MONONCHID NEMATODES FROM SPAIN - IOTONCHUS-PARAGEMINUS SP-N AND ITS RELATIONSHIPS WITH I-GEMINUS HEYNS AND LAGERWEY, 1965 AND I-RINAE COETZEE, 1967

Iotonchus parageminus sp. n. is described and illustrated with specime ns found in an uncultivated area in southern Spain. It is characterize d by having a medium size (1.72-2.43 mm), slender body (a = 35-53), li p region offset by a constriction, buccal cavity 18-27 x 27-40 mum, do rsal tooth with apex situated at 25-39 % from base of buccal cavity, V = 63-70 %, muscles between vas deferens and ductus ejaculatorius taki ng the form of outstretched circular band, male ventral body region no t contracted at beginning the supplement series, ejaculatory glands in tandem, spicules 53-67 mum, lateral guiding pieces with chelate-forke d extremity, 9-13 ventromedian supplements, tail conical with rounded terminus and spinneret opening subterminally. Univariate and principal component analyses based on female and male morphometric characters a re used to test the differences that explain the separation of I. para geminus sp. n. from most related species.