Archaeotriakis fossil map
Where fossils of Archaeotriakis have been found, shown on the Earth as it looked about 75 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 75 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Ancient fish & sharks |
|---|---|
| Lived | 83.6–66 million years ago (Campanian to Maastrichtian) |
| Periods | Cretaceous |
| Family | Triakidae |
| Named by | Case 1978 |
| Fossil records | 13 occurrences at 10 locations (PBDB) |
| Found in | United States, Canada |
| Rock formations | Mesaverde, Fox Hills, Judith River, Bearpaw, Dinosaur Park |
About Archaeotriakis
Archaeotriakis is an extinct genus of false catshark from the Cretaceous period. Currently, this genus is restricted to the Campanian stage of the Western Interior Seaway of North America. It is known from two species, mainly from isolated teeth. A. rochelleae was described from the Judith River Formation of Montana, USA. A. ornatus was originally described from the Teapot Member of the Mesaverde Group of Wyoming, USA. The range of A. ornatus has since been found in the Bearpaw formation of Alberta, Canada.
Text in “About” is quoted from the Wikipedia article Archaeotriakis (revision 1284387490), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q104858788.
