We describe the composition and structure of the helminth community of the black margate Anisotremus surinamensis in coral reefs from the Parque Nacional Sistema Arrecifal Veracruzano (PNSAV) off the Veracruz coast. We examined a total of 78 specimens (total length TL range 21.7–77.9, mean 33.7 cm) (28 males, TL range 22.5–51.5, mean 32.7 cm; 50 females, TL range 21.7–77.9, mean 34.3 cm) of A. surinamensis. At least nine helminth taxa (seven intestinal) were found, for all of which A. surinamensis is a new host. Our inventory includes two new geographic records for the southern Gulf of Mexico: the digeneans Cainocreadium oscitans (Linton, 1910) and Infundiburictus longovatus (Hopkins, 1941). Observed component community richness (S = 9) and infracommunity richness (mean ± SD, S = 2.8 ± 1.3) for A. surinamensis were lower than previously recorded richness for the sympatric A. virginicus and other coral reef fishes from the PNSAV. Numerically dominant taxa were trematodes (four taxa) and monogeneans (two), followed by nematodes (one), acanthocephalans (and) and cestodes (one). The trematode Monorchis latus was the more prevalent, more abundant and numerically dominant helminth species in the community of parasites of A. surinamensis.
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