Cyclocoelum obliquum Harrah, 1921

Dronen, Norman O. & Blend, Charles K., 2015, Updated keys to the genera in the subfamilies of Cyclocoelidae Stossich, 1902, including a reconsideration of species assignments, species keys and the proposal of a new genus in Szidatitreminae Dronen, 2007, Zootaxa 4053 (1), pp. 1-100 : 23

S. obliquum ( Harrah, 1921) n. comb.

Syn. Cyclocoelum mehrii Khan, 1935

Type host. Common snipe, Gallinago gallinago (Linnaeus) ( Charadriiformes : Scolopacidae ).

Type locality. Chiang Mai, the Kingdom of Thailand (Formerly Siam).

Additional locality. India, specific locality unknown; Allahabad, Allahabad District, India—Yamaguti (1971).

Previously proposed synonym. Cyclocoelum (Cyclocoelum) obliquum Harrah, 1921 — Bashkirova (1950).

Remarks. This species was originally described as Cyclocoelum obliquum Harrah, 1921 . It was considered to be a synonym of Cyclocoelum mutabile ( Zeder, 1800) by Joyeux & Baer (1927), of Cyclocoelum obscurum ( Leidy, 1887) by Witenberg (1928) and Dubois (1959) and of Cyclocoelum elongatum Harrah, 1921 (= Allopyge elongatum [ Harrah, 1921] n. comb.) by Gupta (1964). Cyclocoelum mehrii Khan, 1935 (= Selfcoelum mehrii [ Khan, 1935] n. comb.) was originally described from Gallinago gallinago from India (specific type locality unknown). It is shorter than S. obliquum (10,000 compared to 18,000–28,000), but this is likely due to the age of the specimens examined for the descriptions of these two species. Otherwise these two species are virtually identical. In addition to similarities in measurements, both species have uterine loops that surpass the ceca laterally, posterior-most uterine loops that do not invade the posttesticular space, a rudimentary oral sucker, and both are from G. gallinago . Rudimentary oral sucker present — Harrah (1921).