XIPHINEAIA CMBERSI AND XIPHINEM NATURALE SP.N., TWO MONODELPHICLONGIDORIDS (NEMATODA, DORYLAIMIDA) FROM FLORIDA

Summary. Measurements and illustrations of populations of Xzphznema chambersi Thorne, 1939 from Florida are provided. X. naturale sp.n., also from Florida, is described, Both species are characterized by isoelectrofocusing of superoxide dismutase isoforms profile and by genomic DNA PCR amplification with the ITS primers and digestion of the amplification products with restriction enzymes. X. chnmbersz' and X. ~zaturale sp.n. are medium size (2 to 3 mm) monodelphic species with anterior 'crulva (V=23-25 %) and elongate, conica1 tail