Guerrerostrongylus Sutton & Durette-Desset, 1991

Digiani, María Celina & Serrano, Paula Carolina, 2024, Synonymy, redescription, molecular characterisation, and new distribution data of species of Stilestrongylus and Guerrerostrongylus (Nematoda, Heligmonellidae) parasitic in sigmodontine rodents from Argentina and Uruguay: a collection-based survey, Zoosystematics and Evolution 100 (4), pp. 1315-1331 : 1315-1331

Genus Guerrerostrongylus Sutton & Durette-Desset, 1991

Fig. 4 , Table 5

Guerrerostrongylus zeta ( Travassos, 1937)

Longistriata zeta Travassos, 1937

Hassalstrongylus zeta ( Travassos, 1937) : Durette-Desset, 1971

Guerrerostrongylus zeta ( Travassos, 1937) : Sutton & Durette-Desset, 1991

Main diagnostic characters.

Body large to very large (males 4.20–8.40, females 5–13.7 mm), uncoiled or coiled irregularly; cephalic vesicle relatively short and stout. Synlophe with numerous (> 35) continuous, subequal ridges, oriented from right to left (right, dorsal, and ventral ridges) or perpendicular to body surface (left ridges). Males: 37 to 44 ridges, caudal bursa subsymmetrical, elliptical to rectangular, pattern 2-2 - 1 tending to 1-3 - 1, dorsal lobe well developed; rays 6 longest, arising at same level as rays 2; rays 8 arising at proximal 1 / 4 or 1 / 3 of dorsal trunk. Genital cone moderately developed, telamon V-shaped, spicules long and thin with undulating or winding pattern. Females: 35 to 53 ridges; vestibule as long as infundibulum; uterus ca. 20 % of body length; eggs numerous. Posterior extremity straight; tail conical, not retractile. Tail length about 1 / 3 of distance from vulva to posterior extremity (from Travassos 1937; Digiani et al. 2012; Simões et al. 2012 a).

Figures

Figure 4. Guerrerostrongylus zeta. A. Male synlophe in transverse section at midbody; B. Male caudal bursa, dorsal view (left lobe omitted); C. Spicules, ventral view; D. Gubernaculum and genital cone, ventral view; E. Female, posterior end, right lateral view. 8 l - left ray 8; 2 r- 6 r - right bursal rays 2 to 6; 8 r - right ray 8. Scale bars: 50 μm (A, D); 100 μm (B, C, E). A, B, D, E from specimens of Oligoryzomys nigripes from Bella Unión. C from a paratype of G. uruguayensis.