THE GENERA BASIRIA-SIDDIQI, 1959, NEOPSILENCHUS THORNE AND MALEK, 1968 AND FILENCHUS ANDRASSY, 1954 (NEMATODA, TYLENCHIDAE) FROM CAMEROON, WITH A DESCRIPTION OF BASIRIA-PARATUMIDA N-SP

A new species of the genus Basiria Siddiqi, 1959 is described from the rhizosphere of peanut, Arachis hypogaea L. in Ndop, North West Provin ce, Cameroon. B. paratumida n. sp. is characterised by its well-develo ped, anteriorly-situated median bulb, dorsal oesophageal gland outlet about 2.5 pm posterior to stylet base, a V' value of 75-79%, a tail/V- A value of 0.6-0.7, and a tail distinctly striated along its entire le ngth with a rounded terminus. The new species resembles B. duplexa (Ha gemeyer & Allen, 1952) Geraert, 1968 and B. tumida (Colbran, 1960) Ger aert, 1968. From B. duplexa, it is distinguished by its shorter body, shorter oesophagus, and shorter, striated tail with a rounded terminus . It differs from B. tumida in its lower V' value, its greater vulva-a nus distance and its striated tail which also relates it to B. gramino phila Siddiqi, 1959 from which it is distinguished by its more anterio rly-situated median bulb and dorsal oesophageal gland outlet. Morphome tric data, descriptions, and illustrations of four known tylenchs, nam ely, Basiria graminophila; B. tumida; Neopsilenchus minor (Geraert, 19 68) Kheiri, 1972; and Filenchus aquilonius (Wu, 1969) Siddiqi, 1986, a ll recorded for the first time in Cameroon, are given as well as hosts and localities of occurrence.