Stratum.black
Dryosaurus — Dryosaurus
Dryosaurus — Nobu Tamura (nobu.tamura@yahoo.com), Wikimedia Commons, CC BY SA 4.0

Dinosaur

Dryosaurus

Small ornithopod

Dryosaurus is a small, fast ornithopod of the Morrison Formation, 3 m long, known from bonebeds in Wyoming and Utah. Its small teeth and slender hollow limb bones are sometimes offered from private quarries; most are labelled 'small ornithopod'.

PhylumChordata
ClassReptilia
OrderOrnithischia
FamilyDryosauridae
GroupDinosaur
Rank (PBDB)genus· Paleobiology Database
AuthorMarsh 1894· Paleobiology Database
Classification (PBDB)Chordata › Ornithischia › NO_ORDER_SPECIFIED › Dryosauridae· Paleobiology Database
Range (PBDB)155–143 Ma· Paleobiology Database
PBDB occurrences24· Paleobiology Database

Photographs

Dryosaurus — Dryosaurus altus (Marsh, 1878)
Dryosaurus altus (Marsh, 1878) — Smithsonian Institution (NMNHPALEO), Smithsonian Open Access, CC0
Dryosaurus — Dryosaurus altus (Marsh, 1878)
Dryosaurus altus (Marsh, 1878) — Smithsonian Institution (NMNHPALEO), Smithsonian Open Access, CC0

Age

Formations

Elsewhere

Cite this article

Stratum Study. "Dryosaurus" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/dryosaurus. Accessed 2026-09-20.

BibTeX · CSL-JSON

@misc{stratum-dryosaurus,
  title        = {Dryosaurus},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/taxa/dryosaurus}},
  year         = {2026},
  note         = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb, wikidata, commons, smithsonian. Accessed 2026-09-20.}
}

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