Spirura mexicana Peralta-Rodríguez, Caspeta-Mandujano

Spirura mexicana Peralta-Rodríguez, Caspeta-Mandujano & Guerrero

Site infection: Esophagus

Localities: Calcehtok and Homún

Prevalence (%) and mean intensity: Calcehtok 4.8 and 1.5 (1‒2). Homún 3.9 and 2.2 (1‒4.2)

Specimens deposited: CNHE-12323 and NHM 2025.8.13.15

GenBank accession numbers: PX232577 (28S) PX227569 (COI)

Comments: Based on two males and four females. Cuticle thick, with transverse striae ( Figure 8A View FIGURE 8 ) and prominent ventral hump or protuberance in first third of body ( Figure 5K View FIGURE 5 ). Oral aperture dorsoventrally elongated with four external labial papillae ( Figure 8B View FIGURE 8 ). Two pseudolabia, symmetrical, each consisting of narrow bulge flanked by cheilorhabdion or cuticular expansions. Three pairs of teeth, with one larger central pair and two smaller lateral pairs ( Figure 8B View FIGURE 8 ). Male body length 6800–9300 and 350 wide. Muscular esophagus 390–460 long; glandular esophagus 2360–3140 long. Ventral hump located at 1600 from apex. Posterior end with caudal ventral alae supported by pedunculated papillae: seven preanal (three on left side and four on right side), three pairs postanal, and one pair of small phasmids at distal end of tail ( Figure 5L View FIGURE 5 ). Two unequal spicules, right spicule smaller, 158– 175 long, left spicule 540–565 long. Female body, 6780–9210 × 340–450. Muscular esophagus 380–460 long; glandular esophagus 1250–3060. Ventral hump located at 1410–2000 from apex. Vulva situated 2900–3960 from apex. Embryonated eggs, 42–50 × 22–27. Anal opening 140–155 from posterior end.

The morphology and morphometric data of specimens from N. laticaudatus fit with description of S. mexicana ( Peralta-Rodríguez et al. 2012) . This nematode has been reported from P. mesoamericanus , Pteronotus personatus (Wagner) , Macrotus waterhousii Gray , P. fulvus and M. megalophylla ( Peralta-Rodríguez et al. 2012) and Antrozous pallidus (Le Conte) in Puebla and Molossus sp. in Oaxaca ( Martínez-Pérez 2021). This is the first record of S. mexicana for N. laticaudatus .