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61 results for “Argiope”
FIGURE 21 in Morphology and taxonomy of the orb-weaving spider genus Mecynogea, and a peculiar species of Argiope (Araneae, Araneidae)
FIGURE 21. Argiope carvalhoi (Mello-Leitão, 1944) new combination, female holotype from Barra do Tapirapés, Santa Terezinha, Mato Grosso, Brazil. (MNRJ 1538): A–F, female epigynum, A, ventral view; B, posterior view; C, lateral view, left side; D, lateral view, right side; E, ventro-lateral view, left side; F, ventro-lateral view, right side. Arrows indicate broken male embolus attached to the copulatory opening. Abbreviations: AB, anterior bulge; CO, copulatory openings; F, flange; LM, lateral margin; Rm, rim; MS, median septum; SL, septal lip. Scale bars: A, 0.1 mm; B, 0.1 mm; C, 0.1 mm; D, 0.1 mm; E, 0.1 mm; F, 0.1 mm.
FIGURE 14 in Argiope hoiseni, a new species of the spider genus Argiope (Araneae, Araneidae) from Peninsular Malaysia based on morphology and molecular analyses
FIGURE 14. Bayesian tree based on the concatenated COI+COII+H3A dataset including GenBank sequences. Numeric values at nodes arranged in an order of Ultrafast ML bootstrap support ǀ Bayesian posterior probability. Abbreviations: CB, Cambodia; ID, Indonesia; MY, Malaysia; SG, Singapore.
FIGURE 13 in Argiope hoiseni, a new species of the spider genus Argiope (Araneae, Araneidae) from Peninsular Malaysia based on morphology and molecular analyses
FIGURE 13. Bayesian tree based on the concatenated 16S+COI+COII+H3A+18S dataset of samples used in this study. Numeric values at nodes arranged in an order of Ultrafast ML bootstrap support ǀ Bayesian posterior probability. Abbreviations: CB, Cambodia; ID, Indonesia; MY, Malaysia; SG, Singapore.
FIGURES 6–12. Argiope hoiseni n in Argiope hoiseni, a new species of the spider genus Argiope (Araneae, Araneidae) from Peninsular Malaysia based on morphology and molecular analyses
FIGURES 6–12. Argiope hoiseni n. sp., female. 6, Dorsal habitus. 7, Ventral habitus. 8, Epigynum, ventral view. 9, Posteroventral view. 10, Lateral view. 11, Posterior view showing copulatory openings (arrows). 12, Dorsal view. Abbreviations: FD, fertilization duct. Scale bars, 6–7, 1mm; 8–12, 0.1mm.
FIGURES 1–5. Argiope hoiseni n in Argiope hoiseni, a new species of the spider genus Argiope (Araneae, Araneidae) from Peninsular Malaysia based on morphology and molecular analyses
FIGURES 1–5. Argiope hoiseni n. sp. 1, Dorsal view of holotype female (UIR181018-AHOI1) and linear-type web stabilimentum. 2, Ventral view. 3, Egg sac. 4, Gravid female (paratype UIR081216-AHOI4) in resting position. 5, Young female cleaning its fangs (paratype UIR040815-AHOI2).
Data from: Northern range expansion of European populations of the wasp spider Argiope bruennichi is associated with global warming correlated genetic admixture and specific temperature adaptations
Poleward range expansions are observed for an increasing number of species, which may be an effect of global warming during the past decades. However, it is still not clear in how far these expansions reflect simple geographical shifts of species ranges, or whether new genetic adaptations play a role as well. Here, we analyse the expansion of the wasp spider Argiope bruennichi into Northern Europe during the last century. We have used a range-wide sampling of contemporary populations and historical specimens from museums to trace the phylogeography and genetic changes associated with the range shift. Based on the analysis of mitochondrial, microsatellite and SNP markers, we observe a higher level of genetic diversity in the expanding populations, apparently due to admixture of formerly isolated lineages. Using reciprocal transplant experiments for testing overwintering tolerance, as well as temperature preference and tolerance tests in the laboratory, we find that the invading spiders have possibly shifted their temperature niche. This may be a key adaptation for survival in Northern latitudes. The museum samples allow a reconstruction of the invasion's genetic history. A first, small-scale range shift started around 1930, in parallel with the onset of global warming. A more massive invasion of Northern Europe associated with genetic admixture and morphological changes occurred in later decades. We suggest that the latter range expansion into far Northern latitudes may be a consequence of the admixture that provided the genetic material for adaptations to new environmental regimes. Hence, global warming could have facilitated the initial admixture of populations and this resulted in genetic lineages with new habitat preferences.
Data from: Eco-genomic analysis of the poleward range expansion of the wasp spider Argiope bruennichi shows rapid adaptation and genomic admixture
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Data from: Northern range expansion of European populations of the wasp spider Argiope bruennichi is associated with global warming correlated genetic admixture and specific temperature adaptations
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Supplementary material 4 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Table S1 : Explanation note: Specimen data including the Genbank accession number.
Supplementary material 3 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Figure S3 : Explanation note: Detailed results from the BEAST analysis summarized in Fig. 1.
Supplementary material 1 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Figure S1 : Explanation note: Bayesian phylogeny based on analysis in MrBayes using CO1 data
Fig. 1 in Distribución de las arañas del género Argiope Audouin, 1826 en la provincia de Málaga, España (Chelicerata, Arachnida, Araneae)
Fig. 1.- Hembras de a.- Argiope bruennichi (Scopoli, 1772); b.- A. lobata (Pallas, 1772); y c.- A. trifasciata (Forskal, 1775). 1c
Fig. 4 in Distribución de las arañas del género Argiope Audouin, 1826 en la provincia de Málaga, España (Chelicerata, Arachnida, Araneae)
Fig. 4.- Argiope trifasciata (Forskal, 1775). a.- Distribución en la provincia de Málaga. b.- Distribución mensual. c.- Distribución altitudinal. d.- Pisos bioclimáticos. e.- Ombroclimas.
Data from: Strategic pheromone signalling by mate searching females of the sexually cannibalistic spider Argiope bruennichi
<p class="MsoNoSpacing">Reproduction often requires finding a mating partner. To this end, females of many arthropods advertise their presence to searching males via volatile chemical signals. Such pheromones are considered low-cost signals, although this notion is based on little evidence and has recently been challenged. Even when utilizing comparatively low-cost signals, females should signal as little as possible to minimize costs while still ensuring mate attraction. Here we test the strategic-signalling hypothesis using <i>Argiope bruennichi</i>. In this orb-weaving spider, egg maturation commences with adult moult and females that do not attract a male in time will lay a large batch of unfertilized eggs approximately three weeks after maturation. Using GC-MS analyses, we show that virgin females enhance their signalling effort, i.e. pheromone quantity per unit body weight, with increasing age and approaching oviposition. We further demonstrate that pheromone release is condition dependent, suggesting the occurrence of physiological costs. Mate choice assays revealed that pheromone quantity is the only predictor of female attractiveness for males. In support of the strategic- signalling hypothesis, pheromone signals by female <i>A. bruennichi</i> become stronger with increased need as well as body weight, and might thus also qualify as an honest signal of female quality.</p>
Figure 5 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Figure 5 - Comparative morphology of the male palpal organ of the widespread Argiope argentata and the new Argiope butchko. No clearly diagnostic features were identified in the new species, though slight differences in the terminal parts of the median apophysis and the embolus are observed and merit further comparative investigation.
Figure 4 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Figure 4 - Female holotype Argiope butchko sp. n. a dorsal b lateral c ventral; Male paratype Argiope butchko sp. n. d dorsal e lateral f ventral g external epigynum h external epigynum illustration showing spermatheca and spiraling ducts i internal epigynum illustration dorsal m palp lateral n palp ventral; Argiope argentata j external epigynum k external epigynum illustration showing spermatheca and spiraling ducts l internal epigynum illustration dorsal o palp lateral p palp ventral.
Figure 1 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Figure 1 - A dated phylogeny of Argiope argentata in the Caribbean, and other Argiope relatives. Shown are the results of tree based species delimitation analyses (GMYC method) on a BEAST phylogeny (node ages in million years) and the location of spiders used in this study (inset picture). Asterisk denotes posterior probability support >95%. The OTUs (operational taxonomic units) correspond to a cryptic species, Argiope butchko sp. n., from Cuba (argentataCU) and populations from other Caribbean islands (argentataCAR) plus mainland (argentataUS) treated as conspecific (Argiope argentata).
Figure 3 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Figure 3 - A haplotype network of Caribbean Argiope argentata and Argiope butchko sp. n. Haplotypes are colored by locality as indicated, circle size reflects number of individuals carrying that haplotype from 1-7 in total, open circles represent unobserved haplotypes. Hash marks indicate mutational differences among haplotypes. Inset photograph is of a female Argiope butchko.
Figure 2 from: Agnarsson I, LeQuier SM, Kuntner M, Cheng R-C, Coddington JA, Binford G (2016) Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new 'cryptic' species from Cuba. ZooKeys 625: 25-44. https://doi.org/10.3897/zookeys.625.8729
Figure 2 - Regression analysis between geographic and genetic distances among all specimens of Argiope argiope s.l. included here. Blue dots and line represent within species comparisons and red dots and line those among the two species as here defined. Black line is regression across all data. Geographical distances well explain genetic distances within species, but not between the species, as expected.
Data from: Strategic pheromone signalling by mate searching females of the sexually cannibalistic spider Argiope bruennichi
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