Dipetalonema (Dasypafilaria) averyi subgen. et sp. n. (Nematoda: Filarioidea) from the nine-banded armadillo, Dasypus novemcinctus in Louisiana.

A new filarial nematode, Dipetalonema (Dasypafilaria) averyi subgen. et sp. n., is described from the omentum of armadillos (Dasypus novemicinctus) for southern Louisiana. Within the genus, the large buccal cavity, the absence of a gubernaculum, the reduced number of caudal papillae, the large caudal lappets, and the sheathed microfilaria serve to distinguish the subgenus Dasypafilaria from other subgenera. The small size of D. averyi (females 5.3-9.5 mm long by 70-90 micrometers wide; males 3.8-5.5 mm long by 46-70 micrometers wide) readily distinguishes it from other species in the genus. It also is distinguished by its rounded cephalic extremity, the location of the vulva at the level of the base of the esophagus, the morphology of the spicules, and the size and configuration of the microfilaria.