⚠ This taxon is a local entry, absent from the Paleobiology Database. Data may be incomplete or unverified.

Genus

Valid

Cryptarcus

Holmes et al. 2026

Cryptarcus is a genus of ceratopsid dinosaur found in the Dinosaur Park Formation of Alberta, dating to the middle Campanian age of the Late Cretaceous.

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

PBDB occurrences

Group

Dinosaures

Herbivore

click to enlarge

Cryptarcus ("Chasmosaurus") russelli holotype cranium (CMNFV 8800). (A) Skull in left lateral view (with restored jugal and lower jaw); (B) detail of snout in left lateral view; (C) detail of parietosquamosal frill in dorsal view; (D) detail of supraorbital review in dorsal view; (E) detail of es6 episquamosal; (F) detail of es7 episquamosal. Arrowheads in E and F point to margins of episquamosals. © Holmes et al. (2026) · CC BY 4.0 · Wikimedia

Wikipedia ↗

Classification

Dinosauria Unranked clade

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Ornithischia Unranked clade

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Neornithischia Unranked clade

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Pyrodontia Unranked clade

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Cerapoda Unranked clade

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Marginocephalia Unranked clade

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Ceratopsia Suborder

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Ceratopsidae Family

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Chasmosaurinae Subfamily

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Cryptarcus Genus

Bibliography

Original description

Holmes, Robert B.; Mallon, Jordan C.; Ryan, Michael J.; Evans, David C. (2026). "New information on the holotype of "Chasmosaurus" russelli (Ornithischia: Ceratopsidae) necessitates the establishment of a new genus to receive the species". Canadian Journal of Earth Sciences. 63: 0031. Bibcode:2026CaJES..63.0031H DOI ↗