Bursaphelenchus ogawanus n. sp. isolated from bark material of Fagus japonica Maxim. from Japan

A Bursaphelenchus species belonging to the abietinus group was isolated from a bark sample of Fagus japonica infested by an unidentified Dryocoetes bark beetle. The species is typologically characterised by its two-lined lateral field, mitten-shaped spicule possessing a well-developed and dorsally truncate condylus, narrow triangular rostrum and a distinct cucullus, the presence of seven (P1, P2, P3 papilliform and P5 gland-opening-like) male genital papillae, female vulva with side flap and the long, smoothly tapering and ventrally recurved female tail with strongly ventrally recurved distal part. The species is typologically close to B. irokophilus and B. rainulfi but can be distinguished from these two species by the shape of spicule rostrum, which is narrower in the new species. Phylogenetically, the new species forms a well-supported clade with B. rainulfi but can be distinguished from them by the differences in the SSU and D2-D3 LSU sequences. The new species is described as Bursaphelenchus ogawanus n. sp.