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Bursaphelenchus niphades n. sp. (Tylenchina: Aphelenchoididae) amensally associated with Niphades variegatus ( ...

Bursaphelenchus niphades n. sp. (Tylenchina: Aphelenchoididae) amensally associated with Niphades... A Bursaphelenchus species was isolated from a Japanese nativewood-boring weevil, Niphades variegatus, and dead Pinaceaetrees. The nematode is associated with the weevils as dauer (dispersal thirdstage) juveniles and the dauers enter the weevil tracheal system forming anabnormal expansion on the weevil trachea (atrium). Thus, the nematode ishypothesised to be an amensal/phoretic associate of the weevil because theabnormal expansion appeared to inhibit weevil respiration. The propagativestages of the nematode are associated with dead trees (wood and bark materials)and are thought to feed there on naturally propagated fungi. Morphologically,the new species is considered an undescribed species close to B.antoniae, B. chengi and B.hylobianum. Within these four species, the new species, which isdescribed herein as B. niphades n. sp., is closest toB. chengi, i.e., the typological characterof these two species are almost identical to each other and is distinguished bysome minor characters (structure of the male P4 genital papillae and spiculelength). The molecular phylogenetic analysis supported the morphologicalobservations. Bursaphelenchus niphades n. sp. formed a wellsupported subclade with the four species and is intermediate between B.hylobianum and B. chengi; however, it isdistinguished by the molecular sequences of some ribosomal RNA genes. Becausethree of these four species are associated with weevil species, the subclade isconsidered a ‘weevil-associated’ species group. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematology Brill

Bursaphelenchus niphades n. sp. (Tylenchina: Aphelenchoididae) amensally associated with Niphades variegatus ( ...

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
Subject
Articles
ISSN
1388-5545
eISSN
1568-5411
DOI
10.1163/15685411-00002763
Publisher site
See Article on Publisher Site

Abstract

A Bursaphelenchus species was isolated from a Japanese nativewood-boring weevil, Niphades variegatus, and dead Pinaceaetrees. The nematode is associated with the weevils as dauer (dispersal thirdstage) juveniles and the dauers enter the weevil tracheal system forming anabnormal expansion on the weevil trachea (atrium). Thus, the nematode ishypothesised to be an amensal/phoretic associate of the weevil because theabnormal expansion appeared to inhibit weevil respiration. The propagativestages of the nematode are associated with dead trees (wood and bark materials)and are thought to feed there on naturally propagated fungi. Morphologically,the new species is considered an undescribed species close to B.antoniae, B. chengi and B.hylobianum. Within these four species, the new species, which isdescribed herein as B. niphades n. sp., is closest toB. chengi, i.e., the typological characterof these two species are almost identical to each other and is distinguished bysome minor characters (structure of the male P4 genital papillae and spiculelength). The molecular phylogenetic analysis supported the morphologicalobservations. Bursaphelenchus niphades n. sp. formed a wellsupported subclade with the four species and is intermediate between B.hylobianum and B. chengi; however, it isdistinguished by the molecular sequences of some ribosomal RNA genes. Becausethree of these four species are associated with weevil species, the subclade isconsidered a ‘weevil-associated’ species group.

Journal

Nematology – Brill

Published: Jun 9, 2014

Keywords: amensalism; DNA sequences; molecular; morphology; morphometrics; new species; phoresy; phylogeny; Pinaceae; taxonomy

References

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