Haematotrephus nigropunctatum

H. nigropunctatum (von Linstow, 1883) n. comb.

Type host. “Akatza” (unknown species). Listed as being from “ Numineus arcuatum ” (unknown species, but likely a typo)— Witenberg (1923). This host species was likely the Eurasian or common curlew, Numenius arquata (Linnaeus) (Charadriiformes: Scolopacidae).

Type locality. Turkestan, Russian Federation; specific type locality unknown.

Previously proposed synonym. Cyclocoelum (Postpharyngeum) ovopunctatum (Stossich, 1902) — Witenberg (1923).

Remarks. von Linstow (1883) provided a minimal description without figures of Monostomum nigropunctatum von Linstow, 1883, but this species was transferred to Corpopyrum (= Haematotrephus) by Witenberg (1923), and maintained in Corpopyrum byYamaguti (1971). Witenberg (1923, 1926) provided additional information on the species, but also did not illustrate it. The only measurements available for this species are a body size (11,000 x 2,500) and the size of an egg (170 x 80)— Yamaguti (1971) and it therefore could not be included in our keys of species. We consider it to be a species inquirenda. It has a pretesticular ovary that forms a triangle with the diagonal testes (Haematotrephinae), the genital pore is postpharyngeal and the vitelline fields are not confluent posteriorly, placing it in Haematotrephus. It is noteworthy that this species is similar to Haematotrephus fasciatus Stossich, 1902 by lacking an oral sucker and apparently was reported from the same host species (Numenius arquata) from generally the same geographical region (Russia vs Europe); however, the egg sizes for H. fasciatus were not reported. No oral or ventral sucker described—von Linstow (1883); Witenberg (1923).