Cichlidogyrus halli ( Price & Kirk, 1967 )

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 : 865

Cichlidogyrus halli ( Price & Kirk, 1967)

Cleidodiscus halli Price & Kirk, 1967: 139-141 , figs 1-12. — Paperna 1979: 10.

Cichlidogyrus halli typicus Paperna, 1979: 11 , pl. 2, fig. 1. — Douëllou 1993: 160-164, fig. 3.

Cichlidogyrus tubicirrus magnus Paperna & Thurston, 1969: 26 , fig. 6a, e. — Paperna 1979: 10.

Cichlidogyrus magnus – Dossou 1982: 312-314, figs 24, 25. — Douëllou 1993: 160-164.

Cichlidogyrus halli victorianus Paperna, 1979: 11 , 12, pl. 2, figs 2, 3.

TYPE MATERIAL. — Of C. halli : Holotype: Albany Museum, Grahamstown , Republic of South Africa. Paratypes: Helminthological Collection , United States National Museum , Washington, DC ; MRAC, no numbers mentioned. Voucher specimen from type host: MNHN 126 HF ( Douëllou 1993).

Of C. halli typicus : Paratype: M.T. 35.511 from Oreochromis niloticus (only type specimen mentioned by Paperna 1979).

Of C. tubicirrus magnus : “ Types ”: private collection of Paperna, no number mentioned.

Of C. halli victorianus : Holotype: MRAC M.T. 35.941 from Oreochromis variabilis ( Paperna 1979) .

TYPE HOST. — Of C. halli and C. halli typicus : Oreochromis shiranus shiranus (Boulanger, 1897) (original host in Price & Kirk 1967).

Of C. tubicirrus magnus : Oreochromis niloticus (Linnaeus, 1758) .

Of C. magnus : Sarotherodon melanotheron Rüppel, 1852 (in Dossou 1982).

Of C. halli victorianus : Oreochromis variabilis (Boulenger, 1906) .

TYPE LOCALITY. — Of C. halli and C. halli typicus: Fort Johnston , Upper Shire River, Malawi.

Of C. tubicirrus magnus: Albert and Georges Lakes , Uganda.

Of C. magnus : Ouémé and Couffo, Bénin.

Of C. halli victorianus: Victoria Lake, Entebbe and Jinja, Uganda.

ADDITIONAL HOSTS. — C. halli : Oreochromis mortimeri (Trewavas, 1966) and Serranochromis macrocephalus (Boulenger, 1899) ( Douëllou 1993) . Sarotherodon occidentalis (Daget, 1962) ( Pariselle & Euzet 1997) .

C. halli typicus : Oreochromis niloticus (Linnaeus, 1758) , Sarotherodongalilaeus (Linnaeus, 1758), Oreochromisleucostictus (Trewavas, 1933), Oreochromis niloticus vulcani (Trewavas, 1933) and Oreochromis spilurus spilurus (Günther, 1894) . C. halli victorianus : Oreochromis esculentus (Graham, 1928) ( Paperna 1979) .

C. tubicirrus magnus : Sarotherodon galilaeus (Linnaeus, 1758) , Oreochromis leucostictus (Trewavas, 1933) .

SITE. — Gills.

ADDITIONAL LOCALITIES. — Of C. halli: Kariba Lake , Zimbabwe on Oreochromis mortimeri and Serranochromis macrocephalus ( Douëllou 1993) . Guinea and Sierra Leone on Sarotherodon occidentalis ( Pariselle & Euzet 1997) .

Of C. halli typicus : lakes Georges, Albert and Edward, Kajansi fish ponds, Uganda on O. niloticus ; Lake Albert, Uganda and Volta Lake and lower Volta River, Ghana on S. galilaeus ; lakes Georges and Albert; Uganda on O. leucostictus ; Kajansi fish ponds, Uganda on introduced O. niloticus vulcani and O. spilurus spilurus .

REMARKS

Price & Kirk (1967) synonymised Cichlidogyrus with Cleidodiscus Mueller,1934 ;this was confirmed by Price (1967). Price et al. (1969) rehabilitated Cichlidogyrus with five species ( C. arthracanthus , C. bifurcatus , C. bychowskii , C. longicirrus and C. tiberianus ), but kept in Cleidodiscus (valid genus) two species ( C. halli and C. tilapiae ). Paperna (1979) move back to Cichlidogyrus the two Cleidodiscus species found on African cichlid fishes ( C. halli and C. tilapiae ); this was confirmed by Douëllou (1993).

Considering measurements and figures by Paperna (1979:11, pl.2 figs 2, 3) and after the examination of type material, we did not find significant differences between C. halli victorianus and C. halli . So, despite the opinion of Douëllou (1993), we consider that C.h. victorianus had to be synonymised with C. halli .

The determination by Ergens (1981) of Tilapia zillii (Gervais, 1848) as host for C. halli in Egypt remains for us doubtful, in fact, this species is only found on mouthbreeders Cichlidae (i.e. genera Oreochromis and Sarotherodon ).