thumb|Juvenile
Masillamys is an extinct genus of rodent. It was named in 1954 by Tobien based on fossils found in the Messel Pit, Germany. It is considered to be a sister genus to the Hartenbergeromys, Lophiparamys, Mattimys, Microparamys, Pantrogna, Sparnacomys, and Strathcona genera.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).