Protohadros fossil map
Where fossils of Protohadros have been found, shown on the Earth as it looked about 100 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 100 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 | Iguanodonts & duck-bills |
|---|---|
| Lived | 100.5–93.9 million years ago (Cenomanian) |
| Periods | Cretaceous |
| Named by | Head 1998 |
| Fossil records | 4 occurrences at 4 locations (PBDB) |
| Found in | United States |
| Rock formations | Lewisville |
About Protohadros
Protohadros (meaning "first hadrosaur") is a genus of basal hadrosauroid dinosaur from the early Late Cretaceous (Cenomanian stage, approximately 100-93.9 million years ago) of what is now Texas, United States. It is represented by the species Protohadros byrdi, known from a partially complete skull and associated postcranial remains recovered from the Woodbine Formation. Protohadros was one of the earliest derived hadrosaurs in North America.
Text in “About” is quoted from the Wikipedia article Protohadros (revision 1378742896), 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: Q1976657.
