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32 results for “Ctenotus”
Linked collectors and determiners for: Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone.
Natural history specimen data linked to collectors and determiners held within, "Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/958ff34b-f5e0-4e8f-903f-2b4473bb69b3">https://bionomia.net/dataset/958ff34b-f5e0-4e8f-903f-2b4473bb69b3</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/958ff34b-f5e0-4e8f-903f-2b4473bb69b3">https://gbif.org/dataset/958ff34b-f5e0-4e8f-903f-2b4473bb69b3</a>. Formatted as a Frictionless Data package.
Data from: Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
The scincid lizard genus Ctenotus is one of the most species-rich genera of squamate reptiles, but few molecular phylogenetic studies have been undertaken on the group. Here we assess molecular and morphological variation within C. piankai and C. duricola, an arid-adapted pair of nominate species characterized by a pattern of thin pale longitudinal lines on a dark background that occur primarily in the western deserts and Pilbara region of Australia. We sequenced mitochondrial DNA and genome-wide restriction-site associated DNA (RAD) from geographically widespread samples of these lizard taxa, with particularly dense sampling from the Pilbara region. Phylogenetic analyses of the mitochondrial cytochrome B gene and approximately 5,000 nuclear loci identified four highly divergent lineages within the two taxa. The four genetically-defined populations were concordant with geography and are distinguishable based on multiple morphological and color pattern characters, despite appearing superficially similar in appearance. Despite limited mtDNA exchange between two lineages in the Pilbara, we found no evidence for ongoing gene flow across the nuclear genome. For the western desert lineages, there was no evidence of introgression for either mtDNA or nDNA in our data. To resolve the taxonomy of the group, we redescribe C. piankai and C. duricola, and recognize the two divergent lineages as new species: C. rhabdotus sp. nov., from the south-eastern Kimberley, Ord, Victoria River and northern Tanami Desert regions of Western Australia and the Northern Territory, and C. pallasotus sp. nov., from the western Pilbara and North West Cape regions of Western Australia.
Data from: Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
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FIGURE 7 in Molecular phylogeny and morphological revision of the Ctenotus labillardieri (Reptilia: Squamata: Scincidae) species group and a new species of immediate conservation concern in the southwestern Australian biodiversity hotspot
FIGURE 7. Photograph in life of Ctenotus ora sp. nov. from Pinjarra, Western Australia (WAM R119059).
FIGURE 5 in Molecular phylogeny and morphological revision of the Ctenotus labillardieri (Reptilia: Squamata: Scincidae) species group and a new species of immediate conservation concern in the southwestern Australian biodiversity hotspot
FIGURE 5. Back patterns in the Ctenotus labillardieri species group. A–D illustrate geographic variation in C. labillardieri and E–J show representative back patterns in the other species in the group. The variation shown within C. labillardieri is not confined to the clades illustrated. A) C. labillardieri (R135665; lineage 6), B) C. labillardieri (R117354, lineage 1), C) C. labillardieri (R142908, lineage 2), D) C. labillardieri (166085, lineage 7), E) C. catenifer (R163143), F) C. delli (R13444), G) C. gemmula (R150245), H) C. lancelini (R18874), I) C. youngsoni (R66208), J) C. ora sp. nov. (R131983). Scale bars are all 1cm.
FIGURE 4 in Molecular phylogeny and morphological revision of the Ctenotus labillardieri (Reptilia: Squamata: Scincidae) species group and a new species of immediate conservation concern in the southwestern Australian biodiversity hotspot
FIGURE 4. Summary of results for the principal component analyses (PCAs) of the morphological data. Mean principal component scores and standard deviations are shown with sample sizes noted.
FIGURE 3 in Molecular phylogeny and morphological revision of the Ctenotus labillardieri (Reptilia: Squamata: Scincidae) species group and a new species of immediate conservation concern in the southwestern Australian biodiversity hotspot
FIGURE 3. Phylogram based on analysis of the combined data set. Values on selected branches refer to parsimony bootstrap values above the branch and Bayesian posterior probabilities below.
FIGURE 1 in Molecular phylogeny and morphological revision of the Ctenotus labillardieri (Reptilia: Squamata: Scincidae) species group and a new species of immediate conservation concern in the southwestern Australian biodiversity hotspot
FIGURE 1. Distribution of the seven major C. labillardieri (circle) clades, the C. lancelini (pentagonal) clade and the new taxon, C. ora sp. nov (square). Specimens used in both the genetic and morphological analyses are denoted with a white center, and specimens for which we only had morphological data are solid. The few specimens of C. labillardieri for which we only had tissue samples are denoted with an inner white ring. SCP refers to the Swan Coastal Plain west of the Darling Scarp. Black dotted lines represent boundaries between rainfall zones, as defined by Hopper (1979). Grey dotted line demarks the known range for C. ora sp. nov.
FIGURE 2 in Molecular phylogeny and morphological revision of the Ctenotus labillardieri (Reptilia: Squamata: Scincidae) species group and a new species of immediate conservation concern in the southwestern Australian biodiversity hotspot
FIGURE 2. Individual gene trees for the two genes used in this study. A) Representative parsimony phylogram for the ND2 data set. B) Representative phylogram from the nDNA data set. Values on selected branches refer to parsimony bootstrap values above the branch and Bayesian posterior probabilities below.
FIGURE 12 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 12. Pairwise RAD distances between reference individuals ('E' and 'W', Fig. 11) and all other individuals along a longitudinal transect through the Pilbara region. Individuals are color coded by their ultimate taxonomic designation (C. duricola, red circles; C. piankai, blue squares; C. pallasotus sp. nov., yellow triangles). (A) Pairwise distances between all individuals and the easternmost C. duricola individual (individual 'E', Fig. 11). Gene flow between C. pallasotus sp. nov. and C. duricola is expected to reduce genetic distances between these forms in the vicinity of the contact zone (approximate longitude = 119°E). Within-clade distances (after Fig. 10) are consistently lower than between-clade distances, but there is no evidence for clinal variation in genetic distances that would be suggestive of recent or ongoing nuclear gene flow. (B) Pairwise distances between all individuals and the westernmost C. pallasotus sp. nov. individual (individual 'W', Fig. 11).
FIGURE 7 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 7. Variation in Ctenotus duricola senso stricto (all specimens from WAM). Scale bar is 10 mm.
FIGURE 11 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 11. Geographic distribution of major genetic lineages in C. duricola senso lato as identified through genome-wide RAD sequencing (Fig. 10). Lineages are colored by their ultimate taxonomic designation (red circles: C. duricola; yellow triangles, C. pallasotus sp. nov.). Three points labeled with arrows are individuals with mismatches between mtDNA and RAD genotypes. Given the concordance between RAD genotypes, geography, and morphology, these conflicts suggest the presence of mitochondrial introgression between these taxa. Individuals labeled 'E' and 'W' are the easternmost and westernmost individuals from C. duricola s.l. as traditionally defined and were used as reference genomes for the clinal analysis shown in Fig. 12.
FIGURE 6 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 6. Variation in Ctenotus rhabdotus sp. nov. (paratypes) (all specimens from WAM). Scale bar is 10 mm.
FIGURE 1 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 1. Photographs in life of Ctenotus piankai senso lato individuals. A) Yamarna, WA (photo: M. Peterson); B) Birksgate Range, SA (SAMA R45385; photo: M. Hutchinson); C) Mornington Station, WA (photo: S.L. Macdonald); D) Tanami Desert, WA (photo: G. Harold).
FIGURE 2 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 2. Photographs in life of Ctenotus duricola senso lato individuals. A) eastern form (clean morphology)—Skull Springs, eastern Pilbara, WA (WAM R175335; photo: R.J. Ellis); B) eastern form—Gillam Siding, Abydos, WA (photo: B. Maryan); C) western form (spotted morphology)—Juna Downs, Hamersley Range, WA (photo: B. Maryan); D) western form—near Pannawonica, Hamersley Range, WA (photo: G. Harold).
FIGURE 4 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 4. (A) Geographic distribution of morphological forms within the nominate species 'C. piankai' (blue triangles, gray circles) and 'C. duricola' (red circles, yellow triangles). Relative to C. piankai from the interior deserts (blue triangles), northern populations from the Kimberley, Ord, Victoria River and northern Tanami desert (gray circles) are characterized by darker ground coloration, more midbody scale rows, and dorsal stripes that extend anteriorly onto the parietal scales (Figs. 1, 3). (B) Distribution of 'clean' (red circles) and 'spotted' (yellow triangles) morphological forms within 'C. duricola' in the Pilbara region of Western Australia. The 'clean' morphology (Figs. 2A, B; Fig. 3C) is largely restricted to the eastern Pilbara, although several individuals from the westernmost edge of the range of C. duricola (North West Cape and Barrow Island) were observed to have this morphology. Several geographic features of north-western Australia discussed in the text are labeled in Fig. 4B: NWC, North West Cape peninsula; D, De Grey River; F: Fortescue River Basin, AR, Ashburton River.
FIGURE 3 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 3. Lateral-dorsal perspective of the forebodies of Ctenotus. From top to bottom: A) C. piankai (WAM R108934), B) C. rhabdotus sp. nov. (WAM R110581), C) C. duricola (WAM R111876), and D) C. pallasotus sp. nov. (WAM R119931). Scale bar is 10 mm.
FIGURE 10 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 10. (A) Maximum likelihood (ML) phylogeny of genome-wide RAD sequence data from C. duricola, C. piankai, C. rhabdotus sp. nov., and C. pallasotus sp. nov. Clades are labeled by their ultimate taxonomic designation. Black circles on individual nodes denote strong bootstrap support (bootstrap proportion> 0.99). Three individuals labeled with "+++" carry a discordant mtDNA genome and suggest limited introgression between C. pallasotus sp. nov. and C. duricola. Individual WAMR110668 (C. pallasotus) is from the North West Cape is phenotypically more similar to C. duricola from the eastern Pilbara (see "NWC", Fig. 4B). (B) Principal coordinates analysis (PCoA) of RAD genotypes for 30 individuals from all four major clades; symbols correspond to individuals in the phylogeny shown in (A). (C) Secondary PCoA on reduced set of 28 individuals after removing the highly divergent C. rhabdotus sp. nov. sequences.
FIGURE 8 in Lizards in pinstripes: morphological and genomic evidence for two new species of scincid lizards within Ctenotus piankai Storr and C. duricola Storr (Reptilia: Scincidae) in the Australian arid zone
FIGURE 8. Variation in Ctenotus pallasotus sp. nov. (paratypes) (all specimens from WAM). Scale bar is 10 mm.
Figure 6 in Subspecies at crossroads: the evolutionary significance of genomic and phenotypic variation in a wide-ranging Australian lizard (Ctenotus pantherinus)
Figure 6. Genotypic clustering and admixture in Ctenotus pantherinus. Bars depict the relative proportion of alleles in each individual corresponding to the inferred genotypic clusters (i.e. ancestry proportions of individuals). Pie charts on the map indicate the average ancestry proportions corresponding to each cluster at each site (based on all individuals at that site). The clusters closely match the sample composition and geographical distribution of major clades from the nuclear phylogenetic analysis (Fig. 5). Multicoloured pies indicate admixture among clusters.
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