Propachyrucos is an extinct genus of late Oligocene hegetotheriid notoungulate. It is known from a few mandibular fragments from the Sarmiento Formation, Chubut Province, Argentina.
Propachyrucos is an extinct genus of late Oligocene hegetotheriid notoungulate. It is known from a few mandibular fragments from the Sarmiento Formation, Chubut Province, Argentina.
==Description== Propachyrucos may have been similar to the rabbit-sized Prosotherium, but was almost 20% smaller, more similar in size to Pachyrukhos and Paedotherium, and almost 30% larger than Tremacyllus.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).