1,721,035 research outputs found
Figure 11. Length versus posterior width for Lake Callabonna Diprotodon lower molar teeth. A, M1. B, M2. C, M3. D, M4 in Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia)
No full textFigure 11. Length versus posterior width for Lake Callabonna Diprotodon lower molar teeth. A, M1. B, M2. C, M3. D, M4.Published as part of Price, Gilbert J., 2008, Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia), pp. 369-397 in Zoological Journal of the Linnean Society 153 (2) on page 382, DOI: 10.1111/j.1096-3642.2008.00387.x, http://zenodo.org/record/544760
Figure 10. Length versus posterior width for Darling Downs Diprotodon lower molar teeth. A, M1. B, M2. C, M3. D, M4 in Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia)
No full textFigure 10. Length versus posterior width for Darling Downs Diprotodon lower molar teeth. A, M1. B, M2. C, M3. D, M4.Published as part of Price, Gilbert J., 2008, Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia), pp. 369-397 in Zoological Journal of the Linnean Society 153 (2) on page 379, DOI: 10.1111/j.1096-3642.2008.00387.x, http://zenodo.org/record/544760
Fossil Uromys (Rodentia: Murinae) from Central Queensland, with a Description of a New Middle Pleistocene Species
No full textCramb, Jonathan, Hocknull, Scott A., Price, Gilbert J. (2020): Fossil Uromys (Rodentia: Murinae) from Central Queensland, with a Description of a New Middle Pleistocene Species. Records of the Australian Museum (Rec. Aust. Mus.) 72 (5): 175-191, DOI: 10.3853/j.2201-4349.72.2020.1731, URL: http://dx.doi.org/10.3853/j.2201-4349.72.2020.173
Figure 4. Diprotodon P3 and M1. A–B, QMF6633 in Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia)
No full textFigure 4. Diprotodon P3 and M1. A–B, QMF6633, occlusal and lingual aspects of P3–M1 (Darling Downs). C–D, SAMP36367, occlusal and lingual aspects of P3–M1 (Strezlecki Creek). E–F, QMF11136, occlusal and lingual aspects of P3–M1 (mirrored; Darling Downs).Published as part of Price, Gilbert J., 2008, Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia), pp. 369-397 in Zoological Journal of the Linnean Society 153 (2) on page 374, DOI: 10.1111/j.1096-3642.2008.00387.x, http://zenodo.org/record/544760
Pleistocene palaeoecology of the eastern Darling Downs
No full textSeveral late Pleistocene fossil localities in the Kings Creek catchment, Darling Downs, southeastern Queensland, Australia, were examined in detail to establish an accurate, dated palaeoecological record for the region, and to test human versus climate change megafauna extinction hypotheses. Accelerator Mass Spectrometry (AMS 14C) and U/Th dating confirm that the deposits are late Pleistocene in age, but the dates obtained from the two methods are not in agreement. Fluvial depositional accumulation processes in the catchment reflect both high-energy channel and low-energy episodic overbank deposition. The most striking taphonomic observations for vertebrates in the deposits include: 1) low representation of post-cranial elements; 2) high degree of bone breakage; 3) variable abrasion but most identifiable bone elements with low to moderate degree of abrasion; 4) low rates of bone weathering; 5) low degree of carnivore bone modification; and 6) low degree of articulated or associated specimens. Collectively, those data suggest that the material was transported into the deposit from the surrounding proximal floodplain and that the assemblages reflect hydraulic sorting. A multifaceted palaeoecological investigation revealed significant habitat change between superposed assemblages of site QML796. The basal fossiliferous unit contained species that indicate the presence of a mosaic of habitats including riparian vegetation, vine thickets, scrubland, open and closed woodlands, and open grasslands during the late Pleistocene. Those woody and scrubby habitats contracted over the period of deposition so that by the time of deposition of the youngest horizon, the creek sampled a more open type environment. Sequential faunal horizons show a step-wise decrease in taxonomic diversity that cannot be explained by sampling or taphonomic bias. The decreasing diversity includes loss of some, but not all, megafauna and is consistent with a progressive local loss of megafauna in the catchment over an extended interval of time. Collectively, those data are consistent with a climatic cause of megafauna extinction, and no specific evidence was found to support human involvement in the local extinctions. Better dating of the deposits is critically important, as a secure chronology would have significant implications regarding the continent-wide extinction of the Australian megafauna
Diprotodon Owen 1838
No full textMYALL CREEK DIPROTODON As there were no dentaries sufficiently preserved to allow definitive distinction of large- and small-form individuals, it is not possible to separate isolated teeth into form class. However, the means of Myall Creek Diprotodon cheek teeth are similar to the undifferentiated size class samples from the Darling Downs and Lake Callabonna (Tables 2, 3). Additionally, the morphometric range of tooth sizes encompasses that of both large- and small-form individuals of body size differentiated assemblages (e.g. Darling Downs and Lake Callabonna; Figs 14, 15). Thus, those observations are in agreement with those of Marcus (1976), and suggest that both Diprotodon size classes are represented in the Myall Creek assemblage. Additionally, there are no consistent morphologies sufficient to warrant distinction of more than one morphospecies in the assemblage. Therefore, the data suggest that a single, sexually dimorphic Diprotodon species is present in the Myall Creek assemblage. Coefficient of variation values of the Myall Creek Diprotodon assemblage, and extant grey kangaroos, are lower than that for the Darling Downs and Lake Callabonna Diprotodon assemblages (Tables 2–4). Thus, the data may suggest that the temporal sampling range of the Myall Creek assemblage was less than that for the Darling Downs and Lake Callabonna.Published as part of Price, Gilbert J., 2008, Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia), pp. 369-397 in Zoological Journal of the Linnean Society 153 (2) on pages 386-387, DOI: 10.1111/j.1096-3642.2008.00387.x, http://zenodo.org/record/544760
Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
No full textPrice, Gilbert J., Cramb, Jonathan, Louys, Julien, Travouillon, Kenny J., Pease, Eleanor M. A., Feng, Yue-Xing, Zhao, Jian-Xin, Irvin, Douglas (2020): Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia. Records of the Australian Museum 72 (5): 193-206, DOI: 10.3853/j.2201-4349.72.2020.1723, URL: http://dx.doi.org/10.3853/j.2201-4349.72.2020.172
Phascolarctos stirtoni Bartholomai 1968
No full textPhascolarctos stirtoni Bartholomai, 1968 Holotype. QMF5707, right maxillary fragment with P 3, M 1–2, Cement Mills, Gore, southeastern Queensland (Late Pleistocene; Price et al., 2009). Diagnosis. See Bartholomai (1968).Published as part of Price, Gilbert J., Zhao, Jian-xin, Feng, Yue-xing & Hocknull, Scott A., 2009, New Records of Plio-Pleistocene Koalas from Australia: Palaeoecological and Taxonomic Implications, pp. 39-48 in Records of the Australian Museum 61 (1) on page 44, DOI: 10.3853/j.0067-1975.61.2009.1518, http://zenodo.org/record/529788
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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