Megistonyx fossil map
Where fossils of Megistonyx have been found, shown on the Earth as it looked about 0 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 0 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 | 0.129–0.0117 million years ago (Late Pleistocene) |
| Periods | Quaternary |
| Family | Megalonychidae |
| Named by | McDonald et al. 2013 |
| Fossil records | 2 occurrences at 1 locations (PBDB) |
| Found in | Venezuela |
| Rock formations | txn:43596 |
About Megistonyx
Megistonyx is an extinct genus of ground sloth endemic to South America during the Late Pleistocene (Lujanian). It is known from one skeleton collected in the Andes of Venezuela, and is closely related to Ahytherium.
Text in “About” is quoted from the Wikipedia article Megistonyx (revision 1216667521), 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: Q30693620.