186,175 research outputs found
Data for: Relicts and radiations: Phylogenomics of an Australasian lizard clade with east Gondwanan origins (Gekkota: Diplodactyloidea)
No full textThis repository stores data associated with the published article 'Relicts and radiations: Phylogenomics of an Australasian lizard clade with east Gondwanan origins (Gekkota: Diplodactyloidea)', available at https://www.sciencedirect.com/science/article/pii/S1055790319302027?via%3Dihub#!. Included here are the cleaned in-target UCE fasta assemblies for the 290 gecko samples used in this study. For BAM files of cleaned assemblies and the raw reads, please contact the corresponding author. For phylogenies, specimen lists, and other data, please see original article
Gehyra serraticauda Skipwith & Oliver, 2014, sp. nov.
No full text<i>Gehyra serraticauda</i> sp. nov. <p>(Figs 1–3)</p> <p> <b>Holotype.</b> MCZ R7314, adult male, purchased from Antwerp Edgar Pratt and with collection locality recorded as Fakfak, Onin Peninsula (~2°55'"S, 132°18'E), West Papua Province, Indonesia. Date of original collection unknown, but lodged in the MCZ collection in 1909.</p> <p> <b>Additional material.</b> Uncollected specimen, from near Kamaka (formerly Warika) Village, 45 km SSE of Kaimana, Triton Bay, (03°46’14”S, 134°10’14”E), West Papua Province, Indonesia, 150–160 m a.s.l., collected, photographed and released by Dmitry Telnov, 10 September 2010.</p> <p> <b>Diagnosis.</b> <i>Gehyra serraticauda</i> is distinguished from other <i>Gehyra</i> species by the following suite of characters: moderately large size (91 mm SVL), prominent popliteal fold on the hindlimbs, high number of digital lamellae (finger IV = 16, toe IV = 17), distal lamellae deeply notched, rostral concave, supranasals small and widely separated by numerous small internasals, preanal pores arranged in a long single continuous chevron (36), and original tail strongly compressed dorsoventrally and adorned with a continuous series of acuminate scales on the lateral edges.</p> <p> <b>Comparisons.</b> A summary of comparative data for Melanesian <i>Gehyra</i> is given in Table 1. The combination of moderately large body size (> 90 mm) and distinctive acuminate lateral scales on the tail distinguish this species from all other <i>Gehyra</i>.</p> <p> <i>Gehyra serraticauda</i> <b>sp. nov.</b> specifically differs from <i>Gehyra mutilata</i>, <i>G. papuana</i> and the types of <i>G. lampei</i> and <i>G. interstitialis</i> in having very distinct lateral caudal serrations (<i>versus</i> minute or none), a much larger adult size (> 90 mm <i>versus</i> <70 mm), and a higher number of internasal scales (~10 <i>versus</i> <4). Based on the original description of <i>G. interstitialis</i> (actual types lost), <i>Gehyra serraticauda</i> <b>sp. nov.</b> further differs in having a notched rostral (<i>versus</i> quadrangular) and U-shaped mental (<i>versus</i> triangular). <i>Gehyra leopoldi</i> is a poorly known taxon that may be synonymous with <i>G. mutilata</i> (Bauer & Henle 1994); it is distinguished from <i>G. serraticauda</i> <b>sp. nov.</b></p> <p> by its much smaller size (44 mm), lower number of subdigital lamallae (always <9 <i>versus</i> usually>9 (exceptions being finger I and toe I)), and presence of only a single internasal in a dorsal concavity of the rostral.</p> <p> <i>Gehyra serraticauda</i> <b>sp. nov.</b> is similar in size to <i>G. baliola, G. barea</i> and <i>G. oceanica,</i> but again differs in having well developed tail serrations. It is further differentiated from <i>G. oceanica</i> by having deeply notched lamellae (<i>versus</i> shallowly notched and undivided), the presence of numerous small internasal scales (<i>versus</i> absent), enlarged subcaudals (<i>versus</i> small), and the presence of a prominent popliteal skinfold (<i>versus</i> absent). <i>Gehyra serraticauda</i> <b>sp. nov.</b> can be distinguished from a final large species of Papuan <i>Gehyra</i>, <i>G. membranacrularis</i> by its deeply notched subdigital lamellae (<i>versus</i> shallowly notched and undivided) and smaller and more numerous internasals (~10 <i>versus</i> 1–4).</p> <p> <i>Gehyra serraticauda</i> <b>sp. nov.</b> differs from <i>Gehyra marginata</i> Boulenger from the Maluku Islands of Indonesia (just west of New Guinea) in its smaller adult size (<130m <i>versus</i> > 130 mm), divided digital lamellae (<i>versus</i> undivided), lower number of lamellae (digit IV manus = 17 <i>versus</i> 20–25, digit IV pes = 17 <i>versus</i> 20–23), by the presence of many small internasals (<i>versus</i> a single large internasal), well developed popliteal skin folds only (<i>versus</i> well developed lateral skin folds on the trunk and both antecubital and popliteal skin folds), and having enlarged polygonal subcaudals (<i>versus</i> small and relatively uniform).</p> <p> Two other gekkonid genera occuring in the Pacific region may also have flattened tails with lateral serrations. The three species of <i>Perochirus</i> from Micronesia and Vanuatu have dorso-ventrally flattened tails with very distinct lateral spines; but differ from all <i>Gehyra</i> in the presence of a well developed claw and free phalanx on the inner toe (<i>versus</i> vestigal or absent), and further differ from <i>G. serraticauda</i> <b>sp. nov.</b> specifically in lacking popliteal folds and having much more widely spaced lateral spines (one per tail segment) (Zug 2013). <i>Hemidactylus</i> includes a number of species that have tail serrations and expanded digital pads, but can again be readily distinguished by the presence of a distinct claw on all digits (greatly reduced on the inner toe in <i>Gehyra serraticauda</i> <b>sp. nov.</b>), and are also generally somewhat smaller than <i>G.serraticauda</i> <b>sp. nov.</b></p> <p> <b>Description of holotype.–</b> Adult male with expressed postcloacal pores and large flap of loosely attached skin on the right side of the head (Figs. 1 a–b): SVL 91.0 mm; TrK 46.3 mm; HW 17.1 mm; HL 21.8 mm; HD 10.8 mm; EN 7.6; IORB 8.6 mm; POM 2.9 mm; FA 12.3 mm; CS 13.3 mm; EYE 5.8 mm; EAR 2.1 mm; TL(total) 83.0; TL(original) 65.0; IN 10; INT 5; SUPR 13; INFR 11; LAMF4 17; LAMT4 17.</p> <p>Head triangular, longer than wide (HW/HL=0.78) moderately large (HL/SVL = 0.24) and deep (HD/HL = 0.50); anterior left dentary fractured, posterior corner of jaw upturned. Rostrum long and robust (EN/HL = 0.35) with distinct dorsal concavity, transverse fold of skin extends across tip of rostrum. Rostral with deep dorsal notch, in contact with two supranasals and five small internasals along dorsal edge (Fig. 2 c). Supranasals separated by a high number of small internasals (n = 10) and up to five in transverse series. Nares contacting one supralabial, rostral, one large supranasal and one large postnasal; supralabials 11–12; infralabials 12. Mental U-shaped, bordered by oblong post-mentals. Pupil partially dilated, somewhat elliptical with smooth margins and limited crenulations (Fig. 2 d). Body long and robust (TrK /SVL = 0.40), thorax flexed prominently to the left. Skin on dorsum and venter smooth and composed entirely of small, flat, granular scales.</p> <p>Limbs relatively short and stout. Digits on both the fore and hind limbs with prominent and expanded pads (finger pads 1.1–1.6 times minimum width of finger, toe pads 1.2–1.5 minimum width of toe) (Fig. 2 a–b); penultimate phalanx free and well developed on all digits except finger I and toe I. The scansorial pad of digit I of both manus and pes is narrower relative to length than the other digits. Distal lamallae (excluding penultimate lamallae) deeply notched on fingers and toes, lamellar counts for all digits (total/deeply notched) as follows: fingers I = 11/4, II = 12/5, III = 16/6, IV = 17/7, V = 16/7; toes I = 14/6, II = 16/7, III = 17/8, IV = 17/8, V = 16/7. Basal webbing between digits limited, never reaches first phalangeal joint. Precloacal and femoral pores (n = 36) arranged in a single curved row terminating halfway along the femur (Fig. 2 f). Hemipenal bulge present but not pronounced, single row of three short cloacal spurs angled posteriorly on each bulge.</p> <p>Tail strongly compressed dorsoventrally, approximately 1.5 times wider than high, 83.0 mm in total length (65.0 mm original, 18.0 mm regenerated). Original portion partially autotomised 24.0 mm from the vent, with a distinct medial groove on the ventral surface, a single row of greatly enlarged pentagonal subcaudals extending its full length, and a continuous lateral fringe of densely packed acuminate scales extending from just posterior to the hindlimbs to the end of the original tail (Fig. 2 e). Scalation on the regenerated section of the tail is substantially smaller and more irregular and heterogeneous than that of the original, although the subcaudals are still relatively enlarged.</p> <p>In preservative, dorsum beige with irregular dark grey patches on the left shoulder, lateral regions of torso, pelvic area, and distal portion of the tail. Dorsal surface of the hands and feet beige like the dorsum of the body but with a slight reddish tinge, giving an overall darker appearance; lamellae of all digits beige becoming slightly darker distally. Colouration on the regenerated tail light reddish-grey.</p> <p> <b>Variation.</b> Photographs of the uncollected specimen from near Kamaka Village kindly provided to us by Dmitry Telnov (Fig. 3 a–c), specimen details above) show that it has a deeply divided rostral, prominent popliteal folds and acuminate scales on the lateral edges of the original tail. It is on the basis of these characters and its large size (field measured SVL ~ 120mm) that we assign this individual to the <i>G. serraticauda</i> <b>sp. nov.</b> When originally captured the colouration of this specimen was as follows; dorsum silvery grey with very extensive terracotta mottling and numerous indistinctly edged transverse bands along the dorsum; fore and hindlimbs predominently terracotta with no clear pattern but some silvery flecking; head with similar mottled colouration to the body and distinct silvery loreal and postorbital stripes; regrown tail silvery brown with no clear pattern; supralabials, infralabials and region of venter visible in photographs yellow; iris light olive green and pupil ellipitical with scalloped edges. In photos taken at a later time prior to release the dorsal colouration is greatly faded and mostly silvery grey with a brownish tinge towards the anterior regions and the only clear patterning being a small number of silvery spots and stripes on the head and neck.</p> <p> <b>Distribution and ecology.</b> Presuming the collection data for the holotype is accurate; this distribution of this species extends from Fakfak on the Onin Peninsula east as far as the Triton Bay region. Collection information for the holotype indicates that it was purchased from local people, and it thus seems likely that it is from a locality that is within walking distance of Fakfak. However, more fieldwork is required to confirm that this species occurs in this area.</p> <p> The Triton Bay specimen was collected in primary lowland rainforest on limestone in the environs of Kamaka Village. It was found during the day while hiding under bark on a dead standing tree. Like many <i>Gehyra</i> the strong dorsal patterning on this specimen varied over short periods of time (King & Horner 1989). Nothing is known about the collection locality and habitat of the holotype.</p> <p> <b>Eytmology.</b> The specific epithet is a feminine combination of the Latin adjective ‘serratus’ (notched like a saw) and the noun “cauda” (tail), and refers to the distinctive enlarged lateral scales on the tail of this species.</p> <p> <b>Remarks.</b> The taxonomic status and distribution of many Papuan <i>Gehyra</i> remains unclear (a situation exacerbated by low samples sizes for non-human commensal species and the loss and destruction of key types). New material and a proper phylogenetic analysis is required before <i>G. serraticauda</i> <b>sp. nov.</b> can be confidently placed in the phylogeny of <i>Gehyra</i>. However, it is superficially most similar to <i>G. baliola</i> and <i>G. b a re a</i> in overall size and proportions, the presence of a high number of scales between the nasals, and deeply notched lamellae. The distribution of this species also sits between the known range of <i>G. baliola</i> (southern New Guinea) and <i>G. barea</i> (probably widespread over islands just to the west of New Guinea), suggesting possible geographic turnover of ecologically similar and related taxa.</p> <p> <i>Gehyra</i>, for the most part, is a morphologically conserved taxon and the prominent lateral fringe of acuminate scales on the tail of <i>G. serraticauda</i> <b>sp. nov.</b> is quite unique (although <i>Gehyra mutilata</i> does have a similar, but much less prominent fringe). Many other gekkonids have flattened and or ornamented tails; ranging from prominent lappets (e.g., <i>Ptyhcozoon</i> sp.) to spiniform scales (e.g., <i>Kolekanos plumicaudus</i> and <i>Phelsuma serraticauda</i>). These structures may serve an array of functions, but are most frequently and most easily correlated with outline disruption and camouflage (Young <i>et al.</i> 2002; Heinicke <i>et al.</i> 2012).</p>Published as part of <i>Skipwith, Phillip L. & Oliver, Paul M., 2014, A new Gehyra (Gekkonidae: Reptilia) from New Guinea with unique caudal scalation, pp. 57-66 in Zootaxa 3827 (1)</i> on pages 58-63, DOI: 10.11646/zootaxa.3827.1.5, <a href="http://zenodo.org/record/286487">http://zenodo.org/record/286487</a>
Oedura bella Oliver & Jolly & Skipwith & Tedeschi & Gillespie 2020
No full text<i>Oedura bella</i> <p> <b>Northern Territory:</b> Type series. AMS R53437–8, 37 km north of MacArthur River base camp on Borroloola Road (16.10°S, 136.12°E); AMS R 53467, Caranbirini Water Hole, 21 km north of MacArthur River base camp (16.22°S, 136.15°E); AMS R 53643, Glyde River, 10 km east of MacArthur River base camp (16.43°S, 136.17°E); AMS R 53782, 37 km north of MacArthur River Camp (16.10°S, 136.12°E); NTM R 19310, Borroloola (16.07°S, 136.30°E); SAMA R 34188, McArthur River Station (16.67°S, 135.85°E); NTM R 37983, Mallapunyah Station (16.97°S, 135.80°E); NTM R 37389, Caranbirini Conservation Reserve (16.27°S, 136.08°E); NTM R 37395, Echo Gorge camp rocks (17.17°S, 137.71°E); NTM R 38035, China Wall Gorge, Nicholson River (17.85°S, 137.42°E); NTM R 21288, Musselbrook Reserve, turnoff to Murray Spring (18.61°S, 138.08°E); NTM R 37947, Mallapunyah Station (16.97°S, 135.80°E); NTM R 37383, Southern Lost City, Limmen National Park (15.63°S, 135.46°E). <b>Queensland:</b> QM J94016 (holotype), 10 km south of Mt Isa on Boulia Road, Queensland, Australia (20.8617°S, 139.4617°E); NTM R 21288, Musselbrook Reservoir (18.61°S, 138.08°E); SAMA R34208–9, SAMA R 35425, Lawn Hill NP (18.58°S, 138.50°E); QM J52748, Lawn Hill Station, Century Project Site (18.75°S, 138.58°E); QM J74927, Hells Gate (17.47°S, 138.37°E); QM J75207 –8, Lawn Hill (18.71°S, 138.48).</p>Published as part of <i>Oliver, Paul M., Jolly, Chris J., Skipwith, Phillip L., Tedeschi, Leonardo G. & Gillespie, Graeme R., 2020, A new velvet gecko (Oedura: Diplodactylidae) from Groote Eylandt, Northern Territory, pp. 438-450 in Zootaxa 4779 (3)</i> on page 449, DOI: 10.11646/zootaxa.4779.3.10, <a href="http://zenodo.org/record/3835377">http://zenodo.org/record/3835377</a>
Phylogeography, hotspots and conservation priorities: an example from the Top End of Australia
No full textAbstract not availableD.F. Rosauer, M.P.K. Blom, G. Bourke, S. Catalano, S. Donnellan, G. Gillespie, E. Mulder, P.M. Oliver, S. Potter, R.C. Pratt, D.L. Rabosky, P.L. Skipwith, C. Morit
Crossing the line: increasing body size in a trans-Wallacean lizard radiation (Cyrtodactylus, Gekkota)
No full textThe region between the Asian and Australian continental plates (Wallacea) demarcates the transition between two differentiated regional biotas. Despite this striking pattern, some terrestrial lineages have successfully traversed the marine barriers of Wallacea and subsequently diversified in newly colonized regions. The hypothesis that these dispersals between biogeographic realms are correlated with detectable shifts in evolutionary trajectory has however rarely been tested. Here, we analyse the evolution of body size in a widespread and exceptionally diverse group of gekkotan lizards (Cyrtodactylus), and show that a clade that has dispersed eastwards and radiated in the Australopapuan region appears to have significantly expanded its body size 'envelope' and repeatedly evolved gigantism. This pattern suggests that the biotic composition of the proto-Papuan Archipelago provided a permissive environment in which new colonists were released from evolutionary constraints operating to the west of Wallacea.Paul M. Oliver, Phillip Skipwith and Michael S.Y. Le
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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