all ornithischians, all the time

palaeopedia:

The Turan horn face, Turanoceratops (1989)
Phylum : ChordataClass : ReptiliaOrder : OrnithischiaSuperfamily : CeratopsoideaFamily : CeratopsidaeGenus : TuranoceratopsSpecies : T. tardabilis
Late Cretaceous (90 Ma)
2 m long and 250 kg (size)
Bissekty formation, Uzbekistan (map)
Ceratopsians, the horned, frilled dinosaurs, followed a neat evolutionary arc: small, ancestral genera like Chaoyangsaurus and Psittacosaurus sprouted up in Asia during the late Jurassic and early Cretaceous periods, and by the end of the Mesozoic Era, their larger, more prominently horned and frilled descendants (like Triceratops) were restricted to North America. That’s what makes Turanoceratops so controversial: this dinosaur was discovered in Uzbekistan in sediments dating to the cusp of the late Cretaceous period (90 million years ago), a time when most ceratopsians should have fully vacated Eurasia. Most likely, Turanoceratops was a neoceratopsid rather than a full-fledged ceratopsid, which almost (but not quite) solves the mystery of its existence.

palaeopedia:

The Turan horn face, Turanoceratops (1989)

Phylum : Chordata
Class : Reptilia
Order : Ornithischia
Superfamily : Ceratopsoidea
Family : Ceratopsidae
Genus : Turanoceratops
Species : T. tardabilis

  • Late Cretaceous (90 Ma)
  • 2 m long and 250 kg (size)
  • Bissekty formation, Uzbekistan (map)

Ceratopsians, the horned, frilled dinosaurs, followed a neat evolutionary arc: small, ancestral genera like Chaoyangsaurus and Psittacosaurus sprouted up in Asia during the late Jurassic and early Cretaceous periods, and by the end of the Mesozoic Era, their larger, more prominently horned and frilled descendants (like Triceratops) were restricted to North America. That’s what makes Turanoceratops so controversial: this dinosaur was discovered in Uzbekistan in sediments dating to the cusp of the late Cretaceous period (90 million years ago), a time when most ceratopsians should have fully vacated Eurasia. Most likely, Turanoceratops was a neoceratopsid rather than a full-fledged ceratopsid, which almost (but not quite) solves the mystery of its existence.