NEMATODOS DE LOS REPTILES DE MEXICO. VIII.- DESCRIPCION DE TRES NUEVAS ESPECIES

Resumen

The authors proceed with this paper their study of the parasitic Nematoda of the Reptiles of Mexico, describing three new species: Capillaria xochimilcensis, Macracis prolixa and Spiroxys triretrodens.
Capillara xochimilcensis n. sp. is similar to C. sonsinoi (Parona, 1897) in the length of the eosophagus and the relation between the anterior and posterior parts of the body, in the female; and different regarding the presence of two caudal papillae, the size of the spicule and the differente relation between the anterior and posterior parts of the body, in the male.
Macracis prolixa n. sp. differs from M. ctenosauri (Caballero, 1938) in having one pair of pre-cloacal papillae, another pair post-cloacal and a third one in the terminal portion of the caudal dorsal process. The specimens and their different organs and eggs are larger in the new species described.
Spiroxys triretrodens n. sp. differs from S. contortus (Rudolphi, 1819) in the lack of gubernaculum; from S. torquata Karve, 1928 (considered by Baylis as a synonym of S. annulata Baylis & Daubney, 1922) in the presence of a preanal false sucker; and from S. constricta (Leidy, 1856) in having ridged spicules and lacking gubernaculum. The presence of three small chitinous teeth in the base of the middle-anterior-lateral tooth,
distinguishes this species from all the others in the genus Spioxyrs.