Cichlidogyrus dionchus Paperna, 1968

Pariselle, Antoine & Euzet, Louis, 2009, Systematic revision of dactylogyridean parasites (Monogenea) from cichlid fishes in Africa, the Levant and Madagascar, Zoosystema 31 (4), pp. 849-898 : 862

Cichlidogyrus dionchus Paperna, 1968

Cichlidogyrus dionchus Paperna, 1968: 89 , 90, pl. 1, figs 4, 5.

Cichlidogyrus brevicirrus Paperna & Thurston, 1969: 17 , 18. — Paperna 1979: 9, 10.

TYPE MATERIAL. — Holotype: MRAC M.T. 35.585 from type host ( Paperna 1979).

TYPE HOST. — Of C. dionchus : Sarotherodon galilaeus (Linnaeus, 1758) . Of C. brevicirrus : Haplochromis guiarti (Pellegrin, 1904) .

TYPE LOCALITY. — Of C. dionchus : Mamahuma stream, Accra, Ghana. Of C. brevicirrus : Jinja, Kazi, Victoria Lake, Uganda.

ADDITIONAL HOSTS. — Of C. dionchus : Chromidotilapia guentheri (Sauvage, 1882) ( Paperna 1979) . Of C. brevicirrus : Haplochromis longirostris (Hilgendorf, 1888) , Haplochromis obesus (Boulenger, 1906) , Haplochromis obliquidens (Hilgendorf, 1888) , Haplochromis sp., Hoplotilapia retrodens (Hilgendorf, 1888) and Tilapia zillii (Gervais, 1848) .

SITE. — Gills.

ADDITIONAL LOCALITIES. — Afram sector, Volta Lake and Adutor lower reaches of the Volta River, Ghana on H.fasciatus ; Ghana on Chromidotilapia guentheri ( Paperna 1979) .

REMARKS

Paperna (1968) used for this species two spellings: C. dioncus and C. dionchus , as the first one was latter use by Paperna (1979) and other authors, we accept this spelling. Dossou & Birgi (1984) indicated that a proportion of individuals named C. dionchus by Paperna (1968: fig.6, p. 91) correspond to C. falcifer (individuals from Hemichromis fasciatus ) and we agree with that. Dossou (1982) indicated that C. dionchus (on Sarotherodon galilaeus ) is a valid species. Some hosts were added by Paperna (1979): Pseudocrenilabrus multicolor (Schoeller, 1903) , Tilapia rendalli (Boulenger, 1897) and Haplochromis wingatii (Boulenger, 1902) , but probably because of the presence of C. cf. brevicirrus , which was synonymised by this author with C. dionchus , when we propose to synonymise C. cf. brevicirrus with C. digitatus . In the same way, Paperna (1979) deposits a paratype (MRAC M.T. 35.586, probably C. cf. brevicirrus ) from Tilapia discolor (Günther, 1903) for C. dionchus , we consider this specimen as being a C. digitatus . In the original description by Paperna(1968) the only true C.dionchus was illustrated by the drawing 5 (pl. 1, p. 91) and by the figures of C. brevicirrus in its original description ( Paperna & Thurston 1969: 18), this latter species had been synonymised with C. dionchus by Paperna (1979); we agree with this conclusion.