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33 results for “Ascension Island”
Figure 2. Hentzia antillana Bryant, 1940 in A Caribbean in the South Atlantic: first records of Hentzia antillana Bryant 1940, with notes on other previously reported jumping spider species (Araneae: Salticidae), from Ascension Island
Figure 2. Hentzia antillana Bryant, 1940 adult male (A–B) and female (C–D) from Ascension Island. A, Right male palp, ventral view. B, Same, retrolateral view. C, Epigyne, ventral view. D, Epigyne, dorsal view.
Figure 1. Hentzia antillana Bryant, 1940 in A Caribbean in the South Atlantic: first records of Hentzia antillana Bryant 1940, with notes on other previously reported jumping spider species (Araneae: Salticidae), from Ascension Island
Figure 1. Hentzia antillana Bryant, 1940 adult male (A–C) and female (D–F) from Ascension Island. A, Male, habitus, dorsal. B, Same, ventral. C, Male, frontal view of eyes and chelicerae. D, Female habitus, dorsal. E, Same, ventral. F, Female, frontal view of eyes and chelicerae.
Discophallus ascension sampling on Ascension Island in 2023
<p>Community dataset for the article "<span>Invasive insect colonisation shapes the population distribution of an island-endemic scaly cricket</span>" in Insect Conservation and Diversity.</p>
FIGURE 3 in Amnestus mendeli sp. n., the first burrower bug species (Hemiptera: Heteroptera: Cydnidae) recorded on Ascension Island, central Atlantic Ocean
FIGURE 3. Amnestus mendeli, paratype male: (A) body ventral view; (B) prosternal carinae (transverse carina, tc: additional longitudinal carina behind the transverse carina, alc); (E) anterior femur (furcate spine indicated by the arrow); (F) posterior femur (subapical denticle indicated by the arrow); (G) lateral part of abdomen showing long adherent, shiny hair-like setae. Amnestus pusillus (C), Amnestus lenkoi (D, from Froeschner, 1975, modified): prosternal carinae (transverse carina, tc).
FIGURE 2 in Amnestus mendeli sp. n., the first burrower bug species (Hemiptera: Heteroptera: Cydnidae) recorded on Ascension Island, central Atlantic Ocean
FIGURE 2. Amnestus mendeli: (A) holotype male, body dorsal view; (B) holotype male, head, dorsal view (graphically darkened for better visibility of marginal pegs); (C–D) paramere, dorsal view (C), ventral view (D).
FIGURE 1 in Amnestus mendeli sp. n., the first burrower bug species (Hemiptera: Heteroptera: Cydnidae) recorded on Ascension Island, central Atlantic Ocean
FIGURE 1. Collection locality of Amnestus mendeli: (A) Green Mountain (approximate position of Windy Corner indicated by the arrow) (photo Alan Gray); (B) habitat where specimens of A. mendeli have been collected (photo Howard Mendel).
FIGURE 2. Ascension oonopids, cont. A–B in On the identity of Opopaea euphorbicola Strand, 1909 and first records of three other non-native goblin spiders from Ascension Island (Araneae: Oonopidae)
FIGURE 2. Ascension oonopids, cont. A–B Heteroonops spinimanus (Simon, 1892) (ASC NE500), C–D Ischnothyreus peltifer (Simon, 1892) (ASC L17 2 PFJ). A, C habitus, dorsal view. B, D epigyne (undissected), ventral view. Scale bars = 1mm (A, C), 0.2mm (B, D).
FIGURE 1. Ascension oonopids. A–G Opopaea euphorbicola Stand, 1909 in On the identity of Opopaea euphorbicola Strand, 1909 and first records of three other non-native goblin spiders from Ascension Island (Araneae: Oonopidae)
FIGURE 1. Ascension oonopids. A–G Opopaea euphorbicola Stand, 1909 (BMNH), H–I Brignolia dasysterna Platnick, Dupérré, Ott & Kranz-Baltensperger, 2011 (ASC K17 2 LC). A–D neotype male (designated herein) of O. euphorbicola, A habitus, dorsal view, B same, ventral view, C palp, prolateral view, pink arrow indicates keel at tip of palpal bulb, D same, dorsoretrolateral view. E–G non-type female of O. euphorbicola, E habitus, dorsal view, F same, ventral view, G epigyne, ventral view. H–I B. dasysterna, H cephalothorax, ventral view, showcasing distinctive sternal morphology, indicated by pink arrow, I close-up of palp in dorso-prolateral view, pink arrow indicates keel at tip of palpal bulb. Scale bars = 0.2mm (A–B, E–F, H), 0.05mm (C–D, G, I).
Fig. 8 in A newScopula from mid-Atlantic Ascension Island (Lepidoptera, Geometridae)
Fig. 8: Larva of Scopula ascensionis spec. nov., lateral view. – Fig. 9: Larva of Scopula ascensionis spec. nov., dorsal view. – Fig. 10: Exuviae of Scopula ascensionis spec. nov. – Fig. 11: Cremaster of pupa ofScopula ascensionis spec. nov.
Fig. 6 in A newScopula from mid-Atlantic Ascension Island (Lepidoptera, Geometridae)
Fig. 6: -genitalia, holotype of Scopula ascensionis spec. nov., gen. slide 3582, KARISCH. – Fig. 7: -genitalia, paratype of Scopula ascensionis spec. nov., gen. slide 3616, KARISCH.
FIGURES 13–18 in Angusticopula rowlingiana, a new melosiroid diatom (Bacillariophyta) from Ascension Island (South Atlantic Ocean)
FIGURES 13–18. Angusticopula rowlingiana Van de Vijver, Wilfert, D.M.John & Houk sp. nov. Scanning electron microscope pictures taken from the holotype population (sample from Bamboo) from Green Mountain, Ascension Island. Fig. 13 External (mantle) view of one valve together with an internal valve; several narrow copulae are visible. Fig. 14. External (mantle) view of an internal valve show its typical domed structure and the granules. Note the dense concentration of granules on the lower part of the internal valve (see arrows) and the numerous narrow copulae with fimbriate lower part (black arrows). Fig. 15. External valve face view showing the marginal granules and the very small pores on the valve face. Fig. 16. External detail of the margin of the valve face with a dense number of small, rounded granules and small pores. Fig. 17. Internal view of an entire valve showing the position of the rimoportulae (arrows). Fig. 18. Internal detail of the valve face surface with the rimoportulae (arrows) and small pores. Scale bars represent 10 μm in Figs 13–15 & 17 and 1 μm in Figs 16 & 18.
FIGURES 1–12 in Angusticopula rowlingiana, a new melosiroid diatom (Bacillariophyta) from Ascension Island (South Atlantic Ocean)
FIGURES 1–12. Angusticopula rowlingiana Van de Vijver, Wilfert, D.M.John & Houk sp. nov. Light microscope pictures taken from the holotype population (sample from Bamboo) from Green Mountain, Ascension Island. Figs 1–3 LM photographs of several frustules and valves in girdle and valve face view showing numerous discoid plastids. Figs 4–7 LM photographs of frustules in girdle view. Figs 6 & 7 show the presence of internal valves. Figs 8–12 LM photographs in valve face view. Scale bar represents 10 μm.
FIGURE 5 in Cyperus stroudii (CYPERACEAE), a new species from Ascension Island, South Atlantic Ocean
FIGURE 5. Close up of Cyperus stroudii characters (a) spikelets, glumes and nutlet (x 8 magnification red line is 6.4 mm) and (b) Nutlet(x 32 magnification yellow line is 1.6 mm).
FIGURE 2 in Cyperus stroudii (CYPERACEAE), a new species from Ascension Island, South Atlantic Ocean
FIGURE 2. (a) Principal Co-ordinate analysis using the Gower metric of morphological variables between two morphotypes grown under common environmental conditions from seed collected from Ascension Islands. (b) Principal co-ordinate analysis of Ascension plants and herbarium specimens collected across the geographic range. Lines represent convex hulls round geographically separated populations.
FIGURE 1 in Cyperus stroudii (CYPERACEAE), a new species from Ascension Island, South Atlantic Ocean
FIGURE 1. Tall (a) and dwarf (b) morphotype populations assumed to be C. appendiculatus (c) location of seed collection sampling from each of the two Cyperus populations on Ascension.
FIGURE 3 in Cyperus stroudii (CYPERACEAE), a new species from Ascension Island, South Atlantic Ocean
FIGURE 3. Boundary of the type locality for Cyperus stroudii marked in red and place names mentioned in the text.
FIGURE 1 in The fern genus Dryopteris (Dryopteridaceae) in Ascension and Saint Helena islands, Atlantic Ocean
FIGURE 1. Pinnules, scales and indusium of Dryopteris ascensionis. A, abaxial surface of proximal part of basal pinna showing the venation and basiscopic development; B, stipe scale; C & D, rachis scales; E & F, pinna-rachis scales; G lamina scales: abaxial surface; H & I, hairs from abaxial surface of lamina; J, indusium; Bb, Dd & Jj showing cellular structure of scales and indusium. Illustrations all based on Gordon 119 (K). Scale bars: A, 5 mm; B–F, I, 0.5 mm; G, H, Bb–Jj, 0.1 mm. Illustrations prepared by J.P. Roux.
FIGURE 4 in The fern genus Dryopteris (Dryopteridaceae) in Ascension and Saint Helena islands, Atlantic Ocean
FIGURE 4. Lectotype of Dryopteris napoleonis (Bory) Kuntze, Bèlangé s.n. (P00301433). MNNH, Paris Herbarium, 2012.
FIGURE 3 in The fern genus Dryopteris (Dryopteridaceae) in Ascension and Saint Helena islands, Atlantic Ocean
FIGURE 3. Pinnules, scales and indusium of Dryopteris napoleonis. A, abaxial surface of pinnules showing the venation and sori; B & C, stipe scales; D & E, rachis scales; F & G, pinna-rachis scales; H & I, hairs from abaxial surface of lamina; J, indusium; Dd, Ff & Jj showing cellular structure of scales and indusium. Illustrations all based on Burchell 172 (K). Scale bars: A, 5 mm; B, 0.5 mm; C–G, 0.5 mm; H–J, 0.1 mm; Dd–Jj, 0.1 mm. Illustrations prepared by J.P. Roux.
FIGURE 2 in The fern genus Dryopteris (Dryopteridaceae) in Ascension and Saint Helena islands, Atlantic Ocean
FIGURE 2. Pinnules, scales and indusium of Dryopteris cognata. A, abaxial surface of pinnules showing the venation and sori; B & C, stipe scales; D, rachis scale; E & F, pinna-rachis scales; G & H, lamina scales: abaxial surface; I, indusium; Bb, Dd, Ff, Gg & Ii showing cellular structure of scales and indusium. Illustrations all based on Hooker s.n. (K). Scale bars: A, 5 mm; B–H, 0.5 mm; I, 1 mm; Bb–Ii, 0.1 mm. Illustrations prepared by J.P. Roux.
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OpenNeuro
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