Calcarichelys: Research Database Testudines · Cretaceous · North America Research Note: Calcarichelys was a turtle from the Cretaceous of North America, providing important data on turtle evolution during the Cretaceous. Research Finding Status Grade Year Method Citation Impact Kim & Lockley 2016: Calcarichelys and turtle diversity in the Cretaceous Cretaceous Research Confirmed A … Read more
Protostega: Research Database Testudines · Cretaceous · North America Research Note: Protostega was a large marine turtle from the Cretaceous of North America, providing important data on the evolution of sea turtles during the Cretaceous. Research Finding Status Grade Year Method Citation Impact Danilov & Obraztsova 2022: Protostega and Cretaceous turtle diversity Cretaceous … Read more
Chasmosaurus: Research Database Ceratopsidae (Ornithischia) · Late Cretaceous (~76-73 MYA) · North America — Canada, Alberta (Dinosaur Park Formation) Research Note: Chasmosaurus was a chasmosaurine ceratopsid from the Late Cretaceous of Alberta, Canada — one of the most distinctive ceratopsids with its long frill and horn ornamentation. As a member of the Ceratopsidae, it … Read more
In Depth Atlantochelys was first named in 1849 and based upon the description of half a humerus (analogous to your upper arm bone). For well over one hundred and fifty years that was it, but then in 2012 the missing half of this bone was actually matched up to the original specimen. Although Atlantochelys may … Read more
In Depth Though only known from partial remains, Cratochelone has been confirmed as being a protostegid turtle, and one that was very large in size. Though some researchers have credited Cratochelone as being only about two meters in length, the original and more recent studies have ascertained that Cratochelone may have actually reached up to … Read more