Dronen, N. O. (2007). Wardianum catoptrophori n. sp. (Digenea: Cyclocoelidae: Haematotrephinae) from the Willet, Catoptrophorus semipalmatus (Scolopacidae), from the Galveston, Texas area of the Gulf of Mexico, U.S.A. Comparative Parasitology. 74(1): 35-40.
Wardianum catoptrophori n. sp. (Digenea: Cyclocoelidae: Haematotrephinae) from the Willet, Catoptrophorus semipalmatus (Scolopacidae), from the Galveston, Texas area of the Gulf of Mexico, U.S.A