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South Brisbane, Australia

The little-known monotypic genus Notolaelaps is newly recorded from Australia. Males of Notolaelaps novaguinea Womersley are fully described for the first time, protonymphs are newly described, and females redescribed. A fourth species of Neolaelaps, Ne. windsori sp. nov., previously regarded as a form of Neolaelaps vitzthumi Domrow, is described as new. Male Neolaelaps vitzthumi are described for the first time from a heavily-infested specimen of Pteropus alecto. Both genera are re-diagnosed. Relationships between Notolaelaps, Neolaelaps and the Macronyssidae are discussed. Copyright © 2011. Source

Burrow C.J.,Queensland Museum
Canadian Journal of Earth Sciences | Year: 2011

Vertebrates preserved in calcareous concretions collected from Silurian marginal-marine deposits near Nerepis, southern New Brunswick include agnathan thelodonts, a heterostracan, and possibly an anaspid, as well as spines and scales from an acanthodian (the only jawed fish remains). Several incomplete specimens of acanthodians, all determined as the same taxon Nerepisacanthus denisoni nov. gen. et sp., are described based on material identified in several museum collections. The fish-bearing nodules are from the Silurian Cunningham Creek Formation, which has been dated from?late Llandovery (Telychian) - Ludlow (Ludlovian). The new species is only the second undisputed pre-Devonian acanthodian taxon known from articulated, although incomplete, specimens. N. denisoni has robust flank scales with a smooth crown bearing short subparallel ridges along the anterior edge, plus flatter scales with a crown formed of elongate, curved, areal-growth ridges, anterior to the pectoral region. The anterior dorsal fin spine is long, slightly curved and bears up to seven smooth longitudinal ridges of varying width on each side. The perichondrally ossified scapula is thin-walled and probably has a Ushaped cross section. "Dentition" cones and small denticles are preserved in the branchial or pharyngeal region. Although elements indisputably identifiable as dentigerous jaw bones were not found in the specimens, N. denisoni appears most closely related to the Early Devonian ischnacanthiform Acritolepis and is tentatively assigned to the family Acritolepidae Valiukevičius and Burrow. Source

Australian Polyrhachis species of the subgenera Myrma, Myrmatopa, Myrmothrinax and Polyrhachis are reviewed. A total of ten Australian species are recognised; four in the subgenus Myrma, three in Myrmatopa, two in Myrmothrinax and a single species in Polyrhachis. Polyrhachis inusitata Kohout and P. yarrabahensis are reinstated as valid species. Polyrhachis sericeopubescens Donisthorpe and P. lombokensis are considered extralimital and removed from the list of Australian species. Polyrhachis alphea Fr. Smith and Polyrhachis menozzii Karavaiev are reported from Australia for the first time. The extralimital species Polyrhachis dolomedes Fr. Smith is considered a senior synonym of Polyrhachis schang var. amboinae Santschi. The former subspecies, P. relucens var. breviorspinosa Donisthorpe is raised to specific status. A replacement name, Polyrhachis luteogaster, is proposed for the former subspecies and junior primary homonym P. alpheus var. rufiventris Emery. A lectotype of P. semitestacea Emery is designated. All species are illustrated and their known distributions and nesting habits summarised. Keys to the Australian species of the subgenera Myrma, Myrmatopa, Myrmothrinax are included. © Queensland Museum. Source

Two species of the fossil pachyrhizodontid teleost, Pachyrhizodus, are present in the marine Lower Cretaceous (mid to late Albian) Toolebuc and Allaru Formations of the Eromanga Basin in Queensland, Australia. New morphological data on P. marathonensis (Etheridge Jnr., 1905) is provided as part of a revision of the species. The smaller and much less common P. grawi sp. nov. is described and is shown to co-exist with P. marathonensis but has a more restricted distribution. Pachyrhizodus grawi is more gracile than the larger species, with a shorter premaxilla and with its jaw articulation positioned more anteriorly, below and just behind the back of the orbit. © Queensland Museum. Source

Cook A.G.,Queensland Museum
Episodes | Year: 2012

The stratigraphy, sedimentary history and paleontology of the northern Eromanga Basin are reviewed in the light of extensive field effort, searching for Cretaceous vertebrate fossils, in particular dinosaurs. Prolonged non-marine deposition throughout the Jurassic was followed by Lower Cretaceous marine incursions which extended to the late Albian. Whilst biostratigraphy is underpinned by microfloral assemblages there are three distinct marine faunas preserved from the late Aptian, early middle Albian and late Albian. Effective regression caused by sediment oversupply in the latest Albian heralded the final phase of non-marine deposition in the Eromanga Basin which continued into the Cenomanian. A distinct floral assemblage is accompanied by a modest fossil vertebrate assemblage. Source

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