Abstract

Summary A new rhabditid entomophilic nematode was isolated from adult Epuraea (Haptoncus) ocularis collected from brown to light brown sap on the trunk of Ulmus parvifolia in Kyoto, Japan. The typological characters of the species, anteriorly opened peloderan bursa with nine bursal rays with the first, fifth, and eighth pairs directed dorsally, very long and two-part spicule with broad tip, and elongate conical female tail, do not fit the current nominal rhabditid genera. While phylogenetic analyses based on the near-full-length small subunit (18S) ribosomal RNA sequence tentatively suggest that the species is the sister of Buetschlinema, the typological and biological characters of the new species clearly differ from that genus, and so a new species is described herein as Chylorhabditis epuraeae n. gen., n. sp.

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