Cichlidogyrus reversati Pariselle & Euzet, 2003

Jorissen, Michiel W. P., Pariselle, Antoine, Huyse, Tine, Vreven, Emmanuel J., Snoeks, Jos, Decru, Eva, Kusters, Thomas, Lunkayilakio, Soleil Wamuini, Bukinga, Fidel Muterezi, Artois, Tom & Vanhove, Maarten P. M., 2018, Six new dactylogyrid species (Platyhelminthes, Monogenea) from the gills of cichlids (Teleostei, Cichliformes) from the Lower Congo Basin, Parasite (Paris, France) 25 (64), pp. 1-21 : 15-16

Cichlidogyrus reversati Pariselle & Euzet, 2003

Type host: Tilapia cabrae Boulenger, 1899 (now Pelmatolapia cabrae ).

Other hosts: Coptodon tholloni (Poll & Thys van den Audenaerde, 1960) .

Infection site: Gills.

Type locality: Mouth of Bas Kouilou River , Congo .

Other localities: Congo River at Nganda Flash station 06° 02001.800 S 12° 31048.200 E.

Material: Eight whole-mounted specimens in Malmberg’s solution.

Vouchers: M. T. 38308–09, KN10043–45 https://laji.fi/en/ view?uri=luomus:KN.10043, https://laji.fi/en/view?uri=luomus: KN.10044, https://laji.fi/en/view?uri=luomus:KN.10045.

Remarks ( Table 3, Fig. 10 )

The eight recorded specimens of C. reversati from the Congo River had a dorsal bar length that was 9 µm longer on average and a total length of half the size compared with the specimens from the type locality. In the original drawing (see [33]), the accessory piece connected with the heel through a thin filament. However, this connection was not observed in the specimens from Lower Congo. In three specimens, an extension of the heel in another focal plane was observed and could correspond with the thin filamentous connection of the original description. Additionally, in three specimens, the distal ends of the accessory piece and the penis did not meet. Also, in all specimens, it was observed that the accessory piece has a ridge, which separates the distal hook from the C-shaped part. This ridge continues towards the basal bulb as a filament. Most proximally, it forms a separate structure that attaches separately to the basal bulb. This ridge was also observed on one paratype of C. reversati on the slide RMCA37.402 . However, the paratypes lost transparency due to the fixation in Malmberg’s and were difficult to observe in detail. On the seven other paratypes and vouchers, all collected by Pariselle & Euzet (2003) and deposited at the Royal Museum for Central Africa, Tervuren, Belgium, these structures were not observable. Because of this, the holotype, prepared with the same fixative, was not ordered from the Muséum national d’Histoire naturelle in Paris .

Figures

Figure 10. Haptoral and genital hard parts of Cichlidogyrus reversati from Coptodon tholloni. Accessory piece of the MCO in grey, to highlight the plate-like structure of the accessory piece. I–VII, hooks; AP, accessory piece; DA, dorsal anchors; DB, dorsal transverse bar; MCO, Male Copulatory Organ; Pe, penis; VA, ventral anchors; VB, ventral transverse bar. Scale bar: 20 µm.