Longidorus Elongatus and Closely Related Species in the Netherlands and Lower Saxony (Germany), With the Description of Two New Species, L. Cylindricaudatus and L. Intermedius (Nematoda: Dorylaimida)

Abstract

Odontostyle length, tail length, body width, and distance of spear guiding ring from anterior end of body are about 15% larger in populations of Longidorus elongatus without males in those with. Two new species, which are very similar to L. elongatus are described. They both differ from the latter species in having longer odontostyles (105-125 μm in L. intermedius n. sp. and 128-140 μm in L. cylindricaudatus n. sp.) and a more rounded anterior end. The body in the anal region is slightly thicker than more anteriorly in L. elongatus but not in L. intermedius and L cylindricaudatus. The anterior lateral pores lie posterior to the spear guiding ring in L. elongatus, slightly anterior to the spear guiding ring in L. intermedius and at two thirds of the distance from anterior end to spear guiding ring in L. cylindricaudatus.