Euryhaliotrema bychowskyi ( Obodnikova, 1976 ) 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 : 26-29

Euryhaliotrema bychowskyi ( Obodnikova, 1976) n. comb.

( Fig. 10 A-G) Haliotrema bychowskyi Obodnikova, 1976: 89-91 . TYPE HOST AND LOCALITY. — Gills of Hapalogenys mucronatus (Haemulidae) : Yellow Sea (Chifu, sic) ( Obodnikova 1976). MATERIAL EXAMINED. — Four paratypes (ZIAC 2938, 2945).

A

REDESCRIPTION

Body 858 (683-1189; n = 4) long, flattened dorsoventrally; greatest width 285 (243-356; n = 4) at level of posterior end of testis. Cephalic region broad; cephalic lobes moderately to well developed. Eyes dissociated; accessory granules in narrow band anterior to pharynx. Pharynx spherical, 63 (54-68; n = 4) in greatest width. Peduncle short, tapering posteriorly; haptor subtrapezoidal, 150 (120-189; n = 4) wide, 106 (82-121; n = 4) long. Ventral anchor 74 (72-75; n = 4) long, with short roots, short evenly curved shaft, point reaching level of tip of superficial root; base 40 (39-41; n = 2) wide. Dorsal anchor 82 (80-83; n = 4) long, with large base, elongate superficial root, short deep root, evenly curved short shaft, point reaching level of tip of superficial root; base 39 (34-43; n = 2) wide. Ventral bar 60 (50-69; n = 4) long, yoke shaped, with anteromedial protuberance, posterior shield absent; dorsal bar 56 (50- 62; n = 4) long, straight, with bilateral subterminal posterior bosses. Hook 14 (13-16; n = 7) long, shank uniform; FH loop about shank length. Copulatory organ 75 (72-80; n = 3) long, with coil of about one and a half counterclockwise rings; coil diameter 17 (15-19; n = 4). Accessory piece 35 (32-38; n = 3) long, comprising two subunits forming pincher-like claw, lacking articulation process. Testis 349 (313-386; n = 2) long, 144 (138-149; n = 2) wide; seminal vesicle forming C-shaped loop posterior to base of copulatory organ; prostatic reservoir lying within loop of seminal vesicle. Germarium 182 (163-201; n = 2) long, 80 (72- 89; n = 2) wide, elongate pyriform, usually proximally lobed, overlying anterior end of testis; oviduct, ootype not observed; uterus delicate, ventral. Vaginal aperture marginal; vaginal canal short, straight, indenting seminal receptacle. Seminal receptacle elongate, extending to near dextral body margin anterior to germarium. Vitellaria dense.

REMARKS

This species is sister to E. sagmatum n. gen., n. sp. Differentiation of these species is provided in the Remarks for E. sagmatum n. gen., n. sp. The present species possesses all of the characters defining Euryhaliotrema n. gen. and its transfer as E. bychowskyi n. comb. is proposed.

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.