Euryhaliotrema paralonchuri ( Lugue & Iannacone, 1989 ) Kritsky & Boeger, 2002

Kritsky, Delane C. & Boeger, Walter A., 2002, 41: New and previously described species of Dactylogyridae (Platyhelminthes) from the gills of marine and freshwater perciform fishes (Teleostei) with proposal of a new genus and a hypothesis on phylogeny, Zoosystema 24 (1), pp. 7-40 : 29

Euryhaliotrema paralonchuri ( Lugue & Iannacone, 1989) n. comb.

( Fig. 10 H-N)

Pseudohaliotrema paralonchuri Lugue & Iannacone, 1989: 545-547 .

HOST AND LOCALITY. — Gills of Paralonchurus peruanus (Sciaenidae) : Litoral de Lima, Peru, 12°30’S, 76°50’W.

MATERIAL EXAMINED. — Two paratypes ( USNPC 81341 ) ; two voucher specimens ( USNPC 91426 ) .

PREVIOUS RECORD. — Paralonchurus peruanus (Sciaenidae) : Fish Market at Chorrillos, Lima, Perú ( Lugue & Iannacone 1989).

MEASUREMENTS

Measurements of our specimens follow those of the two paratypes in brackets. Body fusiform; ventral anchor 30 (29-31; n = 2) (31 [29-32; n = 3]) long, base 15-16 (n = 2) (19 [18-20; n = 3]) wide; dorsal anchor 31 (30-32; n = 2) (29-30 [n = 3]) long, base 18 (17-19; n = 2) (16 [15-18; n = 3]) wide; hook 14 (13-15; n = 6) (13- 14 [n = 6]) long, FH loop about shank length; copulatory organ 149 (145-153; n = 2) (128 [113-143; n = 2]) long; coil counterclockwise, diameter 23 (22-25; n = 2) (30 [28-31; n = 2]); vaginal aperture marginal.

REMARKS

Our specimens and the paratypes of E. paralonchuri n. comb. are unstained and cleared and are unsuitable for redescription of the species. Lugue & Iannacone (1989) originally placed this species in Pseudohaliotrema . Based on the presence of a bulbous base of the copulatory organ, however, it is clearly a member of Euryhaliotrema n. gen., where it serves as sister species to E. atlantica n. gen., n. sp. Thus, E. paralonchuri n. comb. is proposed. Differentiation of E. paralonchuri n. comb. and E. atlantica n. gen., n. sp. is provided in the Remarks for the latter species.

Figures

FIG. 10. — Sclerotized structures of Euryhaliotrema n. gen. species; A-G, Euryhaliotrema bychowskyi (Obodnikova, 1976) n. comb.; A, ventral anchor; B, vagina (ventral view); C, hook; D, copulatory complex (ventral view); E, dorsal anchor; F, ventral bar; G, dorsal bar; H-N, Euryhaliotrema paralonchuri (Lugue & Iannacone, 1989) n. comb; H, vagina (ventral view); I, hook; J, ventral bar; K, copulatory complex (ventral view); L, dorsal anchor; M, dorsal bar; N, ventral anchor. Scale bar: 25 µm.