Paronychodon
Paronychodon is an extinct theropod dinosaur genus. It is a tooth taxon, often considered dubious because of the fragmentary nature of the fossils, which include "buckets" of teeth from many disparate times and places but no other remains, and should be considered a form taxon.

Thomas E. Williamson, Stephen L. Brusatte · CC BY 2.5 · 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
- ParavesPBDB
- Diet
- carnivorePBDB, for Coelurosauria
- Life habit
- ground dwelling, solitaryPBDB, for Theropoda
- Motility
- actively mobilePBDB, for Theropoda
- Environment
- terrestrialPBDB, for Theropoda
Time the record covers
At least 77 million years on record.
The record covers at least 149.2 Mya to 72.2 Mya. No occurrence read is dated outside 154.8 Mya to 66 Mya.
142 occurrences of Paronychodon 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
142 occurrences- Late Jurassicunder 1%
- Early Cretaceous3%
- Late Cretaceous96%
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
34 formations
- Hell Creek Formation · Montana Group35
- Oldman Formation · Belly River Group16
- Dinosaur Park Formation · Belly River Group14
- Lance Formation11
- Milk River Formation9
- Bissekty Formation5
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The named rock units Paronychodon has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 further formations hold fewer occurrences each and are not listed. 2 occurrences have no formation on record, which is common for older literature.
Paronychodon and its relatives
Late CretaceousWhere Paronychodon and its relatives were recorded in the Late Cretaceous.
Found in the same rock
988 taxa- Ceratopsidae56 sites
- Myledaphus bipartitus53 sites
- Scapherpeton tectum51 sites
- Baenidae50 sites
- Hadrosauridae48 sites
- Theropoda48 sites
- Anura47 sites
- Trionychidae47 sites
- Teleostei46 sites
- Chelydridae44 sites
- Lepisosteus occidentalis43 sites
- Opisthotriton kayi43 sites
- Richardoestesia41 sites
- Dromaeosauridae39 sites
- Aves38 sites
- Champsosaurus38 sites
- Multituberculata36 sites
- Tyrannosauridae35 sites
- Adocus30 sites
- Belonostomus longirostris28 sites
- Brachychampsa montana28 sites
- Lepisosteus28 sites
- Lonchidion selachos28 sites
- Borealosuchus sternbergii27 sites
The Paleobiology Database records 133 sites for Paronychodon, and this reads all 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
54 references- The paleogeographic and stratigraphic distribution of ceratopsids (Ornithischia) in the Upper Judith River Group of western Canada18
- Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota13
- Vertebrate microsite assemblages (exclusive of mammals) from the Foremost and Oldman Formations of the Judith River Group (Campanian) of southeastern Alberta: an illustrated guide13
- Diversity and variation of theropod dinosaur teeth from the uppermost Santonian Milk River Formation (Upper Cretaceous), Alberta: a quantitative method supporting identification of the oldest dinosaur tooth assemblage in Canada9
- Diversity of latest Cretaceous (late Maastrichtian) small theropods and birds: teeth from the Lance and Hell Creek formations, USA9
- Fossil Vertebrate Collections8
- Enigmatic teeth of small theropod dinosaurs from the Upper Cretaceous (Cenomanian–Turonian) of Uzbekistan6
- Vertebrate faunal changes through Lancian and Puercan time in southern Wyoming5
- Small theropod teeth from the Late Cretaceous of the San Juan Basin, northwestern New Mexico and their implications for understanding latest Cretaceous dinosaur evolution4
- Fossil vertebrates from the Late Cretaceous Lance Formation, eastern Wyoming4
- Fish & Reptiles of the Rebecca’s Hollow Site, Williams Fork Formation, Late Cretaceous (Edmontonian), Colorado & ‘Between The Dinosaurs’ Toes’: Approaches to Exhibiting Microvertebrate Fossils in Museum Displays (With Emphasis on the Cretaceous Period)2
- The East Side Story – The Transylvanian latest Cretaceous continental vertebrate record and its implications for understanding Cretaceous–Paleogene boundary events2
Each of the 142 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. 42 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 content2
Picture of Paronychodon
- Source
- Wikipedia/Commons
- Credit
- Thomas E. Williamson, Stephen L. Brusatte
- Licence
- CC BY 2.5
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial
- Commercial use
- the licence does not allow it
The description on this site
- 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 itParaves through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cope 1876