Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Chamopsiidae

Reptilia - Chamopsiidae

Synonymy list
YearName and author
1995Chamopsiinae Denton and O'Neill
2010Chamopsiidae Nydam et al. p. 1091

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Squamata()
—Scincomorpha()
—PolyglyphanodontiaAlifanov 2000
—Borioteiioidea
familyChamopsiidae()
familyChamopsiidae()

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.

Fm. †Chamopsiidae Denton and O'Neill 1995
show all | hide all
G. †Chamops Marsh 1892
hide
†Chamops segnis Marsh 1892
Invalid names: Alethesaurus Gilmore 1928 [synonym], Lanceosaurus Gilmore 1928 [synonym]
G. †Haptosphenus Estes 1964
hide
†Haptosphenus placodon Estes 1964
G. †Leptochamops Estes 1964
hide
†Leptochamops denticulatus Gilmore 1928
†Leptochamops thrinax Gao and Fox 1991
G. †Meniscognathus Estes 1964
hide
†Meniscognathus altmani Estes 1964
†Meniscognathus molybrochoros Nydam and Voci 2007
G. †Pelsochamops Makadi 2013
hide
†Pelsochamops infrequens Makadi 2013
G. †Peneteius Estes 1969
hide
†Peneteius aquilonius Estes 1969
†Peneteius saueri McCord 1998
Invalid names: Manangyasaurus McCord 1998 [synonym]
G. †Prototeius Denton and O'Neill 1995
hide
†Prototeius stageri Denton and O'Neill 1995
G. †Socognathus Gao and Fox 1991
hide
†Socognathus brachyodon Longrich et al. 2012
†Socognathus unicuspis Gao and Fox 1991
G. †Stypodontosaurus Gao and Fox 1996
hide
†Stypodontosaurus melletes Gao and Fox 1996
G. †Tripennaculus Nydam and Voci 2007
hide
†Tripennaculus eatoni Nydam and Voci 2007
Diagnosis
ReferenceDiagnosis
R. L. Nydam et al. 2010Borioteiioidean lizards that differ from Asian (Gilmoreteius [= Macrocephalosaurus; Langer 1998] gilmorei, G. chulsanensis, Cherminsaurus kozlowskii, Darchansaurus estesi) and other North American (Bicuspidon numerosus, B. hatzegiensis, Dicothodon moorei, D. cifelli, D. bajaensis, Polyglyphanodon sternbergi) borioteiioids in having a long, massive mandibular symphysis extending posteriorly 4–5 tooth positions that forms the superior and inferior margins of the anterior-most portion of the Meckelian groove. Further differs from the aforementioned taxa and Gilmoreteius gilmorei, G. chulsanensis, Cherminsaurus kozlowskii, Darchansaurus estesi, and Erdenetesaurus robinsonae by having teeth that tend to be massive with a mid-shaft swelling (‘barrel-shaped’), tooth crowns that tend to have mesial and distal accessory ridges often forming cusps, and teeth that are widely spread along the tooth row. Further differs from B. numerosus, B. hatzegiensis, D. moorei, D. cifellii, D. bajaensis, and Po. sternbergi in having tooth crowns that lack a transverse orientation or mediolateral expansion. Differs from Prototeius stageri in lacking an intramandibular septum below the posterior half of the dentary tooth row and in having teeth in the anterior-most portion of the dentary tooth row that are not procumbent to only very weakly procumbent.
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: Carroll 1988, Hendy et al. 2009

Age range: base of the Coniacian to the top of the Clarkforkian or 89.80000 to 54.90000 Ma

Collections (81 total)


Time interval Ma Country or state Original ID and collection number
Middle Turonian93.5 - 89.3USA (Utah) Chamops segnis (181356)
Coniacian - Santonian89.8 - 83.6USA (Utah) Leptochamops sp. (73436)
Santonian86.3 - 83.6Hungary (Veszprém) Pelsochamops infrequens (48722)
Late/Upper Santonian85.8 - 83.5Canada (Alberta) Chamops sp. (14425 14428)
Early/Lower Campanian83.5 - 70.6USA (Texas) Socognathus sp., Chamopsiidae indet. 1, Chamopsiidae indet. 2, Chamopsiidae indet. (200385)
Early/Lower Campanian83.5 - 70.6USA (Utah) Chamops segnis, Leptochamops denticulatus, Meniscognathus altmani (14421)
Judithian83.5 - 70.6USA (Utah) Leptochamops sp., Manangyasaurus saueri (14467)
Judithian83.5 - 70.6Canada (Alberta) Socognathus unicuspis (116537) Socognathus unicuspis, Leptochamops denticulatus, Leptochamops thrinax (14463)
Judithian83.5 - 70.6USA (Wyoming) Leptochamops thrinax (14458)
Late/Upper Campanian83.5 - 70.6Canada (Alberta) Leptochamops sp. (45674 45822 45892 45893 45897 45898 45899) Socognathus unicuspis (45671 89604)
Late/Upper Campanian83.5 - 70.6USA (New Jersey) Haptosphenus sp., Leptochamops sp., Chamops sp. (14455)
Late/Upper Campanian83.5 - 70.6USA (Utah) Chamops segnis (75836 75847) Chamops segnis, Manangyasaurus saueri, Tripennaculus eatoni (14466) Leptochamops sp., Meniscognathus molybrochoros (75846) Peneteius saueri (75849 75850)
Late/Upper Campanian83.5 - 70.6USA (New Mexico) Chamops segnis (36449) Chamopsiidae indet. (209046) Leptochamops denticulatus (52052)
Late/Upper Campanian83.5 - 70.6Mexico (Coahuila) Peneteius aquilonius (154244)
Middle Campanian83.5 - 70.6USA (Utah) Chamops segnis (61844)
Middle Campanian83.5 - 70.6Canada (Alberta) Leptochamops sp. (45561 45564 45566 45567 45820) Socognathus unicuspis (45565 45670)
Middle Campanian - Late/Upper Campanian83.5 - 70.6USA (Texas) Chamops sp. (68001 68003) Peneteius sp. (68006)
Middle Campanian - Late/Upper Campanian83.5 - 70.6USA (Montana) Leptochamops denticulatus (14446)
Middle Campanian - Late/Upper Campanian83.5 - 70.6Canada (Alberta) Leptochamops sp. (45819 45894) Socognathus unicuspis (45821)
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0USA (Colorado) Peneteius sp. (167302)
Early/Lower Maastrichtian70.6 - 66.0Canada (Alberta) Leptochamops sp. (135741)
Lancian70.6 - 66.0USA (Wyoming) Chamops segnis (14577 14598) Chamops segnis, Chamops denticulatus (14606) Chamops segnis, Haptosphenus placodon, Leptochamops denticulatus, Meniscognathus altmani (14519 14566) Chamops segnis, Meniscognathus altmani (14505 14524) Haptosphenus placodon, Meniscognathus altmani (14538) Leptochamops denticulatus (14540 70343) Meniscognathus sp., Chamops segnis, Leptochamops denticulatus (14514) Socognathus brachyodon (137531)
Lancian70.6 - 66.0USA (Montana) Chamops segnis (14534) Chamops segnis, Haptosphenus placodon, Peneteius aquilonius, Leptochamops denticulatus (14549) Chamops segnis, Peneteius aquilonius, Leptochamops denticulatus (14508) Haptosphenus placodon, Leptochamops denticulatus (14568) Leptochamops denticulatus (14574 14654)
Lancian70.6 - 66.0Canada (Saskatchewan) Chamops segnis, Haptosphenus placodon, Leptochamops denticulatus, Meniscognathus altmani (14655) Chamops segnis, Haptosphenus placodon, Leptochamops denticulatus, Meniscognathus altmani, Iguanidae n. gen. B, Scincomorpha n. gen. B, Scincomorpha n. gen. A (14558)
Lancian70.6 - 66.0USA (South Dakota) Chamops segnis (192251) Chamops segnis, Leptochamops denticulatus, Meniscognathus altmani (14537)
Lancian70.6 - 66.0USA (Colorado) C. Laramie chamopsiid (14640)
Lancian70.6 - 66.0USA (New Mexico) Chamops sp. (14518)
Lancian70.6 - 66.0Canada (Alberta) Chamops segnis (14632) Chamops segnis, Haptosphenus placodon, Stypodontosaurus melletes (14630)
Late/Upper Maastrichtian70.6 - 66.0USA (New Mexico) Peneteius sp. (59068)
Late/Upper Maastrichtian70.6 - 66.0USA (Wyoming) Chamops segnis, Chamops denticulatus (118461 118466) Chamops segnis, Haptosphenus placodon, Leptochamops denticulatus, Meniscognathus altmani (14585)
Late/Upper Maastrichtian70.6 - 66.0USA (Montana) Chamops segnis, Haptosphenus placodon, Peneteius aquilonius, Leptochamops denticulatus, Meniscognathus altmani (13142)
Pu166.0 - 63.3USA (Montana) Chamopsiidae indet. (14762)
Clarkforkian56.2 - 54.9USA (Montana) Chamops segnis (15079)