah) Compsemys victa (187664 187668 187669 187679 187681 187695 187705 187713 187715)
Late/Upper Campanian83.5 - 70.6Mexico (Chihuahua) Compsemys victa (35707)
Late/Upper Campanian83.5 - 70.6Mexico (Coahuila) Compsemys victa (24257 24259)
Late/Upper Campanian83.5 - 70.6USA (New Mexico) Compsemys sp. (36449)
Maastrichtian72.1 - 66.0USA (North Dakota) Compsemys victa (45135 45312 45313 45380)
Maastrichtian72.1 - 66.0USA (Montana) Compsemys victa (47626)
Maastrichtian72.1 - 66.0USA (South Dakota) Compsemys victa (45391)
Lancian70.6 - 66.0USA (North Dakota) Compsemys victa (14610 14620 137601 137705 137706 137707 137715 137724 137728)
Lancian70.6 - 66.0USA (South Dakota) Compsemys victa (48235)
Lancian70.6 - 66.0USA (Wyoming) Compsemys victa (14505 14514 14519 14557 14566 14570) Compsemys victus (14542 70343 75287 75298 75429)
Lancian70.6 - 66.0USA (Colorado) Compsemys victa (14640 96082 176847)
Lancian70.6 - 66.0USA (Montana) Compsemys victa (14508 14512 14513 14525 14533 14535 14536 14549 14560 14563 14568 14580 14613 14653 14654)
Late/Upper Maastrichtian70.6 - 66.0USA (Colorado) Compsemys victa (176740)
Late/Upper Maastrichtian70.6 - 66.0USA (Montana) Compsemys victa (13142 189003)
Late/Upper Maastrichtian70.6 - 66.0Canada (Alberta) Compsemys victa (58157)
Late/Upper Maastrichtian70.6 - 66.0USA (North Dakota) Compsemys victa (45099 45109 45110 45111 45114 45117 45118 45119 45128 45133 45134 45136 45143 45144 45145 45299 45381 type locality: 127733 137718 137720)
Late/Upper Maastrichtian70.6 - 66.0USA (South Dakota) Compsemys victa (45388) Testudines indet. (47034)
Late/Upper Maastrichtian70.6 - 66.0USA (Wyoming) Compsemys victa (14585)
Puercan66.0 - 63.3USA (Wyoming) Compsemys victa (14805)
Puercan66.0 - 63.3USA (Colorado) Compsemys victa (14658 118484 176744 176747 176750 176755 176852 176859 176863 176864 176865 176868)
Puercan66.0 - 63.3USA (New Mexico) Compsemys puercensis (128449)
Puercan66.0 - 63.3USA (Montana) Compsemys victa (14766)
Puercan66.0 - 63.3USA (Utah) Compsemys victa (14670 14692 14736 14739 14748 14790)
Puercan - Torrejonian66.0 - 61.7USA (New Mexico) Compsemys parva (128453) Compsemys vafer (128452)
Paleocene66.0 - 56.0USA (New Mexico) Compsemys victa (128451)
Torrejonian63.3 - 61.7USA (Montana) Compsemys victa (14874)
Torrejonian63.3 - 61.7USA (Utah) Compsemys victa (14830 14883)
Torrejonian63.3 - 61.7USA (New Mexico) Compsemys victa, Compsemys torrejonensis (128450)
Ti361.7 - 56.8USA (Colorado) Compsemys victa (99821)