Russellosaurus fossil map
Where fossils of Russellosaurus have been found, shown on the Earth as it looked about 85 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 85 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 | Mosasaurs |
|---|---|
| Lived | 93.9–89.8 million years ago (Turonian) |
| Periods | Cretaceous |
| Family | Mosasauridae |
| Named by | Polcyn and Bell 2005 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | United States |
| Rock formations | Arcadia Park Shale |
About Russellosaurus
Russellosaurus is an extinct genus of tethysaurine mosasauroid from the Late Cretaceous of North America. The genus was described from a skull discovered in an exposure of the Arcadia Park Shale (lower Middle Turonian) at Cedar Hill, Dallas County in the south-central part of the DFW Metroplex in Texas, United States. The skull (SMU 73056, Shuler Museum of Paleontology, Southern Methodist University) was found in 1992 by a member of the Dallas Paleontological Society, who then donated to the museum. Other fragmentary specimens of Russellosaurus have been recovered from the slightly older Kamp Ranch Limestone at two other localities in the Dallas area.
Text in “About” is quoted from the Wikipedia article Russellosaurus (revision 1368670340), 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: Q7381906.
