Haematotrephus jaenschi Johnston & Simpson, 1940

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 : 54

H. jaenschi ( Johnston & Simpson, 1940) n. comb.

Type host. Hoary-headed grebe, Poliocephalus poliocephalus (Jardine & Selby) ( Podicipediformes : Podicipedidae )— Storer (2000).

Type locality. Tailem Bend, lower Murray River, South Australia.

Additional host. Australian grebe, Tachybaptus novaehollandiae (Stephens) (Syn. Podiceps novaehollandiae Stephens ) ( Podicipediformes : Podicipedidae )— Johnston & Simpson, (1940), Storer (2000).

Remarks. This species was originally described as Cyclocoelum jaenschi Johnston & Simpson, 1940 , but was transferred to Corpopyrum (= Haematotrephus ) by Yamaguti (1958). This species has a pretesticular ovary that forms a triangle with the testes (Haematotrephinae), a postpharyngeal genital pore, the vitelline fields are not confluent posteriorly and the testes are diagonal to tandem, placing it in Haematotrephus . Although this species was described as lacking a ventral sucker as an adult, the cercarium is illustrated as having a rudimentary ventral sucker by Johnston & Simpson (1940).