One of 2 black-necked stilts, Himantopus mexicanus, collected from Galveston, Texas, U.S.A., was infected with 60 Caiguiria himantopae n. sp. (Heterophyidae). The new species most closely resembles Caiguiria crassa but differs from it in having a Y-shaped excretory vesicle that lacks lateral branches off the vesicle stem rather than a saccate vesicle with additional lateral branches; ceca that terminate at the level of the ovary rather than extending posteriorly to the testes; and placement of the seminal receptacle on the midline of the body occupying the anterior aspect of the intertesticular space rather than sinistral and some distance ahead of the left testis. Dicranotaenia himantopodis was the only endohelminth found that had been previously reported from black-necked stilts. Allopyge sp., Ascocotyle sp., and Chevreuxia sp. were also found and are new host records.
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