Ischyrorhynchus fossil map
Where fossils of Ischyrorhynchus have been found, shown on the Earth as it looked about 5 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 5 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 | Early mammals |
|---|---|
| Lived | 11.63–3.6 million years ago (Tortonian to Zanclean) |
| Periods | Neogene |
| Family | Iniidae |
| Named by | Ameghino 1891 |
| Fossil records | 16 occurrences at 6 locations (PBDB) |
| Found in | Venezuela, Argentina, Brazil |
| Rock formations | Urumaco, Entre Rios, Solimoes, Codore |
About Ischyrorhynchus
Ischyrorhynchus is an extinct genus of probable iniid river dolphins from South America. One species has been described, I. vanbenedeni.
Text in “About” is quoted from the Wikipedia article Ischyrorhynchus (revision 1336261089), 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: Q116349082.
