Abstract
As part of an ongoing inventory of the Australian fauna of Ptiliidae (Coleoptera, Staphylinoidea), several specimens were found in different berlesate samples from across the east coast of Queensland that did not conform to any of the genera currently known from Australia. The material proved to be two new species belonging to the genus Sindosium Johnson, 2007, Sindosium queenslandicum sp. n. and Sindosium lamingtoni sp. n. The species are described and compared to the other known species, a key to all known species is provided, and their distribution and biology are discussed.
References
Darby, M. (2019a) Studies of Ptiliidae (Coleoptera) in the Spirit Collection of the Natural History Museum, London 4: new records and species collected by M.E. Bacchus and others in Sabah (Borneo) in 1977. Entomologist´s Monthly Magazine, 155 (1), 43–58.
https://doi.org/10.31184/M00138908.1551.3964
Darby, M. (2019b) New Ptiliidae (Coleoptera) from Sarawak in the spirit collection of the Natural History Museum. London, European Journal of Taxonomy, 512, 1–50.
https://doi.org/10.5852/ejt.2019.512
Darby, M. (2020) A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species. European Journal of Taxonomy, 622, 1–188.
https://doi.org/10.5852/ejt.2020.622
Deane, C. (1930) Trichopterygidae of Australia and Tasmania. Desriptions of six new genera and eleven new species. Proceedings of the Linnean Society of New South Wales, 55 (4), 477–487.
Deane, C. (1931) Trichopterygidae of Australia and adjacent islands. Descriptions of five new genera and twenty new species. Proceedings of the Linnean Society of New South Wales, 56 (3), 227–242.
Deane, C. (1932) Trichopterygidae of Australia and adjacent islands. Descriptions of two new genera and eighteen new species. Proceedings of the Linnean Society of New South Wales, 57 (3–4), 181–196.
Deane, C. (1934) Small beetles. Victorian Naturalist, 50 (10), 242–244.
Grebennikov, V.V. (2008) How small you can go: factors limiting body miniaturization in winged insects with a review of the pantropical genus Discheramocephalus and description of six new species of the smallest beetles (Pterygota: Coleoptera: Ptiliidae). European Journal of Entomology, 105 (2), 313–328.
https://doi.org/10.14411/eje.2008.039
Johnson, C. (1971) Some Ptiliidae from the Philippine, Bismarck and Solomon islands (Insecta, Coleoptera). Steenstrupia, 2, 39–47.
Johnson, C. (1975) Arthropoda of the subantarctic islands of New Zealand. 8. Coleoptera: Ptiliidae. New Zealand Journal of Zoology, 2 (1), 9–14.
https://doi.org/10.1080/03014223.1975.9517858
Johnson, C. (1982) An introduction to the Ptiliidae (Coleoptera) of New Zealand. New Zealand Journal of Zoology, 9 (3), 333–376.
https://doi.org/10.1080/03014223.1982.10423865
Johnson, C. (2007) Studies on Ptiliidae (Col.) from the Solomon Islands, 1. Entomologists´Monthly Magazine, 143, 213–226.
Polilov, A.A. (2008) Anatomy of the smallest Coleoptera—feather-winged beetles of the tribe Nanosellini (Coleoptera, Ptiliidae) and limits of insect miniaturization. Entomological Review, 88 (1), 26–33.
https://doi.org/10.1134/S0013873808010041
Polilov, A.A. (2015) Small is beautiful: Features of the smallest insects and limits to miniaturization. Annual Review of Entomology, 60 (1), 103–121.
https://doi.org/10.1146/annurev-ento-010814-020924
Polilov, A.A., Ribera, I., Yavorskaya, M., Cardoso, A. & Grebennikov, V. & Beutel, R. (2019) The phylogeny of Ptiliidae (Coleoptera: Staphylinoidea)—the smallest beetles and their evolutionary transformations. Arthropod Systematics and Phylogeny, 77 (3), 433–455.
https://doi.org/10.26049/ASP77-3-2019-4
Rosauer, D.F., Catullo, R.A., VanDerWal, J., Moussalli, A. & Moritz, C. (2015) Lineage range estimation method reveals fine-scale endemism linked to Pleistocene stability in Australian rainforest herpetofauna. PLoS ONE, 10 (5), e0126274.
https://doi.org/10.1371/journal.pone.0126274
Sörensson, M. & Delgado, J.A. (2019) Unveiling the smallest—systematics, classification and a new subfamily of featherwing beetles based on larval morphology (Coleoptera : Ptiliidae). Invertebrate Systematics, 33 (5), 757–806.
https://doi.org/10.1071/IS19007