Identical ITS-1 and ITS-2 sequences suggest Spiculopteragia asymmetrica and Spiculopteragia quadrispiculata (Nematoda: Trichostrongylidae) constitute morphologically distinct variants of a single species

1. Santín-Durán, M.
2. De la Fuente, C.
3. Alunda, J.M.
4. Rosenthal, B.M.
5. Hoberg, E.P.