• Catalogue and composition of fossil Anthicidae and Ischaliidae (Insecta: Coleoptera)

      Telnov, Dmitry; Bukejs, A (Paleontological Society., 2019-04)
      Despite the increasing rate of systematic research on extant tenebrionoid Coleoptera of the Anthicidae and Ischaliidae, their fossil records remained largely unrevised. In the current paper we review all hitherto named ant-like flower beetles and false fire-coloured beetles fossils. We suggest 16 fossil species can be reliably assigned to the Anthicidae and three species to the Ischaliidae. We proposed new placements for two fossil Anthicidae taxa: Petratypus nigri Kaddumi, 2005 moved from Anthicidae to Cucujiformia Familia incertae sedis and “Eurygenius” wickhami Cockerell, 1917 is re-described and moved from Eurygeniinae Anthicidae to Tenebrionoidea Familia and Genus incertae sedis. Additionally, three new species are described from Eocene Baltic amber, namely Nitorus succinius sp. nov., Steropes eleticinoides sp. nov. and Tomoderus saecularis sp. nov. An annotated catalogue of fossil Anthicidae and Ischaliidae is provided. We made a qualitative analysis of available data, evaluated the distribution of fossils in the light of current biogeography and geological time. The oldest hitherto known fossil record of the Anthicidae is 130.0-125.5 Ma (same for Macratriinae), of the Anthicinae - 37.2-33.9 Ma, of the Eurygeniinae - 55.8-48.6 Ma, of the Notoxinae, Steropinae and Tomoderinae - 37.2-33.9 Ma. The oldest hitherto know fossil record of the Ischaliidae is 37.2-33.9 Ma.
    • A new species of Miocene wombat (Marsupialia, Vombatiformes) from Riversleigh, Queensland, Australia, and implications for the evolutionary history of the Vombatidae

      Brewer, P; Archer, M; Hand, S; Price, GJ (Palaeontologia Electronica, 2018-08)
      A new species of wombat, Rhizophascolonus ngangaba sp. nov., is described from Miocene deposits at Riversleigh along with additional specimens of Rhizophascolonus crowcrofti, and some maxillary and mandibular fragments attributable to Rhizophascolonus. A phylogenetic analysis indicates that Rhizophascolonus is the next most plesiomorphic wombat after Nimbavombatus boodjamullensis. Morphological characters common to Nimbavombatus and Rhizophascolonus suggest that adaptations to high rates of tooth wear in wombats had their origin in the late Oligocene, presumably in response to climatic cooling and its effects on the vegetation. A period of climatic amelioration in the early Miocene may have led to diversification of wombats and/or to an expansion of their range into rainforest habitats. Although wombats form a significant component of Australia’s open-forest and woodland habitats from the early Pliocene to Holocene, they appear to have been rare in all palaeoenvironments prior to this.