DISCUSSION ON THE GENUS CALVATOMINA YOSII, 1966 (COLLEMBOLA, SYMPHYPLEONA) WITH DESCRIPTION OF A NEW SPECIES, CALVATOMINA-GUYANENSIS, FROM FRENCH-GUIANA

A new species of Calvatomina Yosii, 1966 is described from French Guia na: Calvatomina guyanensis sp.n. The description is mainly based on th e chaetotaxy of appendices and small abdomen with a particular attenti on to ontogeny. The genus Calvatomina is justified by the emphasis lai d on two characters: the parafurcal area shows four or five neosminthu roid setae, and several swollen setae present on the head in first ins tar get back to a slender shape from second instar (that fits with a r eversion). Calvatomina guyanensis is included in the group rufescens. Presence vs absence and morphology of the setae on the small abdomen a re used for distinguishing the species of this group.