Filaroides hirthi sp. n. (Nematoda: Metastrongyloidea) from the lung of the dog.

Filaroides hirthi sp. n. is smaller than previously described species of the genus Filaroides v. Beneden, 1858, and differs from F. milksi Whitlock, 1956, with which it is most likely to be confused, in having shorter, slightly stouter spicules with a broader proximal knob for attachment of the retractor muscles.