Spirura mexicana Peralta-Rodriguez, 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) and prominent ventral hump or protuberance in first third of body (Figure 5K). Oral aperture dorsoventrally elongated with four external labial papillae (Figure 8B). 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). 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). 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.