Cichlidogyrus mvogoi, Pariselle, Antoine, Bitja Nyom, Arnold R. & Bilong Bilong, Charles F., 2014

Pariselle, Antoine, Bitja Nyom, Arnold R. & Bilong Bilong, Charles F., 2014, Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon, Zootaxa 3881 (3), pp. 258-266 : 260

Cichlidogyrus mvogoi n. sp.

( Fig. 2 )

Type host. Sarotherodon mvogoi (Thys van den Audenaerde).

Site. Gills.

Type locality. Nyong River at Ayos, Cameroon (03°54'46" N; 12°30'25" E).

Other locality. Soo River at NkolSo’o, Cameroon (03°19'21" N; 11°28'51" E).

Specimens deposited. Holotype n° 37780 and 10 paratypes n° 37781 RMCA; 10 paratypes n° HEL 514 MNHN.

Etymology. Named after the host species.

Description (based on 24 individuals). Adults 684 (564–881, 24) long. 133 (113–163, 24) wide at level of ovary. Pharynx globular 31 (27–36, 24) in diameter. Dorsal anchor with guard four times longer than shaft and regularly curved blade: a = 42 ± 1.3 (39–45, 47), b = 35 ± 1.3 (32–37, 47), c = 3 ± 0.5 (2–4, 47), d = 12 ± 0.9 (11–14, 47), e = 10 ± 0.8 (8–11, 47). Arched dorsal transverse bar: x = 31 (27–38, 23), w = 7 (6–9, 24), y = 14 (11–16, 23), h = 14 ± 0.9 (12–16, 48). Ventral anchor similar to dorsal one but slightly larger: a = 45 ± 1.4 (42–48, 47), b = 39 ± 1.1 (37–42, 47), c = 3 ± 0.6 (2–4, 47), d = 12 ± 1 (9–14, 47), e = 12 ± 1 (10–14, 47). V–shaped ventral transverse bar, branches straight: x = 30 ± 1.4 (27–33, 48), w = 6 (5–8, 24). First and third to seventh marginal hook short: Mh I = 13 ± 0.4 (12–14, 43), Mh II = 11 ± 0.6 (10–12, 38), Mh III = 15 ± 0.7 (13–17, 44), Mh IV = 18 ± 0.6 (17–19, 41), Mh V = 21 ± 0.9 (19–23, 44), Mh VI = 19 ± 0.8 (17–20, 41), Mh VII = 15 ± 0.6 (13–16, 37). Very long and thin spirally coiled (2 turns) penis (not easy to measure) starting in a bulb with marked heel, accessory piece complicated: Pe = 280 (213–317, 21), He = 8 (6–10, 24), AP = 44 (37–51, 24). Very long and thin spirally coiled vagina (double pitch), no valuable length could be taken.

Remarks. Cichlidogyrus mvogoi n. sp. is the only member of this genus which shows the combination of a long (> 100 µm), thin and spirally coiled penis and a short marginal hook pair I. All other species with a penis of that length have Mh 1 of medium size ( Cichlidogyrus arthracanthus Paperna, 1960 ) or of large size ( Cichlidogyrus euzeti Dossou & Birgi, 1984 , Cichlidogyrus longicirrus Paperna, 1965 and Cichlidogyrus sanseoi Pariselle & Euzet, 2004 ).

Figures

FIGURE 2. Haptoral and genital hard parts of Cichlidogyrus mvogoi n. sp.. Ap, accessory piece; DB, dorsal transverse bar; DA, dorsal anchor; He, heel; Pe, penis; VA, ventral anchor; VB, ventral transverse bar; Vg, vagina; I to VII, marginal hooks. Scale bar = 20 µm.