FIVE NEW SPECIES OF CRICONEMOIDES TAYLOR, 1936 (CRICONEMATIDAE: NEMATODA) FROM CANADA

Abstract

Five new species of Criconemoides Taylor, 1936 are described. Criconemoides bakeri n. sp. resembles C. annulatum Cobb, in Taylor, 1936, but differs in having a much smaller number of annules and the head region not set off by a constriction. Criconemoides petasus n. sp. resembles C. annulifer (de Man, 1921) Taylor, 1936, but differs in not having a basal cephalic annule, in the spear being shorter, and in the body annules being well separated by incurvations. Criconemoides hemisphaericaudatus n. sp., with males present, appears to resemble C. simile (Cobb, 1918) Chitwood, 1949. It differs in having a greater number of annules, the excretory pore more posterior in position, and the anterior vulvar lip simple. Criconemoides rotundicaudatus n. sp., with males present, also resembles C. annulatum. It differs in having the first two annules not set off by a constriction, and in having the first few annules usually packed together. The anterior vulvar lip is simple and inconspicuous. It differs from C. simile in having a longer spear, a larger number of annules, the excretory pore more posterior in position, and the anterior vulvar lip simple. Crionemoides quasidemani n. sp. is close to C. demani Taylor, 1936. It differs in having the excretory note more posterior in position, the second cephalic annule not thicker than the first annule, and the caudal half of the tail attenuated. It differs from C. princeps Andrássy, 1962 in having a greater number of annules, shorter spear, and more slender tail, and in the absence of cuticular patches on the lateral aspect.