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Hypsilophodontidae (hypsilophodontid)

Reptilia - Hypsilophodontidae

Synonymy list
YearName and author
1882Hypsilophodontidae Dollo
1884Hypsilophodontidae Dollo p. 298
1891Hypsilophodontidae Baur p. 450
1895Hypsilophodontidae Marsh
1896Hypsilophodontidae Marsh p. 244
1911Hypsilophontidae von Zittel p. 289
1924Hypsilophodontidae Lull p. 238
1927Hypsilophodontidae Huene p. 271
1930Hypsilophodontidae Russell p. 140
1935Hypsilophodontidae Parks p. 194
1936Hypsilophodontidae Swinton p. 212
1937Hypsilophodontidae Roxo p. 65
1946Hypsilophodontidae Kuhn p. 66
1947Hypsilophodontidae Lapparent p. 18
1948Hypsilophodontidae Huene p. 94
1954Hypsilophodontidae Haughton and Brink p. 4
1956Hypsilophodontidae Romer p. 628
1963Hypsilophodontidae Parsch p. 4
1964Hypsilophodontidae Estes p. 144
1964Hypsilophodontidae Kuhn p. 5
1964Hypsilophodontidae Tatarinov p. 553
1965Hypsilophodontidae Simmons p. 65
1966Hypsilophodontidae Romer p. 370
1970Hypsilophodontidae Swinton p. 196
1970Hypsilophodontidae Thulborn p. 244
1972Hypsilophodontidae Galton p. 465
1972Hypsilophodontidae Thulborn p. 50
1974Hypsilophodontidae Galton p. 18
1974Hypsilophodontidae Thulborn p. 171
1975Hypsilophodontidae Thulborn p. 134
1977Hypsilophodontidae Galton p. 230
1977Hypsilophodontidae Thulborn p. 737
1978Hypsilophodontidae Bonaparte p. 331
1979Hypsilophodontidae Benton p. 143
1980Hypsilophodontidae Bonaparte p. 82
1980Hypsilophodontidae Ostrom p. 22
1981Hypsilophodontidae Colbert p. 50
1981Hypsilophodontidae McIntosh p. 30
1983Hypsilophodontidae Galton p. 232
1983Hypsilophodontidae Weishampel and Weishampel p. 44
1984Hypsilophodontidae Buscalioni and Sanz pp. 13-14
1984Hypsilophodontidae Milner and Norman p. 146
1984Hypsilophodontidae Norman pp. 160-161 fig. 2
1984Hypsilophodontidae Russell p. 29
1985Hypsilophodontidae Cooper p. 286
1986Hypsilophodontidae Bakker p. 461
1986Hypsilophodontidae Sereno
1987Hypsilophodontidae Buscalioni and Sanz p. 66
1988Hypsilophodontidae Carroll
1989Hypsilophodontidae Dong
1990Hypsilophodontidae Benton p. 19
1990Hypsilophodontidae Sues and Norman p. 500
1992Hypsilophodontidae Weishampel and Heinrich p. 163
1996Hypsilophodontidae Coria and Salgado p. 454 fig. 13
1997Hypsilophodontidae Sereno p. 443
1998Hypsilophodontidae Sereno p. 61
1999Hypsilophodontidae Sereno p. 2138 fig. 2
2001Hypsilophodontidae Eberth et al. p. 57
2006Hypsilophodontidae Chure et al. p. 237
2007Hypsilophodontidae Sánchez-Hernández et al. p. 202

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
RankNameAuthor
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Ornithopoda()
Euornithopoda
familyHypsilophodontidae
familyHypsilophodontidae

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.

Diagnosis
ReferenceDiagnosis
L. Dollo 1882A single row of teeth. Four functional digits in the foot. Rhomboidal, uneven sternum.
R. S. Lull 1924is family contains what are apparently the most primitive members of the Ornithopoda, especially as regards the teeth, which are in a single row as compared with the multiple rows in most of the other groups. They also possess premaxillary teeth. Anterior vertebrae platy- or opisthoccelous; sacrals coossified, and posterior ribs single-headed; hand five-fingered, fourth and fifth generally reduced; foot with four functional digits and vestigial fifth metatarsal. These are the lesser ornithopods, ranging apparently from the Upper Trias to the close of the Age of Reptiles.
F. v. Huene 1948Premaxilla with teeth; symphysis of mandible without teeth; ischium broad distally; long pubis; tibia shorter than femur; 7 cervicals; 5th finger directed backward. Wealden.
P. M. Galton 1972Maxillary and dentary teeth inset (longitudinal recess to maxilla, massive dentary) with randomly formed wear surfaces that are not all in the same plane; no canine teeth or large rostral beak.
D. B. Weishampel and R. E. Heinrich 19921) absence of ridges that culminate in marginal denticles on the heavily enamelled surface of cheek teeth [21 ; reversed in Hypsilophodon],
2) presence of a cingulum on dentary teeth [24],
3) ossification of the sternal segments of the cranial dorsal ribs [26],
4) rod-shaped prepubic process [31].