Ophthalmophagus singularis ( Stossich, 1902 )

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 : 78

Ophthalmophagus singularis ( Stossich, 1902) — Type species

Type host. Little crake, Porzana parva (Scopoli) (Syn. Gallinula pusilla Bechstein ) ( Gruiformes : Rallidae ).

Type locality. Russian Federation; specific type locality unknown.

Additional hosts. Water rail, Rallus aquaticus Linnaeus ; Virginia rail, Rallus limicola Vieillot ( Gruiformes : Rallidae )— Yamaguti (1971).

Additional localities. Tadzhikistan; Iowa, USA—Yamaguti (1971).

Previously proposed synonyms. Ophthalmophagus massinoi Witenberg, 1926 — Joyeux & Baer (1927); Ophthalmophagus nasicola Witenberg, 1923 , O. massinoi and Ophthalmophagus charadrii Yamaguti, 1934 — Dubois (1959).

Remarks. The original description of this species was brief and included only a body length (4 mm), a body width (1 mm) and a rudimentary illustration. Kossack (1911) redescribed the species apparently from the specimens (No. 622; Vienna Museum) used in the original description by Stossich (1902). Stossich (1902) considered the ovary to be intertesticular and nearly in line with the nearly tandem testes, which would place this species in Hyptiasminae. Although Stossich (1902) described the genital pore as being prepharyngeal, he considered thevitelline fields to be not confluent posteriorly ( Prohyptiasmus ), while Kossack (1911, Fig. 9 ) apparently considered the ovary to be posttesticular (Ophthalmophaginae) and the vitelline fields to be confluent posteriorly ( Ophthalmophagus ). We agree with Kossack (1911) and more recent authors (e.g. Dubois 1959; Yamaguti 1971) that the ovary is posttesticular and nearly in a straight line with the nearly tandem testes (Ophthalmophaginae) and that the vitelline fields are confluent posteriorly, and support its assignment to Ophthalmophagus . Joyeux & Baer (1927) considered this species to be in Spaniometra. No oral or ventral sucker described—Stossich (1902); Kossack (1911); Bashkirova (1950).

Figures

FIGURES 5 – 9. Diagrammatic representations of species representing the genera assigned to Haematotrephinae Dollfus, 1948. 5. Neohaematotrephus Kanev, Radev, & Fried, 2002 represented by Neohaematotrephus arayae Zamparo, Brooks, Causey & Rodriguez, 2003, adapted from Zamparo et al. (2003); 6. Harrahium Witenberg, 1926 represented by H. halli (Harrah, 1922), adapted from Harrah (1922); 7. Uvitellina Witenberg, 1923 represented by Uvitellina himantopi Dronen & Tkach, 2013, adapted from Dronen & Tkach (2013); 8. Wardianum Witenberg, 1923 represented by Wardianum catoptrophori Dronen, 2007, adapted from Dronen (2007 b); 9. Haematotrephus Stossich, 1902 represented by Haematotrephus limnodromi Dronen, Gardner & Jiménez, 2006, adapted from Dronen et al. (2006 b). Abbreviations: C, cecum; G, genital pore; O, ovary; P, pharynx; S, rudimentary oral sucker; T, testis; U, uterus; V, vitelline field.