Athesmia Looss, 1899

Dronen, Norman O., 2014, Keys to the species of Athesmia Loss, 1899 (Digenea: Dicrocoeliidae: Dicrocoeliinae), with the description of a new species from the clapper rail, Rallus longirostris Boddaert (Gruiformes: Rallidae), from Galveston, Texas, U. S. A., Zootaxa 3815 (3), pp. 342-352 : 346

Key to the two body types of Athesmia Looss, 1899

1a. Both ceca extending to level of posterior margin of vitelline field, usually surpassing it posteriorly............................................................................... Athesmia attilae Travassos, 1917 body type ( Figs. 4–5 )

1b. Cecum on side of vitelline field terminating anterior to posterior margin of vitelline field, usually near anterior margin of vitelline field; cecum opposite to vitelline field extending to level of posterior margin of vitelline field, usually surpassing it posteriorly................................................ Athesmia heterolechithodes ( Braun, 1899) body type ( Fig. 6 )

Figures

FIGURES 4–6. 4. Athesmia attillae “type”, apparently a dorsal view. After Travassos (1919), figure 5, representing the attilae body type. 5. A. reducta (likely A. attillae), ventral view. After Travassos (1944), plate 90, figure 4, representing the attilae body type. 6. Athemia heterolechithodes, ventral view. After Skajabin & Evranova (1952), figure 24, representing the heterolechithodes body type. Abbeviations: AT, anterior testis; B, body wall; C, cecum; GP, genital pore; L, Laurer’s canal; M, Mehlis’ glands; OD, oviduct; OV, ovary; PT, posterior testis; R, vitelline reservoir; SR, seminal receptacle; SV, seminal vesicle; U, uterus; V, vitelline field; VS, ventral sucker.