Abstract
Trichodorus intermedius n. sp., Trichodorus dilatatus n. sp., and Paratrichodorus (Atlantadorus) grandis n. sp. are described from soil around native plants of Southern California. The females of the three subgenera of Paratrichodorus are further characterized on the basis of the vulva, which is pore-like in Atlantadorus, a longitudinal slit in Paratrichodorus, and a transverse slit in Nanidorus.
Keywords: Taxonomy, morphology, Trichodorus intermedius, Trichodorus dilatatus, Paratrichodorus (Atlantadorus) grandis, supplementary papillae
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