Dryomorpha
Ornithopoda is a clade of ornithischian dinosaurs, called ornithopods. They represent one of the most successful groups of herbivorous dinosaurs during the Cretaceous. The most primitive members of the group were bipedal and relatively small-sized, while advanced members of the subgroup Iguanodontia became quadrupedal and developed large body size. Their major evolutionary advantage was the progressive development of a chewing apparatus that became the most sophisticated ever developed by a non-avian dinosaur, rivaling that of modern mammals such as the domestic cow. They reached their apex of diversity and ecological dominance in the hadrosaurids, before they were wiped out by the Cretaceous–Paleogene extinction event along with all other non-avian dinosaurs. Members are known worldwide.

User:Ricardalovesmonuments Rodney SandwichCafe User:FunkMonk ★Kumiko★ Jim, the Photographer · CC BY-SA 4.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- EuiguanodontiaPBDB
- Diet
- herbivorePBDB, for Ornithopoda
- Life habit
- ground dwelling, gregariousPBDB, for Ornithischia
- Motility
- actively mobilePBDB, for Ornithischia
- Environment
- terrestrialPBDB, for Ornithischia
Time the record covers
At least 102 million years on record.
The record covers at least 174.7 Mya to 72.2 Mya. No occurrence read is dated outside 201.4 Mya to 61.66 Mya.
2,415 occurrences of Dryomorpha on record, most of them in the Late Cretaceous. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
2,415 occurrences- Early Jurassicunder 1%
- Middle Jurassicunder 1%
- Late Jurassic5%
- Early Cretaceous16%
- Late Cretaceous79%
- Paleoceneunder 1%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
344 formations
- Dinosaur Park Formation · Belly River Group158
- Hell Creek Formation · Montana Group100
- Kirtland Formation100
- Fruitland/Kirtland Formation96
- Morrison Formation72
- Two Medicine Formation · Montana Group69
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The named rock units Dryomorpha has been recovered from, largest first. Drawn where the rock is now, not where it formed. 320 further formations hold fewer occurrences each and are not listed. 187 occurrences have no formation on record, which is common for older literature.
Dryomorpha and its relatives
Late CretaceousWhere Dryomorpha and its relatives were recorded in the Late Cretaceous.
Found in the same rock
1,244 taxa- Hadrosauridae96 sites
- Trionychidae65 sites
- Ceratopsidae64 sites
- Myledaphus bipartitus59 sites
- Baenidae55 sites
- Theropoda54 sites
- Scapherpeton tectum53 sites
- Teleostei52 sites
- Lepisosteus occidentalis51 sites
- Anura50 sites
- Chelydridae49 sites
- Opisthotriton kayi47 sites
- Crocodylia46 sites
- Multituberculata45 sites
- Champsosaurus41 sites
- Hadrosaurinae41 sites
- Paronychodon41 sites
- Tyrannosauridae38 sites
- Adocus36 sites
- Saurornitholestes langstoni35 sites
- Coriops amnicolus33 sites
- Paralbula casei32 sites
- Aves30 sites
- Mammalia30 sites
The Paleobiology Database records at least 1,790 sites for Dryomorpha, and this reads 240 of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
964 references- Paleontological survey, resource assessment, and mitigation plan for the Bisti-Star Lake Area, northwestern New Mexico115
- Hadrosaurian dinosaurs of North America108
- Dinozavri severnoi Yevrazii: Novye dannye o sostave kompleksov, ekologii i paleobiogeografii [Dinosaurs of northern Eurasia: new data about assemblages, ecology, and paleobiogeography]80
- Stratigraphic distribution of hadrosaurids in the Upper Cretaceous Fruitland, Kirtland, and Ojo Alamo formations, San Juan Basin, New Mexico61
- The hadrosaurian record from Mexico50
- Diversity of Late Cretaceous dinosaurs from Mexico44
- Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota32
- The hadrosaurid record in the Maastrichtian of the eastern Tremp Syncline (Northern Spain)30
- Quarries of Dinosaur Provincial Park30
- Hadrosaurian Dinosaurs of Big Bend National Park, Brewster County, Texas30
- Fossil Vertebrate Collections24
- The paleogeographic and stratigraphic distribution of ceratopsids (Ornithischia) in the Upper Judith River Group of western Canada22
Each of the 2,415 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 952 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Dryomorpha
- Source
- Wikipedia/Commons
- Credit
- User:Ricardalovesmonuments Rodney SandwichCafe User:FunkMonk ★Kumiko★ Jim, the Photographer
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Dryomorpha was found in Sketchfab.
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Ornithopoda”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itEuiguanodontia through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Sereno 1986