Uvitellina pseudocotylea Witenberg 1923

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 : 40-43

Uvitellina pseudocotylea Witenberg 1923 — Type species

Type host. “Stilt”, Himantopus candidus (Bonnaterre) (Not a valid bird species. There are two species of Himantopus Brisson world wide: the black-winged or common stilt, Himantopus himantopus [Linnaeus], and the black-necked stilt, H. mexicanus [Müller] [ Charadriiformes : Recurvirostridae ], and only H. himantopus would likely be present in the Russian Federation or Japan)— Chertkova et al. (1994).

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

Additional hosts. Long-billed plover, Charadrius placidus Gray & Gray ( Charadriiformes : Charadriidae )— Yamaguti (1958, 1971), Uchida et al. (1991); little ringed plover, Charadrius dubius Scopoli ( Charadriiformes : Charadriidae )—Cordero del Campillo et al. (1980).

Additional localities. Japan—Yamaguti (1958; 1971); Uchida et al. (1991); Andalusia, Spain—Cordero del Campillo et al. (1980); Asian USSR ( CIS)— Chertkova et al. (1994).

Remarks. Joyeux & Baer (1927) considered this species to be Cyclocoelum pseudocotyleum ( Witenberg, 1923) and Uvitellina magniembria Witenberg, 1923 to be a synonym of Cyclocoelum pseudocotyleum . Rudimentary oral sucker present (“The mouth leads into a small funnel-shaped hollow, on the dorsal wall of which there is a structure that appears as an excellent part of a powerful suction cup-like muscle ring.”)— Witenberg (1923); Witenberg (1926) and Bashkirova (1950).

Estimated frοm figure in οriginal descriptiοn. 2Measurements frοm Bashkirοva (1950).

= Nοt present. 1Estimated frοm figure in οriginal descriptiοn.

Type host. Black-winged or common stilt, Himantopus himantopus Linnaeus (Syn. White-headed stilt, Himantopus leucocephalus Gould ) ( Charadriiformes : Recurvirostridae ).

Type locality. South Australia, specific type locality unknown.

Additional hosts. Northern lapwing, Vanellus vanellus (Linnaeus) ( Charadriiformes : Charadriidae )— Tseng (1930); Yamaguti (1971). NHMUK on-line Host-Parasite Database lists 5 avian host species for U. adelphus and 1 avian host species ( H. leucocephalus ) for Haematotrephus adelphus Johnston, 1917 .

Additional localities. Nanjing (previously Nanking), People’s Republic of China—Tseng (1930); Republic of Azerbaidzhan; specific type locality unknown—Yamaguti (1971).

NHMUK on-line Host-Parasite Database lists 4 localities and 8 references for U. adelphus and 1 locality (South Australia) and 1 reference ( Johnston 1917) for H. adelphus .

Remarks. Originally described as Haematotrephus adelphus Johnston, 1917 , this species was considered to be a synonym of Haematotrephus lanceolatum ( Wedl, 1858) by Dubois (1959). It was transferred to Uvitellina by Witenberg (1928), but it was maintained in Haematotrephus by Yamaguti (1971). This species has a pretesticular ovary that forms a triangle with the testes (Haematotrephinae), a postpharyngeal genital pore and the vitelline fields are confluent posteriorly, placing it in Uvitellina as suggested by Witenberg (1928). Uvitellina dollfusi ( Tseng, 1930) was originally described as Cyclocoelum (Uvitellina) dollfusi Tseng, 1930 , but was considered to be in Uvitellina by Bashkirova (1950) and Dubois (1965). Uvitellina dollfusi was considered to be a synonym of Cyclocoelum (Haematetrophus) vanelli ( Rudolphi, 1819) (= Uvitellina vanelli [ Rudolphi, 1819]) by Dubois (1965). The ovary in U. dollfusi is located opposite to the anterior testis (pretesticular) forming a triangle with the testes (Haematotrephinae), the genital pore is postpharyngeal and the vitelline fields are confluent posteriorly (see Fig. 2 of the original description), placing it in Uvitellina as suggested by Bashkirova (1950). It should be noted that Fig. 1 of the original description shows the vitelline fields to be not confluent posteriorly and the testes are diagonal, which would place this species in Haematotrephus where Yamaguti (1971) placed it. Tseng (1930) indicated that the confluence of the vitelline fields posteriorly could not be seen in a dorsal view ( Fig. 1 ), but was visible from a ventral view ( Fig. 2 ). The mouth is described as “mouth (391 Μ), limited (or surrounded) by a weak musculature”, which suggests that an oral sucker is present—Tseng (1930). Uvitellina dollfusi is virtually identical to U. adelphus and both species were reported from species of charadriiform birds. Although U. dollfusi was described from China and U. adelphus from Australia, we consider U. dollfusi to be a synonym of U. adelphus . Rudimentary oral sucker present—Johnston (1917).

Figures

FIGURES 1 – 4. Diagrammatic representations of species representing the genera assigned to Cyclocoelinae Stossich, 1902. 1. Cyclocoelum Brandes, 1892 represented by Cyclocoelum mutabile (Zeder, 1800), adapted from Kossack (1911); 2. Selfcoelum Dronen, Gardner, & Jiménez, 2006 represented by Selfcoelum limnodromi Dronen, Gardner, & Jiménez, 2006, adapted from Dronen et al. (2006 a); 3. Psophiatrema Dronen & Kinsella, 2009 represented by Psophiatrema greineri Dronen & Kinsella, 2009, adapted from Dronen & Kinsella (2009); 4. Circumvitellatrema Dronen, Greiner, Ialeggio & Nolan, 2009 represented by Circumvitellatrema momota Dronen, Greiner, Ialeggio & Nolan, 2009, adapted from Dronen et al. (2009). Abbreviations: C, cecum; G, genital pore; O, ovary; P, pharynx; S, rudimentary oral sucker; T, testis; U, uterus; V, vitelline field.