Cyclocoelum orientale subsp. eurhinus Tubangui, 1932

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 : 29

S. orientale eurhinus (Tubangui, 1932) n. comb.

Type host. Common greenshank, Tringa totanus (Linnaeus) (Syn. Totanus eurhinus Oberholaer ) ( Charadriiformes : Scolopacidae ).

Type locality. Obando, Bulacan, Luzon, Republic of the Philippines.

Previously proposed synonym. Cyclocoelum obscurum ( Leidy, 1887) —Tubangui (1932).

Remarks. This species was originally described as Cyclocoelum (Postpharyngeum) orientale var eurhinus Tubangui, 1932 , but this subspecies (variety) as originally described has an intertesticular ovary that forms a triangle with the testes (Cyclocoelinae), appears to have a post-pharyngeal genital pore and vitelline fields are described as not being confluent posteriorly (“separated only by excretory vesicle”), placing it in Selfcoelum . However, Fig. 1 of Plate 1 in the original description by Tubangui (1932) appears to show the vitelline fields as being confluent posteriorly, which would place this species in Psophiatrema. It differs from S. orientale ( Skrjabin, 1913) n. comb. in egg size (116–140 x 77 –79 compared to 147–151 x 78 –82) and likely represents a distinct species; however, corroboration of this species and its genus assignment is unlikely without access to deposited material. We could find only one specimen (#14) listed of this species in the Philippine Bureau of Science Parasitological Collection. We have included this subspecies (species) in the key to the species of Selfcoelum , and until there is resolution as to the posterior distribution of the vitelline fields, we have tentatively retained this subspecies in Selfcoelum . Although we feel it is likely not S. orientale ( Skrjabin, 1913) n. comb., because of taxonomic confusion we have not renamed this species. No oral or ventral sucker described—Tubangui (1932).

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.