Abstract
Paroster baylyi sp. n. and P. ursulae sp. n. are described from south-western Australia, and compared with the similar P. michaelseni Régimbart, 1908. Their median lobes, parameres, gonocoxae, gonocoxosterna and habitus are illustrated, and details about their unique habitats and water beetle coenoses are given. The two new species are the first dytiscids to be known breeding solely in temporarily water filled rock-holes—so-called “pan-gnammas”—in the Mallee zone of south-western Australia. The total number of described species in the genus Paroster Sharp, 1882 is now 11. Eight aquatic Coleoptera of the families Dytiscidae and Hydrophilidae are recorded from 13 pan-gnammas on four granite outcrops in south-western Australia.References
Bayly, I.A. (1982) Invertebrate fauna and ecology of temporary pools on granite outcrops in southern Western Australia. Australian Journal of Marine and Freshwater Research, 33, 599–606.
Bayly, I.A. (1992) The micro-Crustacea and physio-chemical feature of temporary ponds near Northcliffe, Western Australia. Journal of the Royal Society of Western Australia, 75 (4), 99–106.
Bayly, I.A. (1997) Invertebrates of temporary waters in gnammas on granite outcrops in Western Australia. Journal of the Royal Society of Western Australia, 80, 167–172.
Bayly, I.A. (1999) Rock of Ages. University of Western Australia Press, Nedlands, Tuart House, 1–132.
Fery, H. (2004) On the identity of Coelambus thapsinus Guignot, 1955 (Coleoptera: Dytiscidae). Entomologische Zeitschrift, 114 (4), 169–171.
Lansbury, I. (1995) Notes on the Corixidae and Notonectidae (Hemiptera: Heteroptera) of southern Australia. Records of the Western Australian Museum, 17, 181–189.
Lawrence, J.F., Weir, T.A. & Pyke, J.E. (1987) Haliplidae, Hygrobiidae, Noteridae, Dytiscidae and Gyrinidae, pp. 321–366. In: Lawrence, J. F., Moore, B. P., Pyke, J. E. & Weir, T. A. (eds) Zoological Catalogue of Australia, Volume 4, Coleoptera: Archostemata, Myxophaga and Adephaga. Bureau of Flora and Fauna. Canberra: Australian Government Publishing Service, viii + 444 pp.
Main, B.Y. (2000) Habitat template for invertebrates on granite outcrops. Journal of the Royal Society of Western Australia, 83, 139–137.
Michaelsen, W. & Hartmeyer, R. (1907) Reisebericht. In: Michaelsen, W. & Hartmeyer, R. (eds) Die Fauna Südwest-Australiens. Ergebnisse der Hamburger südwest-australischen Forschungsreise 1905, 1 (1), 1–116.
Miller, K.B. & Nilsson, A.N. (2003) Homology and terminology: Communicating information about rotated structures in water beetles. Latissimus, 17, 1–4.
Nilsson, A. (2001) Dytiscidae (Coleoptera). In: World Catalogue of Insects Volume 3. Stenstrup: Apollo Books, 395 pp.
Pederzani, F. (1995) Keys to the identification of the genera and subgenera of adult Dytiscidae (sensu lato) of the world (Coleoptera Dytiscidae). Atti dell'Accademia Roveretana degli Agiati, a. 244, ser. VII, vol. IV, B (1994), 5–83.
Pinder, A.M., Halse, S.A., Shiel, R.J. & McRae, J.M. (2000) Granite outcrop pools in south-western Australia: foci of diversification and refugia for aquatic invertebrates. Journal of the Royal Society of Western Australia, 83, 149–161.
Pinder, A.M., Halse, S.A., McRae, J.M. & Shiel, R.J. (2004) Aquatic invertebrate assemblages of wetlands and rivers in the wheatbelt region of Western Australia. Records of the Western Australian Museum Supplement No. 67, 7–37.
Porembski, S. & Barthlott, W. (eds.) (2002) Inselbergs: Biotic diversity of isolated rock outcrops in tropical and temperate regions. Berlin, Heidelberg: Springer, 524 pp.
Régimbart, M. (1908) Dytiscidae, Gyrinidae et Hydrophilidae. In: Michaelsen, W. & Hartmeyer, R. (eds): Die Fauna Südwest-Australiens. Ergebnisse der Hamburger südwest-australischen Forschungsreise 1905, 1 (8), 309–316.
Watts, C.H.S. (1978) A revision of the Australian Dytiscidae (Coleoptera). Australian Journal of Zoology, Supplementary Series, 57, 1–166.
Watts, C.H.S. (1985) A faunal assessment of Australian Hydradephaga. Proceedings of the Academy of Natural Sciences of Philadelphia, 137, 22–28.
Watts, C.H.S. (2002) Checklist and guides to the identification, to genus, of adults and larval Australian water beetles of the families Dytiscidae, Noteridae, Hygrobiidae, Haliplidae, Gyrinidae, Hydraenidae and the superfamily Hydrophiloidea (Insecta – Coleoptera). Cooperative Research Centre for Freshwater Ecology (Australia). Identification and Ecology Guide 43, 1–110.
Williams, W.D. & Allen, G.R. (1987) Origins and adaptations of the fauna of inland waters. In: Dyne, G.R. & Walton, D.W. (eds) Fauna of Australia. General Articles. Canberra: Australian Government Publishing Service Vol. 1 A., pp. 184–201.
Withers, P.C. (2000) Overview of granite outcrops in Western Australia. Journal of the Royal Society of Western Australia, 83, 103–108.