Dactylogyrus cyclocirrus Paperna, 1973

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 : 57-58

Dactylogyrus cyclocirrus Paperna, 1973

( Figure 8 II)

Type host and locality: Labeo cylindricus, Ruaha River, Tanzania. Site: Gill lamellae.

Type specimens: Dactylogyrus cyclocirrus Paperna, 1973 : Lectotype circled on the slide RMCA M.T. 35.699; 11 paralectotypes RMCA M.T. 35.699.

Material examined: Dactylogyrus cyclocirrus Paperna, 1973: 12 syntypes RMCA M.T. 35.699 from L. cylindricus (see Paperna 1979).

Redescription: Body length 405 (366–422; n = 4); greatest width 117 (101–138; n = 4). Single pair of anchors (dorsal): inner length 27 (24–28; n = 5); outer length 30 (29–32; n = 5); inner root 10 (9–11; n = 5) long; outer root 9 (9–10; n = 5) long; shaft straight, with relatively wide proximal part; point 12 (12–13; n = 5) long. One bar (dorsal): 25 (23–27; n = 4) long, 4 (4–5; n = 4) wide, with swollen medial part. Hooks 7 pairs, dissimilar in size; hook lengths (n = 2): pair I = 15–16; pairs II–VII = 11–12. Needles (1 pair) located near hooks of pair V. No sclerotized vagina observed. Copulatory organ a coiled wide tube of about 1.5 rings, with relatively wide distal end; total length 32 (30–35; n = 5); tube trace-length 64 (62–69; n = 5). Accessory piece slightly sclerotized, articulated to base.

Remarks: This species was redescribed based on our re-examination of the 12 syntypes (RMCA M.T. 35.699) from L. cylindricus (see also Remarks for D. yassensis ). The lectotype represents the specimen drawn by us in Fig. 8 II; all other specimens in the original series thus become paralectotypes. In view of the fact that Paperna (1979) did not include in the original description of D. cyclocirrus morphometrical features of specimens collected on L. coubie and L. senegalensis from Ghana, we consider these host and geography records as doubtful. Therefore, we did not depict these 2 hosts as “Other records”.

Figures

FIGURE 8. I. Dactylogyrus sp. from Labeo victorianus originally described by Paperna (1973) as D. cyclocirrus (one of the specimens on the slide RMCA M. T. 35.700). A. anchor; B. ventral bar; C. dorsal bar; D. hooks; E. copulatory organ. II. Dactylogyrus cyclocirrus Paperna, 1973 from Labeo cylindricus (lectotype circled on the slide RMCA M. T. 35.699). A. anchor; B. dorsal bar; C. hooks; D. copulatory organ. Needles not observed.