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Type: Article
Published: 2021-11-22
Page range: 151-165
Abstract views: 373
PDF downloaded: 239

First record of Bursaphelenchus hildegardae Braasch et al., 2006 (Nematoda) in New Zealand with updated information on morphology, sequencing and a key to species of the eggersi-group

Manaaki Whenua - Landcare Research, 231 Morrin Road, Auckland, New Zealand.
Plant Health & Environment Laboratory, Ministry for Primary Industries, 231 Morrin Road, Auckland, New Zealand.
Plant Health & Environment Laboratory, Ministry for Primary Industries, 231 Morrin Road, Auckland, New Zealand.
Biosecurity Surveillance & Incursion Investigation Plant Health, Ministry for Primary Industries, 14 Sir William Pickering Drive, Christchurch, New Zealand.
Biosecurity Surveillance & Incursion Investigation Plant Health, Ministry for Primary Industries, 14 Sir William Pickering Drive, Christchurch, New Zealand.
SPS Biota Ltd., PO Box 31589, Lower Hutt, New Zealand.
Plant Health & Environment Laboratory, Ministry for Primary Industries, 231 Morrin Road, Auckland, New Zealand.
Nematoda distribution molecular morphology morphometrics new record phylogeny taxonomy

Abstract

Bursaphelenchus hildegardae Braasch et al., 2006 was collected from pine wood (Pinus radiata) growing in Kaingaroa Timberlands, and a bark beetle, Hylastes ater Paykull, 1800 in New Zealand. This is a new record for B. hildegardae, occuring in New Zealand, and the second report from the southern hemisphere in addition to Australia. In general, the New Zealand isolate of B. hildegardae corresponds well with the description of B. hildegardae given by Braasch et al. (2006) from Germany. The New Zealand isolate is characterized by having an adult body length of 807–1190 μm, medium a ratios (47.5–58.5 for female and 44.6–60.1 for male), b ratios of 9.8–14.5 (female) and 10.2–12.7 (male), c ratios of 18.8–25.2 (female) and 21.6–32.4 (male), c’ ratios of 4.0–4.4 (female) and 2.1–2.7 (male), and is characterised by having three incisures in the lateral fields, thorn-shaped spicules with a distinctly dorsally-bent thin hook-like condylus, and a dorso-ventally visible terminal bursa. In addition, molecular phylogeny using near full length small subunit (SSU), D2/D3 expansion segments of the large subunit (LSU) and the internal transcribed spacer region (ITS1 and 2) of the ribosomal rDNA supports the identification. A key to Bursaphelenchus species in the eggersi-group is given.

 

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