Hassalstrongylus musculi
 Hassalstrongylus musculi is a nematode worm of the genus Hassalstrongylus that infects the marsh rice rat (Oryzomys palustris) and house mouse (Mus musculus) in the United States and Oryzomys couesi Oligoryzomys fulvescens and Handleyomys melanotis in San Luis Potosí Mexico. It was first described as Longistriata musculi by Dikmans in 1935 but transferred to Hassalstrongylus in 1971 and 1972 by Marie-Claude Durette-Desset. She later renamed the material she had used to describe H.