PBDB Taxon

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

Orodrominae

Reptilia - Thescelosauridae

Taxonomy

Orodrominae was named by Brown et al. (2013). Its type is Orodromeus. It was considered monophyletic by Brown et al. (2013).

It was assigned to Ornithopoda by Dieudonné et al. (2020); and to Thescelosauridae by Brown et al. (2013), Madzia et al. (2018), Button and Zanno (2023).

Subtaxa

Albertadromeus, Koreanosaurus, Orodromeus (type genus), Oryctodromeus, Zephyrosaurus

Synonymy list

Year	Name and author
2013	Orodrominae Brown et al. p. 498
2018	Orodrominae Madzia et al. p. 973 fig. 4
2020	Orodrominae Dieudonné et al.
2023	Orodrominae Button and Zanno

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia

Rank	Name	Author
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Neornithischia	()
family	Thescelosauridae
subfamily	Orodrominae
subfamily	Orodrominae

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.

Subfm. †Orodrominae Brown et al. 2013

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G. †Albertadromeus Brown et al. 2013

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†Albertadromeus syntarsus Brown et al. 2013

G. †Koreanosaurus Huh et al. 2011

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†Koreanosaurus boseongensis Huh et al. 2011

G. †Orodromeus Horner and Weishampel 1988

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†Orodromeus makelai Horner and Weishampel 1988

G. †Oryctodromeus Varricchio et al. 2007

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†Oryctodromeus cubicularis Varricchio et al. 2007

G. †Zephyrosaurus Sues 1980

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†Zephyrosaurus schaffi Sues 1980

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

hydroxyapatiteo

Entire body:

yeso

Adult length:

10 to < 100o

Adult width:

1.0 to < 10o

Adult height:

1.0 to < 10o

Maximum body mass:

10 kgg

Minimum body mass:

3 kgg

Architecture:

compact or denseo

Ontogeny:

accretion, modification of partso

Grouping:

gregariouso

Environment:

terrestrialo

Locomotion:

actively mobileo

Life habit:

ground dwellingo

Diet:

herbivoreo

Reproduction:

oviparouso

Dispersal:

direct/internalo

Dispersal 2:

mobileo

Created:

2004-12-14 12:50:52

Modified:

2004-12-14 14:50:52

Source: g = genus, o = order

References: Peczkis 1995, Marsh 1875

Age range: base of the Late/Upper Albian to the top of the Late/Upper Maastrichtian or 106.30000 to 66.00000 Ma

Collections (27 total)

Time interval	Ma	Country or state	Original ID and collection number
Aptian - Albian	121.4 - 100.5	USA (Wyoming)	Zephyrosaurus sp. (137567 137577)
Albian	113.2 - 100.5	USA (Montana)	Zephyrosaurus schaffi (69693)
Albian	113.2 - 100.5	USA (Wyoming)	Zephyrosaurus sp. (137562)
Late/Upper Albian	106.3 - 100.5	USA (Montana)	Oryctodromeus cubicularis (73373)
Late/Upper Albian - Early/Lower Cenomanian	106.3 - 93.9	USA (Idaho)	Oryctodromeus sp. (227190 227193 227197 227198 227199 227200 227201 227202)
Campanian	83.6 - 72.2	South Korea (Jeollanam-do)	Koreanosaurus boseongensis (52983 98685)
Campanian	83.6 - 72.2	USA (Alberta)	Albertadromeus syntarsus (144510)
Campanian	83.6 - 72.2	Canada (Alberta)	Orodrominae indet. (144509)
Judithian	83.6 - 72.2	Canada (Alberta)	Orodrominae indet. (14451)
Late/Upper Campanian	83.6 - 72.2	USA (Montana)	Orodromeus makelai (22690 53043) Orodromeus sp. (25658)
Middle Campanian	83.6 - 72.2	USA (Montana)	Hypsilophodontidae indet. (13281 22653) Orodromeus makelai (14453) Orodromeus sp. (53058)
Middle Campanian - Late/Upper Campanian	83.6 - 72.2	USA (Montana)	Thescelosaurus neglectus (14446)
Late/Upper Maastrichtian	72.2 - 66.0	USA (Montana)	Thescelosaurus neglectus (13142)