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New Quaternary records of Conilurus (Rodentia: Muridae) from eastern and northern Australia with the description of a new species
No full textCramb, Jonathan, Hocknull, Scott (2010): New Quaternary records of Conilurus (Rodentia: Muridae) from eastern and northern Australia with the description of a new species. Zootaxa 2634 (1): 41-56, DOI: 10.11646/zootaxa.2634.1.3, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2634.1.
FIGURE 2 in New Quaternary records of Conilurus (Rodentia: Muridae) from eastern and northern Australia with the description of a new species
No full textFIGURE 2. Terminology of the upper molars. Only features mentioned in this work are included. This image is based on C. capricornensis, but includes features not seen in that species. Cusp names are topological and do not necessarily reflect homology.Published as part of Cramb, Jonathan & Hocknull, Scott, 2010, New Quaternary records of Conilurus (Rodentia: Muridae) from eastern and northern Australia with the description of a new species, pp. 41-56 in Zootaxa 2634 (1) on page 43, DOI: 10.11646/zootaxa.2634.1.3, http://zenodo.org/record/530381
FIGURE 3. A–F Conilurus albipes. A. QMF54064 right maxilla with heavily worn M1-3 in New Quaternary records of Conilurus (Rodentia: Muridae) from eastern and northern Australia with the description of a new species
No full textFIGURE 3. A–F Conilurus albipes. A. QMF54064 right maxilla with heavily worn M1-3; B. QMF54065 right maxilla with M1-3; C. QMF52052 left maxilla with M1-2; D–E QMF54066 left mandible with I and M; F. QMF54073 left M1; 1 1-3 G–H C. penicillatus. G. QMF54058 right M1; H. left M1; I–J tree rat, indet. sp. I. QMF54078 right M1; J. QMF54075 right maxilla with M1-2. Scale bars= 2mm.Published as part of Cramb, Jonathan & Hocknull, Scott, 2010, New Quaternary records of Conilurus (Rodentia: Muridae) from eastern and northern Australia with the description of a new species, pp. 41-56 in Zootaxa 2634 (1) on page 44, DOI: 10.11646/zootaxa.2634.1.3, http://zenodo.org/record/530381
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
Taxonomy and palaeoecology of Quaternary faunas from caves in eastern tropical Queensland : a record of broad-scale environmental change
No full textAnalysis of fossils from cave deposits at Mount Etna (eastern-central Queensland) has established that a species-rich rainforest palaeoenvironment existed in that area during the middle Pleistocene. This unexpected finding has implications for several fields (e.g., biogeography/phylogeography of rainforest-adapted taxa, and the impact of climate change on rainforest communities), but it was unknown whether the Mount Etna sites represented a small refugial patch of rainforest or was more widespread.\ud
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In this study numerous bone deposits in caves in north-east Queensland are analysed to reconstruct the environmental history of the area during the late Quaternary. Study sites are in the Chillagoe/Mitchell Palmer and Broken River/Christmas Creek areas. The cave fossil records in these study areas are compared with dated (middle Pleistocene-Holocene) cave sites in the Mount Etna area. Substantial taxonomic work on the Mount Etna faunas (particularly dasyurid marsupials and murine rodents) is also presented as a prerequisite for meaningful comparison with the study sites further north.\ud
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Middle Pleistocene sites at Mount Etna contain species indicative of a rainforest palaeoenvironment. Small mammal assemblages in the Mount Etna rainforest sites (>500-280 ka) are unexpectedly diverse and composed almost entirely of new species. Included in the rainforest assemblages are lineages with no extant representatives in rainforest (e.g., Leggadina), one genus previously known only from New Guinea (Abeomelomys), and forms that appear to bridge gaps between related but morphologically-divergent extant taxa ('B-rat' and 'Pseudomys C'). Curiously, some taxa (e.g., Melomys spp.) are notable for their absence from the Mount Etna rainforest sites. After 280 ka the rainforest faunas are replaced by species adapted to open, dry habitats. At that time the extinct ‘rainforest’ dasyurids and rodents are replaced by species that are either extant or recently extant. By the late Pleistocene all ‘rainforest’ and several ‘dry’ taxa are locally or completely extinct, and the small mammal fauna resembles that found in the area today. The faunal/environmental changes recorded in the Mount Etna sites were interpreted by previous workers as the result of shifts in climate during the Pleistocene.\ud
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Many samples from caves in the Chillagoe/Mitchell-Palmer and Broken River/Christmas Creek areas are held in the Queensland Museum’s collection. These, supplemented with additional samples collected in the field as well as samples supplied by other workers, were systematically and palaeoecologically analysed for the first time. Palaeoecological interpretation of the faunal assemblages in the sites suggests that they encompass a similar array of palaeoenvironments as the Mount Etna sites. ‘Rainforest’ sites at the Broken River are here interpreted as being of similar age to those at Mount Etna, suggesting the possibility of extensive rainforest coverage in eastern tropical Queensland during part of the Pleistocene.\ud
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Likewise, faunas suggesting open, dry palaeoenvironments are found at Chillagoe, the Broken River and Mount Etna, and may be of similar age. The 'dry' faunal assemblage at Mount Etna (Elephant hole Cave) dates to 205-170 ka. Dating of one of the Chillagoe sites (QML1067) produced a maximum age for the deposit of approximately 200 ka, and the site is interpreted as being close to that age, supporting the interpretation of roughly contemporaneous deposition at Mount Etna and Chillagoe. Finally, study sites interpreted as being of late Pleistocene-Holocene age show faunal similarities to sites of that age near Mount Etna.\ud
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This study has several important implications for the biogeography and phylogeography of murine rodents, and represents a major advance in the study of the Australian murine fossil record. Likewise the survey of the northern study areas is the first systematic analysis of multiple sites in those areas, and is thus a major contribution to knowledge of tropical Australian faunas during the Quaternary. This analysis suggests that climatic changes during the Pleistocene affected a large area of eastern tropical Queensland in similar ways. Further fieldwork and dating is required to properly analyse the geographical extent and timing of faunal change in eastern tropical Queensland
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
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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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