Hoplorhynchus aster n. sp. (Apicomplexa: Eugregarinida: Actinocephalidae: Menosporinae) and Anguilloforma marcelyni (Actinocephalidae: Acanthosporinae) are described from adults of Ischnura ramburii and Enallagma civile (Odonata: Zygoptera: Coenagrionidae), respectively, from south and west Texas, U.S.A. Hoplorhynchus aster is the eleventh species described in the genus, and only the second reported from North America. It is distinguished from Hoplorhynchus acanthatholius by the number of digitations surrounding the epimerite disk (8 in H. acanthatholius vs. 14–18 in H. aster). Anguilloforma marcelyni gen. et n. sp. is distinguished from existing genera within Acanthosporinae by oocysts bearing a total of 14 spines (6 equatorial, 1 at each equatorial vertex, and 4 terminal spines inserted at each pole, 1 at each vertex created by polar truncations); mature trophozoites long and slender; and epimerite a simple, striated cup.