Diplectanidae, Monticelli, 1903

Cohen, Simone Chinicz, Justo, Marcia Cristina Nascimento & Cárdenas, Melissa Querido, 2022, New records of Monogenoidea (Platyhelminthes) from three marine fish species from the coast of Angra dos Reis, Rio de Janeiro, Brazil, Zoologia (e 22024) 39, pp. 1-11 : 3

Diplectanidae

Acanthocercodes bullardi Kritsky & Diggles, 2015 Fig. 4 A-C

Host: Polydactylus virginicus (Linnaeus, 1758) ( Polynemidae ).

New record. Brazil, Atlantic Ocean – Rio de Janeiro State • coast of Angra dos Reis, “ Saco Piraraquara de Dentro ”; 23°00’24”S, 44°19’05”W; CHIOC 39724 .

Type-host: Polydactylus octonemus (Girard, 1858) ( Polynemidae ).

Type-locality: Gulf of Mexico, approximately 2 miles south of Cameron (Davis Road), south-west corner of Cameron Parish, Louisiana .

Description (based on 15 specimens). Body with cephalic region, trunk and elongate peduncle, 356–530 (425; n = 10) long by 80–170 (113; n = 10) wide. Four eye-spots. Tegument with scales extending from the eyespots region to the peduncle. Pharynx subspherical, 18–27 (22; n = 10) long by 20–27 (23; n = 10) wide. Intestinal caeca extending posteriorly to level of peduncle. Peduncle tapered and elongate with spines, peduncular spines 16–25 (20; n = 12) long by 16–25 (23; n = 12) wide. Dorsal and ventral squamodiscs with 10 rows of rodlets. Diplectanid haptor composed of ventral bar, paired dorsal bars and marginal hooks, ventral anchor with perpendicular superficial root, long deep root, elongate shaft, and short recurved point, 59–68 (63; n = 22) by 19–25 (22; n = 22) at base; dorsal anchor with short superficial root and inconspicuous deep root, straight shaft and recurved point, 54–62 (58; n = 23) by 17–25 (21; n = 23) at base. Ventral bar broadly U-shaped 75–103 (89; n = 13) long. Paired dorsal bar with tapered ends, 35–51(44; n = 25) long. Hooks 9–13 (11; n = 36). Male copulatory organ a short and broad tube, 34–52 (44; n = 10) long. Testes 60–90 (75; n = 10) long by 50–82 (66; n = 10) wide.

Figures

Figure 4. Acanthocercodes bullardi: (A) whole mount; (B) copulatory complex; (C) haptor. Scale bars: A = 150 Μm, B = 20 Μm, C = 50 Μm.