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35 results for “Micrathena”
Figure 11 in Phylogenetic analysis of Micrathena and Chaetacis spiders (Araneae: Araneidae) reveals multiple origins of extreme sexual size dimorphism and long abdominal spines
Figure 11. Optimization of female (left) and male (right) carapace lengths under a squared-change parsimony model. Values are expressed in millimetres. Darker values indicate greater lengths and the scale is the same for both sexes. The greater the difference of tone between males and females, the higher the sexual size dimorphism for a given species. Micrathena spiders are highlighted by the grey background.
Figure 7 in Phylogenetic analysis of Micrathena and Chaetacis spiders (Araneae: Araneidae) reveals multiple origins of extreme sexual size dimorphism and long abdominal spines
Figure 7. Character optimizations of the discrete data set in the tree obtained through implied-weighted parsimony (k = 5). Character numbers are indicated above circles and character states are indicated below circles. Filled circles indicate convergence-free apomorphies, open circles represent homoplasious synapomorphies. For character descriptions, see Appendix 1. The grids near the nodes represent a sensitivity analysis using different values of k; open cells represent presence of the corresponding clade in a given weighting scheme, whereas filled cells represent its absence. Different Micrathena species groups are indicated by the alternating background colour. Scale bar = 2.0 mm. All spiders (females at left, males at right) drawn to scale and printed approximately at natural sizes. Continued in Figs 8 and 9.
Figures 5–6. Optimal trees obtained under Bayesian analyses. Fig. 5. Mkv model. Fig. 6 in Phylogenetic analysis of Micrathena and Chaetacis spiders (Araneae: Araneidae) reveals multiple origins of extreme sexual size dimorphism and long abdominal spines
Figures 5–6. Optimal trees obtained under Bayesian analyses. Fig. 5. Mkv model. Fig. 6. MkvG model. Posterior probabilities values are indicated below branches.
Figures 3–4. Optimal trees obtained under parsimony analyses. Fig. 3 in Phylogenetic analysis of Micrathena and Chaetacis spiders (Araneae: Araneidae) reveals multiple origins of extreme sexual size dimorphism and long abdominal spines
Figures 3–4. Optimal trees obtained under parsimony analyses. Fig. 3. Unweighted analysis [length = 575.3; consistency index (CI) = 0.305; retention index (RI) = 0.693]. Fig. 4. Implied weighted analysis (k = 5; length = 579.718; fit = 105; CI = 0.303; RI = 0.689). Bremer supports and symmetric resampling values are indicated below and above branches, respectively. Symmetric resampling values are given in frequency differences (GC; Goloboff et al., 2003).
Figures 1–2. Abdominal spine homology and measurements taken for this study. Fig. 1 in Phylogenetic analysis of Micrathena and Chaetacis spiders (Araneae: Araneidae) reveals multiple origins of extreme sexual size dimorphism and long abdominal spines
Figures 1–2. Abdominal spine homology and measurements taken for this study. Fig. 1. Chaetacis bandeirante, female habitus, dorsal. Arrows indicate primary apodemes. Fig. 2. Chaetacis bandeirante, female habitus, lateral. Abbreviations: AS, anterior spine; AW, abdomen width; CL, carapace length; CW, carapace width; ES, eye interdistance; FL, femur length; FSL, first posterior spine length; LS1, first lateral spine; LS2, second lateral spine; LS3, third lateral spine; PS1, first posterior spine; PS2, second posterior spine; PS3, third posterior spine; RW, rim width; SCL, spinneret cone length. Scale bars = 1 mm.
FIGURES 1–2 in On the male of the orb weaving spider Micrathena cyanospina (Lucas, 1835) (Araneidae, Araneae)
FIGURES 1–2. Micrathena cyanospina, male from Pico da Neblina, São Gabriel da Cachoeira, Amazonas. 1. Dorsal. 2. Lateral.
FIGURE 6 in On the male of the orb weaving spider Micrathena cyanospina (Lucas, 1835) (Araneidae, Araneae)
FIGURE 6. Micrathena cyanospina, adult female, from Pico da Neblina, São Gabriel da Cachoeira, Amazonas, (Photo by R.P. Indicatti).
FIGURES 3–5 in On the male of the orb weaving spider Micrathena cyanospina (Lucas, 1835) (Araneidae, Araneae)
FIGURES 3–5. Micrathena cyanospina: 3. Male from Pico da Neblina, São Gabriel da Cachoeira, Amazonas, dorsal. 4–5. Male palp. 4. Mesal. 5. Lateral. Abbreviations: A, terminal apophysis; C, conductor; Cy, cymbium; E, embolus; M, median apophysis; P. paracymbium; T, tegulum. Scale bars: figure 3 - 1 mm, figures 4 and 5 - 0.5mm.
Figure 8. Fig. 7 in Phylogenetic analysis of Micrathena and Chaetacis spiders (Araneae: Araneidae) reveals multiple origins of extreme sexual size dimorphism and long abdominal spines
Figure 8. Fig. 7 continued. Scale bar = 2.0 mm.
Figure 9. Fig. 8 in Phylogenetic analysis of Micrathena and Chaetacis spiders (Araneae: Araneidae) reveals multiple origins of extreme sexual size dimorphism and long abdominal spines
Figure 9. Fig. 8 continued. Scale bar = 2.0 mm.
FIGURE 6 in Rectifying the identities of the males of two Micrathena species (Araneae Araneidae), with report of the first case of intersexuality in the genus
FIGURE 6. Micrathena lata, male from Argentina, Misiones (MACN-Ar 3866). A, habitus dorsal. B, habitus lateral. C–G, left palp. C, prolateral. D, embolus, apical. E, retrolateral. F, prolateral, clove oil cleared. G, details of embolus. Scale bars, 1 mm (A, B); 0.1 mm (C–F); 0.05 mm (G). Abbreviations: c = conductor, cl = conductor lobe, e = embolus, em = embolic membrane, ta = terminal apophysis.
FIGURE 2 in Rectifying the identities of the males of two Micrathena species (Araneae Araneidae), with report of the first case of intersexuality in the genus
FIGURE 2. Micrathena ruschii from Brazil, Rio de Janeiro, Macaé, habitus. A–C, male. A, dorsal. B, lateral. C, ventral. D, female, dorsal. Scale bars, 1 mm.
FIGURE 4. Male left palps. A in Rectifying the identities of the males of two Micrathena species (Araneae Araneidae), with report of the first case of intersexuality in the genus
FIGURE 4. Male left palps. A, Micrathena ruschii from Brazil, Rio de Janeiro, Macaé (UFRJ 1519), prolateral. B, Micrathena lata, male from Argentina, Misiones (MACN-Ar 3866), prolateral. C, same, retrolateral, detail of paracymbium. Scale bars = 0.1 mm. Abbreviations: bp = basal projection of the median apophysis, c = conductor, cl = conductor lobe, cy = cymbium, e = embolus, em = embolic membrane, l = median apophysis lobe, m = median apophysis rim, pm = paramedian apophysis, r = radix, ta = terminal apophysis, tap = terminal apophysis projection, ti = tibial projection, tp = tegular projection.
FIGURE 3 in Rectifying the identities of the males of two Micrathena species (Araneae Araneidae), with report of the first case of intersexuality in the genus
FIGURE 3. Micrathena ruschii from Brazil, Rio de Janeiro, Macaé, male left palps. A, prolateral. B, Subretrolateral. C–D, male (UFRJ 1519). C, retrolateral. D, prolateral, clove oil cleared. Scale bars, 0.1 mm.
FIGURE 1 in Rectifying the identities of the males of two Micrathena species (Araneae Araneidae), with report of the first case of intersexuality in the genus
FIGURE 1. Sequence similarity among selected Micrathena COI sequences inferred using the neighbor-joining method. Nodal support estimated with bootstrap (1000 replicates) shown next to the branches.
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