Cichlidogyrus gillesi, Pariselle, Antoine, Bitja Nyom, Arnold R. & Bilong Bilong, Charles F., 2013

Pariselle, Antoine, Bitja Nyom, Arnold R. & Bilong Bilong, Charles F., 2013, Checklist of the ancyrocephalids (Monogenea) parasitizing Tilapia species in Cameroon, with the description of three new species, Zootaxa 3599 (1) : -

Cichlidogyrus gillesi n. sp.

( Fig. 4 )

Type host: Tilapia guineensis (Günther) .

Site: Gills.

Type locality: Lake Ossa, Cameroon (3°47’24”N; 10°01’22” E).

Specimens deposited: Holotype and 4 Cichlidogyrus digitatus Dossou, 1982 MNHN n° HEL 276. Paratypes MNHN (1) n° HEL 277 [note that on the same slide there are 3 voucher specimens of Cichlidogyrus digitatus Dossou, 1982 and 1 Cichlidogyrus bilongi Pariselle & Euzet, 1996 ]; NHMUK (1) n° 2012.8.30.3 [note that on the same slide there are voucher specimens of Cichlidogyrus digitatus Dossou, 1982 (3) n° 2012.8.30.5 and Cichlidogyrus aegypticus Ergens, 1981 (1) n° 2012.8.30.6]; RMCA (1) n° 37704 [on the same slide there are voucher specimens of Cichlidogyrus digitatus Dossou, 1982 (5) n° 37705 and Cichlidogyrus cubitus Dossou, 1982 (2) n° 37706].

Etymology: N amed after Dr André Gilles (Marseille University) who studied fish genetics as part of the ANR program.

Description (based on 8 individuals): adults 417 (347–463) (8) long. 94 (80–106) (8) large at level of penis. Pharynx globular 33 (28–37) (8) in diameter. Short dorsal anchor with guard two times longer than shaft and a regularly curved blade: a = 25 (24–27) (16), b = 20 (18–23) (16), c = 5 (4–6) (16), d = 10 (6–11) (16), e = 9 (8–11) (16). Regularly arched and long dorsal transverse bar, tapering toward the extremities: x = 39 (32–46) (8), w = 4 (3–5) (8), y = 14 (12–16) (8), h = 16 (13–19) (15). Ventral anchor same shape as dorsal, but slightly larger: a = 30 (29–31) (15), b = 26 (23–28) (16), c = 5 (4–7) (16), d = 12 (10–14) (15), e = 11 (10–12) (16). V–shaped and thin ventral transverse bar, branches straight: x = 35 (31–39) (16), w = 5 (4–6) (8). First uncinuli of small size, third to seventh long: U I = 15 (14–16) (14), U II = 12 (11–13) (13), U III = 34 (32–36) (13), U IV = 38 (36–40) (12), U V = 39 (37–40) (12), U VI = 35 (34–38) (14), U VII = 32 (31–33) (13). Male copulatory complex made up of a curved and strong penis, tapering towards its extremity, starting perpendicularly as a large ovoid bulb, a very large trapezoid heel, and a S-shaped accessory piece ending in a large hook with 7–8 tubercles and a triangular expansion on its convex face: Pe = 57 (54–62) (8), He = 13 (10–16) (8), AP = 39 (35–43) (8). Short, S–shaped vagina with thick and wrinkled wall: x = 17 (12–29) (7), w = 3 (2– 3) (7).

Remarks: Considering the morphology of the U 1 of small size, and U III to U VII long, of the MCC (penis with perpendicular and large proximal bulb, S-shaped accessory piece without associated auxiliary plate), and the presence of a sclerotised vagina, C. gillesi n. sp. resembles Cichlidogyrus anthemocolpos Dossou, 1982 ; Cichlidogyrus bonhommei Pariselle & Euzet, 1998 ; Cichlidogyrus bouvii Pariselle & Euzet, 1997 ; Cichlidogyrus dossoui Douëllou, 1993 ; Cichlidogyrus douellouae Pariselle, Bilong Bilong & Euzet, 2003 ; Cichlidogyrus ergensi Dossou, 1982 ; Cichlidogyrus flexicolpos Pariselle & Euzet, 1995 ; Cichlidogyrus hemi Pariselle & Euzet, 1998 ; Cichlidogyrus kouassii N’Douba, Thys van den Audenaerde & Pariselle, 1997; Cichlidogyrus legendrei Pariselle & Euzet, 2003 ; Cichlidogyrus lemoallei Pariselle & Euzet, 2003 ; Cichlidogyrus ouedraogoi Pariselle & Euzet, 1996 ; Cichlidogyrus tiberianus and Cichlidogyrus vexus Pariselle & Euzet, 1995 . The new species could be distinguished from all these others by the size and shape of the heel of the penis (large, trapezoid) and as well as that of the vagina (S-shaped, large and wrinkle walled).

Figures

FIGURE 4. Hard parts of Cichlidogyrus gillesi n. sp. Ap, accessory piece; He, heel; Pe, penis. DA, dorsal anchor. DB, dorsal transverse bar. VA, ventral anchor. VB, ventral transverse bar. Vg, vagina. I – VII, uncinuli (scale bar = 30 µm).