Morishitium feizullaevi, Feizullaev, 1980

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 : 74

M. feizullaevi ( Feizullaev, 1980) n. comb.

Type host. Black swan, Cygnus atratus (Latham) ( Anseriformes : Anatidae ).

Type localities. Russian Federation; specific type locality unknown.

Additional hosts. Mute swan, Cygnus olor (Gmelin) ; greylag goose, Anser anser (Linnaeus) ; bean goose, Anser fabalis (Latham) ; American Pekin duck, Anas platyrhynchos domestica Linnaeus (a form of mallard duck); gadwall, Anas strepera Linnaeus ; greater scaup, Aythya marila (Linnaeus) ( Anseriformes : Anatidae )— Feizullaev (1980).

Remarks. Feizullaev (1980) described a species, Prohyptiasmus robustus ( Stossich, 1902) , that he believed might be Cyclocoelum robustum Stossich, 1902 ; however, unlike C. robustum as originally described by Stossich (1902), the species described by Feizullaev (1980) had the intertesticular ovary in a straight line with the tandem testes (Hyptiasminae) and a postpharyngeal (Fig. 24a of Feizullaev 1980) rather than a prepharyngeal genital pore. Kanev et al. (2002a) apparently observed this difference and proposed a new genus, Neohyptiasmus (= Morishitium ) and renamed P. robustus of Feizullaev, 1980 as Neohyptiasmus feizullaevi Kanev, Radev & Fried, 2002, proposing N. feizullaevi as the type and only species in Neohyptiasmus. Dronen (2007a) considered Neohyptiasmus to be a synonym of Morishitium because the vitelline fields in M. feizullaevi ( Feizullaev, 1980) are not confluent posteriorly. No oral or ventral suckers described—Feizullaev (1980).