A DICHOTOMOUS KEY FOR THE IDENTIFICATION OF SPECIES OF XIPHINEMA (NEMATODA: DORYLAIMIDA) WITHIN THE X. AMERICANUM -- GROUP

摘要

A dichotomous key for the identification of species of the genus Xiphinema within the X. americanum-group is proposed. Thirty-eight species are attributed to the group. The key is based mainly on the length of the body and the odontostyle, on the value of ratios a, c, c' and V, and on the lip region shape and is complemented by tail shapes.