Review of the genus Guaranidrilus (Oligochaeta, Enchytraeidae) with the description of two new species Brenda Healy Zoological Department, University College, Dublin Synopsis Guaranidrilus Cernosvitov, 1937 was erected to contain three new species from Argentina, G. glandulosus, G. rams and G. fridericoides nom. nud. and a species of doubtful affinity, G. (Henlea) columbianus from Columbia. Only one other species, G. lamottei from Africa, has since been described. Although G. fridericoides was never described, re-examination of Cernosvitov's specimens reveals that the species is distinctive. The genus is emended and two new species are described: G. cernosvitovi sp. nov. (for G. fridericoides nom. nud.) and G. europeus sp. nov. from France and Spain. Introduction The genus Guaranidrilus was erected by Cernosvitov (1937a) to include four species: G. glandu-losus, G. rarus and G. fridericoides, new species from Argentina; and G. columbianus (Michaelsen, 1913) from Columbia. The new species were not described at the time but subsequently descrip-tions were provided for two, G. glandulosus and G. rarus, together with a redefinition of the genus (Cernosvitov, 19376). The third, G. fridericoides, has never been described so the name does not fulfil the requirements of Article 13a of the International Code of Zoological Nomen-clature and is considered to be a nomen nudum. Only one other species has been recorded, G. lamottei Omodeo, from the Ivory Coast (Omodeo, 1958). Recently new material of Guarani-drilus was collected from France and Spain and led to an investigation of the genus. Re-examina-tion of Cernosvitov's material of G. fridericoides in the British Museum (Natural History) showed that the species is distinct and a description is given in this paper together with details of a new species from S.W. France and the Pyrenees. The three previously recorded localities of Guaranidrilus lie between 8 N and 27 S, thus the genus appears to have a mainly tropical distribution. Cernosvitov (19376) expressed the opinion that the genus is probably widely distributed in both tropical and subtropical parts of South America, although he presented no evidence to support this view. The discovery of a new species in south-west France and the Pyrenees is of special interest because it extends the known geographical range of Guaranidrilus. This new European species displays the essential characteristics of the genus but departs in two respects from Cernosvitov's diagnosis : a seminal vesicle is absent and there are no oesophageal glands. Similarly G. lamottei also exhibits characters not shared with Cernosvitov's species. The inclusion of these Old World species makes it necessary to emend the genus. GUARANIDRILUS Cernosvitov, 1937 (emended) TYPE SPECIES. G. glandulosus Cernosvitov, 1937 (designated by Brinkhurst & Jamieson, 1971). DIAGNOSIS. Setae straight, without nodulus, two per bundle. Head pore at the tip of the pros-tomium; dorsal pores absent. Three pairs of septal glands united dorsally, all with ventral lobes. Sudden transition between oesophagus and intestine with a pair of bilobed intestinal diverticula at the oesophago-intestinal transition. Dorsal vessel originating in the clitellar region Bull. Br. Mas. not. Hist. (Zool.) 37 (1) : 7-15 Issued 29 November 1979
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