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.