Abstract
A new genus of xyleborine ambrosia beetle, Melanesicus Beaver & Petrov gen. n., with type species Xyleborus partitus Browne (1974) is described from the Melanesian region. The following new combinations are proposed: M. caledoniae (Beaver & Liu, 2016) comb. n., M. deformatus (Browne, 1974) comb. n., M. granulosus (Schedl, 1975) comb. n., all from Xyleborus Eichhoff, 1864. Melanesicus tishechkini Petrov sp. n. is described from Vanuatu, and Melanesicus nukuruanus sp. n. Beaver from Fiji. The taxonomy, distribution and biology of the species included are briefly reviewed.
References
Alonso-Zarazaga, M.A. & Lyal, C.H.C. (2009) A catalogue of family and genus group names in Scolytinae and Platypodinae with nomenclatural remarks (Coleoptera: Curculionidae). Zootaxa, 2258 (1), 1‒134.
https://doi.org/10.11646/zootaxa.2258.1.1
Beaver, R.A. (1991) New synonymy and taxonomic changes in Pacific Scolytidae (Coleoptera). Annalen des Naturhistorisches Museum, Wien, 92B, 87‒97.
Beaver, R.A. & Liu, L.-Y. (2016) Ambrosia beetles (Coleoptera: Curculionidae, Scolytinae, Xyleborini) of New Caledonia, with descriptions of four new species. Entomologist’s Monthly Magazine, 152, 21‒32.
Biedermann, P.H.W. & Taborsky, M. (2011) Larval helpers and age polyethism in ambrosia beetles. Proceedings of the National Academy of Sciences, 108, 17064‒17069.
https://doi.org/10.1073/pnas.1107758108
Biedermann, P.H.W. & Vega, F.E. (2020) Ecology and evolution of insect-fungus mutualisms . Annual Review of Entomology, 65, 431‒455.
https://doi.org/10.1146/annurev-ento-011019-024910
Biedermann, P.H.W., Klepzig, K.D. & Taborsky, M. (2011) Costs of delayed dispersal and alloparental care in the fungus-cultivating ambrosia beetle Xyleborus affinis (Scolytinae: Curculionidae). Behavioral Ecology and Sociobiology, 65, 1753‒1761.
https://doi.org/10.1007/s00265-011-1183-5Biedermann, P.H.W., Peer, K. & Taborsky, M. (2012) Female dispersal and reproduction in the ambrosia beetle Xyleborinus saxesenii Ratzeburg (Coleoptera; Scolytinae). Mitteilungen der Deutschen Gesellschaft für Allgemeine und Angewandte Entomologie, 18 (2011), 231‒236.
Browne, F.G. (1974) A summary of the scolytid fauna (Coleoptera) of Fiji, with some new species. Commonwealth Forestry Review, 53, 63‒71.
Cognato, A.I. (2018) Callibora Cognato (Coleoptera: Curculionidae: Scolytinae: Xyleborini), a new genus of xyleborine ambrosia beetle from Ecuador. The Coleopterists Bulletin, 72, 801‒804.
https://doi.org/10.1649/0010-065X-72.4.801
Cognato, A.I., Hulcr, J., Dole, S.A. & Jordal, B.H. (2011) Phylogeny of haplo-diploid fungus-growing ambrosia beetles (Curculionidae: Scolytinae: Xyleborini) inferred from molecular and morphological data. Zoologica Scripta, 40, 174‒186.
https://doi.org/10.1111/j.1463-6409.2010.00466.x
Cognato, A.I., Smith, S.M. & Beaver, R.A. (2020) Two new genera of Oriental xyleborine ambrosia beetles (Coleoptera, Curculionidae: Scolytinae). Zootaxa, 4722 (6), 540‒554.
https://doi.org/10.11646/zootaxa.4722.6.2
Eichhoff, W.J. (1864) Ueber die Mundtheile und die Fühlerbildung der europäischen Xylophagi sens. strict. Berliner Entomologische Zeitschrift, 8, 17‒46.
https://doi.org/10.1002/mmnd.18640080103
Hopkins, A.D. (1915) Classification of the Cryphalinae with descriptions of new genera and species. United States Department of Agriculture Report, 99, 1‒75, pls. I‒IV.
https://doi.org/10.5962/bhl.title.65905
Hulcr, J. & Cognato, A.I. (2009) Three new genera of oriental Xyleborina (Coleoptera: Curculionidae: Scolytinae). Zootaxa, 2204 (1), 19‒36.
https://doi.org/10.11646/zootaxa.2204.1.2
Hulcr, J. & Cognato, A.I. (2010) New genera of Palaeotropical Xyleborini (Coleoptera: Curculionidae: Scolytinae) based on congruence between morphological and molecular characters. Zootaxa, 2717 (1), 1‒33.
https://doi.org/10.11646/zootaxa.2717.1.1
Hulcr, J. & Cognato, A.I. (2013) Xyleborini of New Guinea, a taxonomic monograph (Coleoptera: Curculionidae: Scolytinae). Thomas Say Publications in Entomology, Entomological Society of America, Annapolis, Maryland, 172 pp.
Hulcr, J., Dole, S.A., Beaver, R.A. & Cognato, A.I. (2007) Cladistic review of generic taxonomic characters in Xyleborina (Coleoptera: Curculionidae: Scolytinae). Systematic Entomology, 32, 568‒584.
https://doi.org/10.1111/j.1365-3113.2007.00386.x
Kirkendall, L.R., Biedermann, P.H.W. & Jordal, B.H. (2015) Evolution and diversity of bark and ambrosia beetles. In: Vega, F.E. & Hofstetter, R.W. (Eds.), Bark Beetles. Biology and Ecology of Native and Invasive Species. Academic Press, London, pp. 85‒156.
https://doi.org/10.1016/B978-0-12-417156-5.00003-4Mandelshtam, M.Yu., Petrov, A.V., Smith S.M. & Cognato A.I. (2019) Resurrection of Heteroborips Reitter, 1913 (Coleoptera: Curculionidae: Scolytinae) from synonymy with Xyleborus Eichhoff, 1864. The Coleopterists Bulletin, 73, 387−394.
https://doi.org/10.1649/0010-065X-73.2.387Reitter, E. (1913) Bestimmungs-Tabelle der Borkenkäfer (Scolytidae) aus Europa und den angrenzenden Ländern. Wiener Entomologische Zeitung, 32 Beiheft, 1‒116.
https://doi.org/10.1002/mmnd.191419140104
Roberts, H. (1977) Observations on the biology of some tropical rain forest Scolytidae (Coleoptera) from Fiji. II. Subfamily Ipinae—tribe Xyleborini. Journal of Natural History, 11, 251‒272.
https://doi.org/10.1080/00222937700770181
Schedl, K.E. (1963) Scolytidae und Platypodidae Afrikas. Band II. Familie Scolytidae (Fortsetzung), Unterfamilie Ipinae (Fortsetzung). Revista de Entomologia de Moçambique, 5, 1‒594.
Schedl, K.E. (1975) New Scolytidae and Platypodidae from Papua and New Guinea IV. Annalen des Naturhistorisches Museum, Wien, 79, 337‒399.
Schedl, K.E. (1980) Zur Synonymie der Borkenkäfer. XXVIII. Zeitschrift der Arbeitsgemeinschaft Österreichischer Entomologen, 31 (1979), 117‒124.
Sittichaya, W. & Smith, S.M. (2020) Eggersanthus Sittichaya & Smith gen. nov., a new Oriental ambrosia beetle genus (Coleoptera: Curculionidae: Scolytinae: Xyleborini). Zootaxa, 4779 (2), 282‒288.
https://doi.org/10.11646/zootaxa.4779.2.9
Smith, S.M. (2017) Dinoxyleborus Smith, a new genus of Neotropical xyleborine ambrosia beetle (Coleoptera, Curculionidae: Scolytinae). Zootaxa, 4303 (1), 131−139.
http://doi.org/10.11646/zootaxa.4303.1.8
Smith, S.M., Beaver, R.A. & Cognato, A.I. (2020) A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China. ZooKeys, 983, 1‒442.
https://doi.org/10.3897/zookeys.983.52630
Wood, S.L. (1980) New genera and new generic synonymy in Scolytidae (Coleoptera). Great Basin Naturalist, 40, 89‒97.
https://doi.org/10.5962/bhl.part.20006Wood, S.L. (1986) A reclassification of the genera of the Scolytidae (Coleoptera). Great Basin Naturalist Memoirs, 10, 1‒126.