Abstract
The Afrotropical genus Diplotrichus Jordal, 2021 is revised. Altogether 21 species are included in the genus, with 10 species described as new to science: Diplotrichus pilifrons Jordal, sp. nov., Diplotrichus medius Jordal, sp. nov., and Diplotrichus calvifrons Jordal, sp. nov. from South Africa, and Diplotrichus acutior Jordal, sp. nov., Diplotrichus falcatus Jordal, sp. nov., Diplotrichus pulchellus Jordal, sp. nov., Diplotrichus granulatus Jordal, sp. nov., Diplotrichus tuberculatus Jordal, sp. nov., Diplotrichus robustus Jordal, sp. nov., and Diplotrichus plenus Jordal, sp. nov., all from Madagascar. A molecular phylogenetic analysis based on five gene fragments (COI, EF-1a, CAD, PABP1, 28S) resulted in four major clades, with South African species nested within a grade of Malagasy species, supporting a more recent colonisation of the African mainland around the early Miocene.
References
Ali, J.R. & Huber, M. (2010) Mammalian biodiversity on Madagascar controlled by ocean currents. Nature, 463, 653–656. https://doi.org/10.1038/nature08706
Beaver, R.A. (2011) New synonymy and taxonomic changes in bark and ambrosia beetles (Coleoptera: Curculionidae: Scolytinae, Platypodinae) Koleopterologische Rundschau, 81, 277–289.
Bukontaite, R., Ranarilalatiana, T., Randriamihaja, J.H. & Bergsten, J. (2015) In or out-of-Madagascar?—Colonization patterns for large-bodied diving beetles (Coleoptera: Dytiscidae). PLoS ONE, 10, e0120777. https://doi.org/10.1371/journal.pone.0120777
Johnson, A.J., Hulcr, J., Smith, S.M., Cognato, A.I., Knížek, M., Atkinson, T.H., Mandelshtam, M.Y., Park, S., You, L. & Jordal, B.H. (2020) Revision of the bark beetle genera within the former Cryphalini (Curculionidae: Scolytinae). Insect Systematics and Diversity, 4, 1–81. https://doi.org/10.1093/isd/ixaa002
Jordal, B.H. (2021a) Molecular and morphological revision of Afrotropical Hypoborini (Coleoptera: Curculionidae: Scolytinae) revealed novel bark beetle taxa with narrow geographical distributions. European Journal of Entomology, 118, 90–110. https://doi.org/10.14411/eje.2021.011
Jordal, B.H. (2021b) A phylogenetic and taxonomic assessment of Afrotropical Micracidini (Coleoptera, Scolytinae) reveals a strong diversifying role for Madagascar. Organisms Diversity & Evolution, 21, 245–278. https://doi.org/10.1007/s13127-021-00481-4
Samonds, K.E., Godfrey, L.R., Ali, J.R., Goodman, S.M., Vences, M., Sutherland, M.R., Irwin, M.T. & Krause, D.W. (2012) Spatial and temporal arrival patterns of Madagascar’s vertebrate fauna explained by distance, ocean currents, and ancestor type. Proceedings of the National Academy of Sciences, 109, 5352–5357. https://doi.org/10.1073/pnas.1113993109
Schedl, K.E. (1950) Fauna Madagascariensis, I. Institut Scientifique de Madagascar, Memoires, Series A, 4, 105–111.
Schedl, K.E. (1953) Fauna Madagascariensis, III. Institut Scientifique de Madagascar, Memoires, Series E, 8, 67–106.
Schedl, K.E. (1958) A few new African Scolytidae in the British Museum. Annals and Magazine of Natural History, 13, 557–560. https://doi.org/10.1080/00222935808650982
Schedl, K.E. (1961) Fauna Madagascariensis, IV. 188 contribution. Institut Scientifique de Madagascar, Memoires, Series E, 12, 127–170.
Schedl, K.E. (1962) On some African bark and timber beetles. West African Timber Borer Research Unit, Technical Bulletin, 5, 57–74.
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. (1965) Fauna Madagascariensis, VI. 232 Beitrag. Reichenbachia, Dresden, 5, 51–85.
Schedl, K.E. (1977) Die Scolytidae und Platypodidae Madagaskars und einiger naheliegender Inselgruppen. Mitteilungen der Forstlichen Bundes-Versuchsanstalt Wien, 119, 1–326.
Schedl, K.E. (1982) Scolytoidea (Coleoptera), mainly from South Africa. Annals of the Transvaal Museum, 33, 277–286.
Swofford, D. (2002) PAUP*. Phylogenetic Analysis Using Parsimony (*and other methods). Version 4. Sinauer Associates, Sunderland. [program]
Wood, S.L. & Bright, D.E. (1992) A catalog of Scolytidae and Platypodidae (Coleoptera). Part 2: Taxonomic index. Great Basin Naturalist Memoirs, 13, 1–1553.