Bursaphelenchus clavicauda n. sp. (Nematoda: Parasitaphelenchidae) isolated from Cryphalus sp. emerged from a dead Castanopsis cuspidata (Thunb.) Schottky var. sieboldii (Makino) Nakai in Ishigaki Island, Okinawa, Japan

in Nematology
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Abstract

Bursaphelenchus clavicauda n. sp. is described and figured. The new species was isolated from Cryphalus sp., a species of bark beetle emerging from a dead log of Castanopsis cuspidata, and reared on Botrytis cinerea. Type specimens were collected from a 2- and 4-week-old culture on Botrytis cinerea. The new species has a body length of ca 665 μm (male) and 770 μm (female), medium (ca 30-50 for males and ca 30-45 for females) a values, b values of ca 9-13 (male) and 10-13 (female), c values of ca 20-28 (male) and 20-27 (female), c′ values of ca 2 (male) and ca 3-5 (female), ca 9-13 μm long stylet, three lines in the lateral field, relatively small (ca 14 μm) and strongly arcuate spicule with recurved and pointed condylus, seven (1 + 2 + 2 + 2) male caudal papillae and club-like female tail with rounded terminus and with or without various shapes of mucro. The new species is close to B. eremus, B. uncispicularis, B. yongensis and several other species possessing a large, recurved and pointed spicular condylus and is distinguished from these species mainly by male spicule, male caudal papillae and female tail morphologies, number of lateral lines and several morphometric values of females and males. Cultured nematodes were used for sequencing the partial (ca 1.6 kbps) small subunit, ITS regions and large subunit of ribosomal DNA for comparisons with those deposited at GenBank. The DNA sequences of the B. clavicauda n. sp. were close to those of B. eggersi, B. eremus, B. tusciae and B. yongensis.

Nematology

International Journal of Fundamental and Applied Nematological Research

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