Description of Bursaphelenchus yongensis sp.n. (Nematoda: Parasitaphelenchidae) isolated from Pinus massoniana in China

摘要

Bursaphelenchus yongensis sp. n. isolated in Ningbo, China from Pinus massoniana, is described and illustrated. This nematode has a body length of 927 (816 - 102.3) mu m and 746 (699 - 926) mu m for females and males, respectively, a slim body (a = 42and 57, respectively), 13-14 um long stylet, excretory pore at level of median bulb, lateral field with three lines, long post-uterine branch extending two thirds to three quarters of vulva to anus distance and a conoid female tail (c = 30) usually showing a 2-5 um long mucron in central position at the terminus, male with small spicules (12-14 um long) having distinct pointed rostrum, high distinctly dorsally bent condylus and small cucullus, and a dorso-ventrally visible terminal bursa of variable shape, but often two-pointed. Bursaphelenchus yongensis sp. n. differs morphologically from the most similar В. eremus by the presence of a cucullus at the distal end of the spicules, the differently-formed spicule condylus being higher and more stronglydorsally bent than in В. eremus, the presence of a small vulval flap and the longer mucron of females. The new species can be differentiated from B. eremus and 26 other Bursaphelenchus species by means of ITS-RFLP.