Messorocaris fossil map
Where fossils of Messorocaris have been found, shown on the Earth as it looked about 500 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 500 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 | Ediacaran & Cambrian life |
|---|---|
| Lived | 504.5–497 million years ago (Drumian to Guzhangian) |
| Periods | Cambrian |
| Named by | Lerosey-Aubril and Skabelund 2018 |
| Fossil records | 3 occurrences at 3 locations (PBDB) |
| Found in | United States |
| Rock formations | Wheeler Shale |
About Messorocaris
Messorocaris is a monotypic genus of fossil arthropod. The only known species is Messorocaris magna from the Wheeler Formation of Utah, dating back to the Cambrian (Drumian) period.
Text in “About” is quoted from the Wikipedia article Messorocaris (revision 1357176635), 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: Q139411276.