Systematic revision of dactylogyridean parasites (Monogenea) from cichlid fishes in Africa, the Levant and Madagascar Author Pariselle, Antoine Institut de Recherche pour le Développement, Laboratoire d’écologie et de systématique, Centre de Belair, BP 1386, 18524 Dakar (Sénégal) antoine. pariselle @ ird. fr pariselle@ird.fr Author Euzet, Louis Station méditerranéenne de l’Environnement littoral, Université Montpellier II, 1 Quai de la Daurade, F- 34200 Sète (France) euzet @ univ-montp 2. fr text Zoosystema 2009 2009-12-31 31 4 849 898 http://www.bioone.org/doi/abs/10.5252/z2009n4a6 journal article 8061 10.5252/z2009n4a6 d4ef2df1-7e15-49c7-9c1b-a2f1bf23af38 1638-9387 4520413 Genus Onchobdella Paperna, 1968 TYPE SPECIES. — Onchobdella voltensis Paperna, 1968 , by original designation. OTHER SPECIES INCLUDED. — Onchobdella aframae Paperna, 1968 ; O. bopeleti Bilong Bilong & Euzet, 1995 ; O. krachii Paperna, 1968 ; O. melissa Pariselle & Euzet, 1995 ; O. pterigyalis Paperna, 1968 ; O. silverai Pariselle & Euzet, 1995 ; O. spirocirra Paperna, 1968 . DIAGNOSIS (according to Pariselle & Euzet [1995a] ). — Ancyrocephalidae . Three pairs of cephalic glands. Two posterior ocellae with lenses, two small anterior ocellae. Intestinal caeca without diverticula, joined posteriorly. Two pairs of anchors: one large dorsal, one smaller ventral. Three transverse bars: one dorsal, two ventral well separated. Fourteen uncinuli of same length. Testis posterior inter-caecal.Vas deferens encircling left intestinal caeca. Seminal vesicle present. One prostatic reservoir. Male copulatory complex with penis and accessory piece. Median pre-testicular ovary. Vaginal opening lateral, dextral, sclerotised. Gill parasites on African cichlid fishes.