Dactylogyrus harpagatus, Guegan, Lambert & Euzet, 1989, Guegan, Lambert & Euzet, 1989

Musilová, Na Ď A, Ehulková, Eva Ř & Gelnar, Milan, 2009, Dactylogyrids (Platyhelminthes: Monogenea) from the gills of the African carp, Labeo coubie Rüppell (Cyprinidae), from Senegal, with descriptions of three new species of Dactylogyrus and the redescription of Dactylogyrus cyclocirrus Paperna, 1973, Zootaxa 2241, pp. 47-68 : 64-65

Dogielius harpagatus Guégan, Lambert & Euzet, 1989

( Figure 16 )

Type host and locality: Labeo coubie , Niger River (Bamako), Mali.

Other record: Labeo coubie, Baoulé River (Missira), Mali ( Guégan et al. 1989).

Present records: Labeo coubie , Gambia River near the hotel Simenti (sand beach 13° 01.543’N; 13º 17.471’W, gravel beach 13º 01.395’N; 13º 17.350’W), Mare de Simenti (13º 01.790’N; 13º 17.608’W), Gambia River near the Campement du Lion (13º 01.493’N; 13º 14.491’W), Niokolo-Koba National Park, Senegal.

Site: Gill lamellae.

Type specimen: Holotype MNHN HC 269.

Material examined: 4 unflattened and 10 flattened specimens in GAP.

Description: Body length 295 (215–339; n = 4); greatest width 84 (66–121; n = 4) usually near midlength. Haptor 72 (52–99, n = 4) long, 143 (112–155; n = 4) wide. Single pair of anchors (ventral): inner length 32 (31–33; n = 10); outer length 39 (38–41; n = 10); point length 22 (18–25; n = 10). One bar (ventral): 52 (50–55; n = 10) long, 10 (9–10; n = 10) wide. Hooks 7 pairs, slightly dissimilar in size; hook lengths (n = 5): pairs I, II, III, IV, V = 21 (19–22); pair VI = 22 (21–23); pair VII = 23 (23–24). Needles (1 pair) located near hooks of pair V. Vagina sclerotized, 17 (15–18; n = 10) long. Copulatory organ composed of a relatively straight tube and articulated accessory piece; total length 34 (33–35; n = 10); tube trace-length 29 (27–30; n = 10).

Remarks: The sclerotized structures reported in the original description of Dogielius harpagatus and those found on the present specimens correspond both in morphology and size. This species closely resembles Dogielius clavipenis in the morphology of the haptoral structures and the copulatory organ. However, it differs from it by having a simple copulatory base, i.e. without flap. Guégan et al. (1989) erroneously depicted this structure as proximal part of the accessory piece.

Figures

FIGURE 16. Dogielius harpagatus Guégan, Lambert & Euzet, 1989. A. anchor; B. ventral bar; C. hooks; D. needle; E. vagina; F. copulatory organ.