Euryhaliotrema tubocirrus ( Zhukov, 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 : 33

Euryhaliotrema tubocirrus ( Zhukov, 1976) n. comb.

Haliotrema tubocirrus Zhukov, 1976: 40 , 41.

MATERIAL EXAMINED. — Two voucher specimens from Lutjanus synagris, Gulf of Campeche (Gulf of Mexico) ( USNPC 91431).

PREVIOUS RECORDS. — Gills of Lutjanus analis , Lutjanus apodus , Lutjanus cyanopterus , Lutjanus synagris (type host), Rhomboplites aurorubens (Lutjanidae) : Havana and Gulf of Campeche (Gulf of Mexico) ( Zhukov 1976). According to Timofeeva (personal communication), the holotype of E. tubocirrus n. comb. was collected from L. synagris .

MEASUREMENTS

Copulatory organ ring diameter 28-29 (n = 1); accessory piece 27-28 (n = 1) long; ventral anchor 29 (28-31; n = 2) long, base 15-16 (n = 1) wide; dorsal anchor 31-32 (n = 2) long, base 15-16 (n = 1) wide; dorsal bar 33 (31-36; n = 2) long; hook 14-15 (n = 3) long.

REMARKS

This species requires redescription. The two specimens from Zhukov’s collection, both damaged, flattened and cleared, were unsuitable for determination of internal features. The vaginal aperture is apparently dextroventral; the tube of the copulatory organ has a bulbous base and appears to be enclosed within a tissue sheath; the accessory piece is clavate and apparently not articulated to the bulbous base of the copulatory organ; the anchors have well-developed roots; and the hook has an upright acute thumb and slender shank composed of one subunit. Based on these observations, this species is transferred to Euryhaliotrema n. gen. as E. tubocirrus n. comb. Euryhaliotrema tubocirrus n. comb. is similar to E. torquecirrus n. comb. but differs from it in having a sheath surrounding the tube of the copulatory organ.