Planetetherium is an extinct genus of herbivorous gliding mammal endemic to North America during the Paleogene living from 56.8 to 55.4 mya, existing for approximately .
Planetetherium is an extinct genus of herbivorous gliding mammal endemic to North America during the Paleogene living from 56.8 to 55.4 mya, existing for approximately .
Fossils have been discovered in strata formed from ancient cypress forests, suggesting that this was the animal's preferred habitat.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).