Euryhaliotrema carbunculus ( Hargis, 1955 ), 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 : 24

Euryhaliotrema carbunculus ( Hargis, 1955)

n. comb.

( Fig. 8 )

Pseudohaliotrema carbunculus Hargis, 1955: 189 , 190.

Pseudohaliotrema (P.) carbunculus – Yamaguti 1963.

TYPE HOST AND LOCALITY. — Gills of Lagodon rhomboides (Sparidae) : Alligator Harbor, Franklin Co., Florida ( Hargis 1955).

MATERIAL EXAMINED. — Holotype ( USNPC 49340 ); eight paratypes ( USNPC 49340 , 49341 ).

MEASUREMENTS

Body 362 (338-382; n = 5) long, fusiform; greatest width 64 (52-74; n = 5) at level of testis; pharynx 21 (19-25; n = 7) in diameter; haptor 79 (69-96; n = 6) wide, 65 (59-71; n = 6) long; ventral anchor 38 (36-42; n = 6) long, base 16 (14- 17; n = 3) wide; dorsal anchor 50 (48-53; n = 7) long, base 15 (13-16; n = 5) wide; ventral bar 37 (34-41; n = 6) long, dorsal bar 35 (31-39; n = 6) long; hook 13-14 (n = 7) long, FH loop about shank length; copulatory organ 115 (n = 1) long, coil counterclockwise, ring diameter 22 (20-23; n = 2); accessory piece 18 (17-20; n = 2) long; testis 29 (n = 1) long, 14 (n = 1) wide; germarium 36 (32-39; n = 3) long, 18 (14-23; n = 3) wide; vaginal aperture marginal.

REMARKS

In the original description of this species as Pseudohaliotrema carbunculus, Hargis (1955) did not report the presence of an articulated copulatory organ and accessory piece via a short articulation process. The original whole-mount drawing of the holotype ( Hargis 1955: fig. 42) suggests that a loop of the vas deferens and the proximal portion of the seminal vesicle lie dorsal to the left cecum. Unfortunately, we could not confirm the course of the vas deferens in available type specimens, but suggest that male duct does loop the left cecum based on findings in other species of Euryhaliotrema . All other features of the species support the transfer of P. carbunculus to Euryhaliotrema n. gen. Thus, E. carbunculus n. comb. is proposed.

Figures

FIG. 8. — Euryhaliotrema carbunculus (Hargis, 1955) n. comb.; A, whole mount (dorsal view); B, copulatory complex (dorsal view); C, hook; D, vagina (dorsal view); E, ventral bar; F, dorsal bar; G, ventral anchor; H, dorsal anchor. Scale bars: A, 100 µm; B-H, 25 µm.