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50 results for “Australian monsoon”
Figure 3 in Taxonomic revision of dragon lizards in the genus Diporiphora (Reptilia: Agamidae) from the Australian monsoonal tropics
Figure 3. Distributions of D. australis and D. jugularis based on specimens examined and collection records.
Figure 2. Images from micro X in Taxonomic revision of dragon lizards in the genus Diporiphora (Reptilia: Agamidae) from the Australian monsoonal tropics
Figure 2. Images from micro X-ray computed tomography scans showing the differences in pleurodont (canine) tooth number in the upper jaw: a, arrangement in D. bennettii species group; b, other species groups included in the current study.
Linked collectors and determiners for: Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species.
Natural history specimen data linked to collectors and determiners held within, "Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/5f73d28a-b9b5-4297-91c5-e14ce6f4db0b">https://bionomia.net/dataset/5f73d28a-b9b5-4297-91c5-e14ce6f4db0b</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/5f73d28a-b9b5-4297-91c5-e14ce6f4db0b">https://gbif.org/dataset/5f73d28a-b9b5-4297-91c5-e14ce6f4db0b</a>. Formatted as a Frictionless Data package.
Data from: A revision of the bioregionalisation of freshwater fish communities in the Australian Monsoonal Tropics
The Australian freshwater fish fauna is very unique, but poorly understood. In the Australian Monsoonal Tropics (AMT) biome of northern Australia, the number of described and candidate species has nearly doubled since the last attempt to analyse freshwater fish species composition patterns and determine a bioregionalisation scheme. Here, we utilise the most complete database of catchment‐scale freshwater fish distributions from the AMT to date to: (a) reanalyze spatial patterns of species richness, endemism and turnover of freshwater fishes; (b) propose a biogeographic regionalisation based on species turnover; (c) assess the relationship between species turnover and patterns of environmental change and historic drainage connectivity; and (d) identify sampling gaps. Biogeographic provinces were identified using an agglomerative cluster analysis of a Simpson's beta (βsim) dissimilarity matrix. A generalised dissimilarity model incorporating eighteen environmental variables was used to investigate the environmental correlates of species turnover. Observed and estimated species richness and endemism were calculated and inventory completeness was estimated based on the ratio of observed to estimated species richness. Three major freshwater fish biogeographic provinces and 14 subprovinces are proposed. These differ substantially from the current bioregionalisation scheme. Species turnover was most strongly influenced by environmental variables that are interpreted to reflect changes in terrain (catchment relief and confinement), geology and climate (runoff perenniality, stream density), and biotic responses to climate (net primary productivity). Past connectivity between rivers during low sea‐level events is also influential highlighting the importance of historical processes in explaining contemporary patterns of biodiversity in the AMT. The inclusion of 49 newly discovered species and candidate species only reinforced known focal points of species richness and endemism in the AMT. However, a number of key sampling gaps remain that need to be filled to fully characterise the proposed bioregionalisation.
Distribution. Extensive, but sparse and discontinuous, distribution in monsoonal N Australian mainland, extending S to the Pilbara region; present also on Thevenard I, oft NW Western Australia. Translocated to nearby Serrurier I. in Muridae
Distribution. Extensive, but sparse and discontinuous, distribution in monsoonal N Australian mainland, extending S to the Pilbara region; present also on Thevenard I, oft NW Western Australia. Translocated to nearby Serrurier I.
FIGURE 14 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 14. Comparison of the subdigital lamellae of G. nana (no additional granules), G. granulum sp. nov. (1 to 3 small granules dividing proximal lamellae, shown in red) and G. spheniscus (small wedge of granules that extends towards tip of digit) (drawing—L. Tedeschi).
FIGURE 1 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 1. Distribution maps of species in the Gehyra nana group. A) Distribution of previously-described species and G. nana as redefined here. The distribution of the G. nana complex is represented in light green and based on over 100 genotyped specimens. For other species, symbols represent genotyped specimens. B) Distribution of the four new species described herein. Dots represent genotyped specimens.
FIGURE 10 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 10. Holotype of Gehyra pseudopunctata sp. nov. (WAM R164776) from Mt Nyulasy, WA, in dorsal, ventral and lateral views (scale bar = 10 mm).
FIGURE 2 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 2. Species tree (from Moritz et al. 2018), obtained using StartBEAST2 of members of the Gehyra nana group. Numbers on the nodes indicate posterior probabilities. Photo credits: P. Doughty, S. Wilson, R.J. Ellis, S. Mahony, H. Cook, B. Maryan, L. Tedeschi.
FIGURE 15 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 15. Holotype of Gehyra pluraporosa sp. nov. (WAM R174024) from King Edward River west, WA, in dorsal, ventral and lateral views (scale bar = 10 mm).
FIGURE 4 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 4. Visualisation of outcomes of linear discriminant analysis on morphological traits of Gehyra nana group specimens across: upper plot) the four phylogenetically divergent lineages we describe here and the G. nana complex (confidence ellipse removed); lower plot) lineages within the G. nana species complex (for nana8 we removed the confidence ellipse due to the small sample sizes for this lineage; n = 5).Vectors indicate the relative contributions of strongly loading traits for the first 2 LDA axes.
FIGURE 8 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 8. Holotype of Gehyra paranana sp. nov. (NTM R37057) from Robin Falls area, NT (scale bar = 10 mm).
FIGURE 3 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 3. Upper) Phylogenetic tree for all samples of the Gehyra nana group subject to exon capture, obtained by RAxML on a concatenated dataset (from Moritz et al. 2018). Lower) Matrix summarising the geographic range and the pairwise geographic relations across all lineages and species within the G. nana group.
FIGURE 5 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 5. Photos in life of the species described herein. A) Gehyra nana (lineage nana2) (NTM R37597) from Bradshaw Field Training Area, NT (S. Mahony), B) G. nana (nanamulti) (WAM R174051) from Drysdale River National Park, WA (R.J. Ellis), C) G. paranana sp. nov. (NTM R37601) from Bradshaw Field Training Area, NT (S. Mahony), D) G. pseudopunctata sp. nov. (not collected) from near Halls Ck, WA (S. Zozaya), E) G. granulum sp. nov. (WAM R171403) from Prince Regent River National Park, WA (P. Doughty), F) G. granulum sp. nov. (WAM R168561) from Byam Martin Island (P. Doughty), G) G. pluraporosa sp. nov. (WAM R174024) from Theda Station, WA (R.J. Ellis).
FIGURE 7 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 7. Variation within the Gehyra nana complex. Lineages from left to right: nana1, nana4, nana4, nanamulti. All specimens from WAM (scale bar = 10 mm).
FIGURE 12 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 12. Holotype of Gehyra granulum sp. nov. (WAM R176212) from Bell Gorge, WA (scale bar = 10 mm).
Predictors of phylogeographic structure among codistributed taxa across the complex Australian monsoonal tropics
<p class="MsoCommentText"><span>Differences in the geographic scale and depth of phylogeographic structure across codistributed taxa can reveal how microevolutionary processes such as population isolation and persistence drive diversification. In turn, environmental heterogeneity, species' traits, and historical biogeographic barriers may influence the potential for isolation and persistence. Using extensive SNP data and a combination of population genetic summary statistics and landscape genomic analyses, we explored predictors of the scale and depth of phylogeographic structure in codistributed lizard taxa from the topographically and climatically complex monsoonal tropics (AMT) of Australia. We first resolved intraspecific lineages and then tested whether genetic divergence across space within lineages is related to isolation by distance, resistance and/or environment and whether these factors differ across genera or between rock-related versus habitat generalist taxa. We then tested whether microevolutionary processes within lineages explain differences in the geographic scale and depth of intraspecific phylogeographic lineages. The results indicated that landscape predictors of phylogeographic structure differ between taxa. Within lineages, there was prevalent isolation by distance, but the strength of isolation by distance is independent of the taxonomic family, habitat specialization, and climate. Isolation by environment is the strongest predictor of landscape-scale genetic divergence for all taxa, with both temperature and precipitation acting as limiting factors. The strength of isolation by distance does not predict the geographic scale of the phylogeographic structure. However, more localized lineages had higher mean individual heterozygosity and less negative Tajima's D. This result implies that finer-scale phylogeographic structuring within species is associated with larger and more stable populations and, hence, persistence.</span></p>
Data from: A revision of the bioregionalisation of freshwater fish communities in the Australian Monsoonal Tropics
Open the record for dataset details and reuse information.
Predictors of phylogeographic structure among codistributed taxa across the complex Australian monsoonal tropics
Open the record for dataset details and reuse information.
FIGURE 11 in Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species
FIGURE 11. Variation within Gehyra pseudopunctata sp. nov. (scale bar = 10 mm).
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