Chelediadema marjoriae, Miller, Terrence L. & Cribb, Thomas H., 2007

Miller, Terrence L. & Cribb, Thomas H., 2007, Two new cryptogonimid genera Beluesca n. gen. and Chelediadema n. gen. (Digenea: Cryptogonimidae) from tropical Indo-West Pacific Haemulidae (Perciformes), Zootaxa 1543, pp. 45-60 : 54

Chelediadema marjoriae n. sp.

( Fig. 6 )

Type host: Diagramma labiosum (Macleay) Perciformes , Haemulidae .

Additional hosts: Plectorhinchus albovittatus (Rüppell) ; P. gibbosus (Lacepède) .

Type locality: Heron Island, Great Barrier Reef (23°26’S; 151°54’E), Queensland, Australia.

Additional localities: Lizard Island, Great Barrier Reef (14°40’S; 145°27’E), Queensland, Australia.

Site: Intestine and pyloric caeca.

Prevalence: Diagramma labiosum , 7 of 43 (16%) at Heron Island, 0 of 7 at Lizard Island; P. albovittatus , 1 of 1 (100%) at Lizard Island; P. gibbosus , 1 of 1 (100%) at Lizard Island, 0 of 5 at Heron Island.

Deposited specimens: holotype G227677, nine paratypes G227678–G227686.

Etymology: The epithet marjoriae is in honour of Mrs Marjorie Neill in recognition of her support and encouragement of this work.

Description: Based on 10 specimens. Body lanceolate, longer than wide, 1150 (930–1368) long by 240 (195–309) wide; length/width ratio 4.9 (3.7–6.0). Oral sucker funnel-shaped, 117 (102–134) long by 92 (83– 106) wide. Oral spines 14 (14–15), length 32 (24–47). Ventral sucker 64 (56–69) long by 67 (54–75) wide. Ratio oral/ventral sucker width 1.37 (1.24–1.59). Forebody occupying 50 (46–53)% body length. Prepharynx 305 (227–381) long. Pharynx 67 (54–80) long by 66 (58–85) wide. Ventral sucker/pharynx width ratio 1.03 (0.87–1.11). Oesophagus 46 (26–70) long. Intestinal bifurcation at level of or immediately anterior to ventral sucker. Intestinal caeca blind, 591 (501–670) long, terminate close to posterior end of body. Testes two, tandem, adjacent, in mid-hindbody; anterior testis 106 (90–122) long by 112 (86–136) wide, posterior testis 122 (102–147) long by 111 (90–144) wide. Seminal vesicle saccular, between ovary and ventral sucker. Genital pore immediately anterior to ventral sucker. Ovary entire, anterior and adjacent to or ventral to anterior testis, 74 (67–80) long by 70 (58–90) wide. Laurer’s canal present. Seminal receptacle saccular, between ovary and ventral sucker. Vitelline follicles in two lateral groups, extend from level of ovary to pharynx. Uterine coils restricted to hindbody, extend from posterior end of body to ventral sucker. Eggs small, darkly tanned, 21 (18–24) long by 9 (7–11) wide. Excretory vesicle Y-shaped, bifurcates dorsal to ovary; arms extend to posterior end of pharynx, 661 (520–767) long.

Figures

FIGURE 6. Chelediadema marjoriae n. sp. from the intestine of Diagramma labiosum off Heron Island, Great Barrier Reef, Australia. Ventral view of holotype. Scale bar = 200 Μm.