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16 results for “Acanthogonatus”
Figure 3. a in Fight or flight: agonistic interactions between females of Acanthogonatus centralis Goloboff 1995 (Araneae, Mygalomorphae)
Figure 3. a: Female A. centralis displaying threat behavior (fangs extended). b: Hug finished in cannibalism with female biting the female cephalothorax.
Figure 2 in Fight or flight: agonistic interactions between females of Acanthogonatus centralis Goloboff 1995 (Araneae, Mygalomorphae)
Figure 2. Flow diagram of the female–female interaction of A. centralis (n = 132). Arrows indicate frequency.
Figure 5 in Do disturbed environments affect density of the tunnel-web spider Acanthogonatus centralis (Mygalomorphae: Nemesiidae) from native grasslands in Argentina?
Figure 5. Spatial distribution of A. centralis plotted from the four 10 × 10 quadrants during autumn at Cerro Ceferino, Sierra de la Ventana, Argentina. Circles: males; triangles: females; squares: juveniles.
Figure 4 in Do disturbed environments affect density of the tunnel-web spider Acanthogonatus centralis (Mygalomorphae: Nemesiidae) from native grasslands in Argentina?
Figure 4. Seasonal density of A. centralis (spiders/m2). Nonsignificant differences were found among seasons (F: 1.03; P = 0.43).
Figure 1 in Do disturbed environments affect density of the tunnel-web spider Acanthogonatus centralis (Mygalomorphae: Nemesiidae) from native grasslands in Argentina?
Figure 1. Details of the 3 sampling sites in Sierra de la Ventana, Buenos Aires, Argentina. A: Ernesto Tornquist Provincial Park, considered to be at low disturbance level (LD); B: Funke Ranch, considered to be at medium disturbance level (MD); C: Cerro Ceferino, considered to be at high disturbance level (HD).
FIG. 3 in A new small Acanthogonatus Karsch, 1880 (Mygalomorphae, Pycnothelidae) species from Argentinean Patagonia: description of A. messii Signorotto & Ferretti n. sp. and its phylogenetic placement
FIG. 3. — Acanthogonatus messii Signorotto & Ferretti n. sp., holotype male: A, carapace, dorsal view; B, sternum, ventral view; C, abdomen, dorsal view; D, abdomen, ventral view; E, labium and maxillae, ventral view; F, eyes, dorsal view; G, chelicerae, prolateral view (green arrow indicates intercheliceral tumescence); H, leg I, prolateral view; I, leg I, ventral view. Abbreviations: Mt, metatarsus, Tap, tibial apophysis, Ti, tibia. Scale bars: A-D, F-I, 1 mm, E, 0.5 mm.
FIG. 4 in A new small Acanthogonatus Karsch, 1880 (Mygalomorphae, Pycnothelidae) species from Argentinean Patagonia: description of A. messii Signorotto & Ferretti n. sp. and its phylogenetic placement
FIG. 4. — Acanthogonatus messii Signorotto & Ferretti n. sp., holotype male: A-D, palpal bulb. A, prolateral view; B, dorsal view (green arrow indicates the keel); C, retrolateral view (green arrow indicates the keel); D, dorsal view; E, palp, prolateral view; F, palp, retrolateral view. Abbreviations: Cy, cymbium; Ti, tibia. Scale bars: 1 mm.
FIG. 1 in A new small Acanthogonatus Karsch, 1880 (Mygalomorphae, Pycnothelidae) species from Argentinean Patagonia: description of A. messii Signorotto & Ferretti n. sp. and its phylogenetic placement
FIG. 1. — Acanthogonatus notatus (Mello-Leitão, 1940), male: A-D, male holotype; E, male (CAI); A, palp, prolateral view; B, palp, ventral view; C, palp, retrolateral; E, palpal bulb, dorsal view (green arrow indicates the denticles on embolus). Abbreviations: Mt, metatarsus, Tap, tibial apophysis, Ti, tibia. Scale bars: A-D, 1 mm; E, 0.5 mm.
FIG. 5 in A new small Acanthogonatus Karsch, 1880 (Mygalomorphae, Pycnothelidae) species from Argentinean Patagonia: description of A. messii Signorotto & Ferretti n. sp. and its phylogenetic placement
FIG. 5. — Acanthogonatus messii Signorotto & Ferretti n. sp., paratype female: A, carapace, dorsal view; B, sternum, ventral view; C, abdomen, dorsal view; D, abdomen, ventral view; E, labium and maxillae, ventral view; F, eyes, dorsal view; G, leg IV, ventral view; H, spermathecae. Scale bars: A-G, 1 mm, H, 0.5 mm.
FIG. 2 in A new small Acanthogonatus Karsch, 1880 (Mygalomorphae, Pycnothelidae) species from Argentinean Patagonia: description of A. messii Signorotto & Ferretti n. sp. and its phylogenetic placement
FIG. 2. — Acanthogonatus messii Signorotto & Ferretti n. sp., habitus: A, female molted in laboratory; B, female collected and photographed from field; C, male molted in laboratory; D, male collected walking in the field. Scale bars: 1 cm.
FIG. 6. — A in A new small Acanthogonatus Karsch, 1880 (Mygalomorphae, Pycnothelidae) species from Argentinean Patagonia: description of A. messii Signorotto & Ferretti n. sp. and its phylogenetic placement
FIG. 6. — A, habitat at type locality of Acanthogonatus messii Signorotto & Ferretti n. sp.; B, C, female burrows opened at night at type locality.
FIG. 7 in A new small Acanthogonatus Karsch, 1880 (Mygalomorphae, Pycnothelidae) species from Argentinean Patagonia: description of A. messii Signorotto & Ferretti n. sp. and its phylogenetic placement
FIG. 7. — Most parsimonious cladogram using IW. Symbols: black squares: exclusive synapomorphies; white squares: homoplasies. Numbers above the circles: characters; below: states. Species group notations follows Goloboff (1995).
Figure 3 in Do disturbed environments affect density of the tunnel-web spider Acanthogonatus centralis (Mygalomorphae: Nemesiidae) from native grasslands in Argentina?
Figure 3. Relationship between the density of potential shelters and the density of spiders.
Fig. 2 in Feeding Frequency, Prey Acceptance, and Natural Diet of the Mygalomorph Spider Acanthogonatus centralis Goloboff 1995 (Araneae: Nemesiidae)
Fig. 2. Comparison of the mean time to the first attack (± SE) for the most accepted prey: beetle larvae (n = 17), termites (n = 14), crickets, (n = 4) and cockroaches (n = 7). *Significant differences.
Fig. 1 in Feeding Frequency, Prey Acceptance, and Natural Diet of the Mygalomorph Spider Acanthogonatus centralis Goloboff 1995 (Araneae: Nemesiidae)
Fig. 1. Percent acceptance for different kinds of prey by A. centralis in captivity.
Figure 1. Females A in Fight or flight: agonistic interactions between females of Acanthogonatus centralis Goloboff 1995 (Araneae, Mygalomorphae)
Figure 1. Females A. centralis in their tunnel webs before experiments.
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