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37 results for “Dyke”
FIGURES 6–9. 6 in Redescription of the holotype of Bostrichoclerus bicornus Van Dyke, 1938, a rare species of the New World Tillinae Fauna (Coleoptera: Cleridae), with some taxonomic notes
FIGURES 6–9. 6. Prosternum and procoxal cavities of the holotype of B. bicornus, arrows indicate posterior portion of procoxal cavities partially open internally, 7. Mesoventrite of the holotype of B. bicornus, arrows indicate mesepisterna visible in ventral view, 8. Abdomen of the holotype of B. bicornus with metacoxae removed, 9. Abdomen of Cymatodera balteata LeConte with metacoxae removed, arrows indicate perpendicular carinae.
GeaVR-tailored Immersive Virtual Scenario for dykes affecting Tertiary lava units in Eastern Iceland
<p>GeaVR-tailored Immersive Virtual Scenario for dykes affecting Tertiary lava units in Eastern Iceland</p><p> The dataset regards a virtual scenario designed to work with GeaVR software (https://geavr.eu/).</p><p><i><strong>Area of interest:</strong></i> A portion of the eastern and older rift in Iceland, where dykes affect Tertiary lava units.</p><p><i><strong>Aerial extent:</strong></i> 270 x 220 m.</p><p><i><strong>Texture resolution:</strong></i> 1.05 cm/pixel. </p><p><i><strong>Type of scenario:</strong></i> derived from photogrammetry processing – UAV-collected pictures.</p>
Figure 2 in The Platycerus (Coleoptera, Lucanidae) of California, with the recognition of Platycerus cribripennis Van Dyke as a valid species
Figure 2. Male genitalia of P. cribripennis, with sclerotized flagellum on the everted internal sac.
Figure 2 from: Kiew R, Chung-Lu L (2020) Checklist of vascular plants of Klang Gates Quartz Ridge, Malaysia, a 14-km long quartz dyke. PhytoKeys 166: 57-77. https://doi.org/10.3897/phytokeys.166.55778
Figure 2 View of the eastern ridge of Klang Gates Quartz Ridge from summit of western ridge, the summit (foreground) dominated by 2–3 m tall Baeckea frutescens.
Figure 3 from: Kiew R, Chung-Lu L (2020) Checklist of vascular plants of Klang Gates Quartz Ridge, Malaysia, a 14-km long quartz dyke. PhytoKeys 166: 57-77. https://doi.org/10.3897/phytokeys.166.55778
Figure 3 Endemic species in Klang Gates Quartz Ridge: Eulalia milsumi (left) and Aleisanthia rupestris.
Table 1 in A New Record Of Cononotus Lanchesteri Van Dyke (Coleoptera: Pyrochroidae: Agnathinae) In Washington State, With Notes On Habitat
<p><b>Table 1.</b> Dates of collection and number of <i>Cononotus lanchesteri</i> collected during pitfall collection intervals.</p><table><tbody><tr><th>Dates</th><th>Number of specimens</th></tr></tbody><tbody><tr><th>20–28 March 1998</th><td>1</td></tr><tr><th>18–25 April 1998</th><td>1</td></tr><tr><th>1–8 May 1998</th><td>1</td></tr><tr><th>8–15 May 1998</th><td>2</td></tr><tr><th>26 August–5 September 1998</th><td>1</td></tr><tr><th>9–16 April 1999</th><td>1</td></tr><tr><th>11–25 June 1999</th><td>1</td></tr></tbody></table>
Figure 5 from: Averianov A, Dyke G, Danilov I, Skutschas P (2015) The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan. ZooKeys 483: 59-80. https://doi.org/10.3897/zookeys.483.9058
Figure 5 - Paleogeographic map of western Kazakhstan in the Santonian-Campanian, modified and simplified from Sagunov and Tkachev (1975: fig. 23). Legend: a, deep water sea; b, shelf; c, shallow water sea; d, lowland coastal plain; e, elevated land; f, area of phosphate accumulation; g, pterosaur locality; h, clupeomorph locality (Taldysai).
Figure 1 from: Averianov A, Dyke G, Danilov I, Skutschas P (2015) The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan. ZooKeys 483: 59-80. https://doi.org/10.3897/zookeys.483.9058
Figure 1 - Map to show the northeastern Aral Sea region of Kazakhstan and the approximate positions of known Late Cretaceous pterosaur localities (1 Tyulkili 2 Baibishe 3 Akkurgan 4 Buroinak 5 Shakh-Shakh). The lakes in the western part of the map are remnants of the Aral Sea, relics of the Turgai Strait that once connected the Tethys and Arctic oceans.
Figure 4 from: Averianov A, Dyke G, Danilov I, Skutschas P (2015) The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan. ZooKeys 483: 59-80. https://doi.org/10.3897/zookeys.483.9058
Figure 4 - Relative positions of known pterosaur localities of the northeastern Aral Sea region of Kazakhstan in Turonian (A) and Santonian (B) times. These paleogeographic maps are modified from Martinson and Nikitin (1978). Legend: a, sea; b, land; c, pterosaur locality (1 Tyulkili; 2 Baibishe; 3 Akkurgan; 4 Buroinak; 5 Shakh-Shakh); d, estuarian paleoenvironment indicated by marine sharks.
Figure 3 from: Averianov A, Dyke G, Danilov I, Skutschas P (2015) The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan. ZooKeys 483: 59-80. https://doi.org/10.3897/zookeys.483.9058
Figure 3 - Aralazhdarcho bostobensis, ZIN PH 57/43, a proximal fragment of a left humerus in proximal (a), ventral (b), anterior (c), dorsal (d), and posterior (e) views. This specimen is from the Shakh Shakh II locality in the northeasten Aral Sea region of Kazakhstan; Bostobe Formation, Upper Cretaceous (Santonian – lower Campanian). Abbreviations: h, humeral head; pf, pneumatic foramen; uc, ulnar crest. Scale bar is 10 mm.
Figure 2 from: Averianov A, Dyke G, Danilov I, Skutschas P (2015) The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan. ZooKeys 483: 59-80. https://doi.org/10.3897/zookeys.483.9058
Figure 2 - Azhdarcho sp., ZIN PH 56/43, distal fragment of a right ulna in proximal (a), ventral (b), posterior (c), dorsal (d), anterior (e), and distal (f, stereopair) views. This specimen is from the Tyulkili locality in the northeastern Aral Sea region of Kazakhstan; Zhirkindek Formation, Upper Cretaceous (upper Turonian – Coniacian). Abbreviations: das, dorsal articulation surface; ft, groove for flexor tendon; tub, tuberculum; vf, ventral fovea. Scale bar is 10 mm.
Dyke demolition led to a sharp decline in waterbird diversity due to habitat quality reduction: a case study of Dongting Lake, China
Dongting Lake, an important wintering habitat for migratory waterbirds in the East Asian–Australasian Flyway, has suffered serious degradation in recent decades. To restore habitats for biodiversity conservation and flood control, 459 dykes were demolished and 14 were preserved in 2017. However, the direct impact of dyke demolition on wintering waterbirds was not comprehensively assessed. In this study, based on annual waterbird census and habitat data (2013/14–2020/21), we compared the differences in habitat areas and species composition of waterbirds in the dyke-demolished and preserved areas, and explored whether habitat changes caused by the dyke demolition were responsible for the changes in the number of species and percentages of waterbird individuals. The results indicate that the areas of water (including shallow water) and mudflat habitats significantly decreased, but the vegetation area significantly increased in the dyke-demolished areas. The species numbers and percentages of waterbird individuals at the community and foraging guilds levels, and the percentages of nine species, were higher in the dyke-preserved areas than those in the dyke-demolished areas. Changes in the numbers of species and percentages of individuals of fish eaters, insectivores, and omnivores positively correlated with drastic changes in the percentages of water habitats (including shallow water) after dyke demolition. Effective measures should be carried out to restore hydrological regimes, providing waterbirds sufficient suitable habitats with different water depths. These findings improve our understanding of the influence of dyke demolition on waterbirds and provide insights for wetland management and waterbird conservation. --
Dyke demolition led to a sharp decline in waterbird diversity due to habitat quality reduction: a case study of Dongting Lake, China
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Figure 1 in The Platycerus (Coleoptera, Lucanidae) of California, with the recognition of Platycerus cribripennis Van Dyke as a valid species
Figure 1. Known distribution of Platycerus cribripennis in California.
Figure 1 from: Kiew R, Chung-Lu L (2020) Checklist of vascular plants of Klang Gates Quartz Ridge, Malaysia, a 14-km long quartz dyke. PhytoKeys 166: 57-77. https://doi.org/10.3897/phytokeys.166.55778
Figure 1 Rhodoleia championii, one of the dominant tree species on the summit.
FIGURES 1–5. 1 in Redescription of the holotype of Bostrichoclerus bicornus Van Dyke, 1938, a rare species of the New World Tillinae Fauna (Coleoptera: Cleridae), with some taxonomic notes
FIGURES 1–5. 1. Habitus of the holotype of B. bicornus, 2. Close-up of the frons in dorsal view of the holotype of B. bicornus, 3. Head in dorsolateral view the holotype of B. bicornus, 4. Head and antennae in dorsal view of the holotype of B. bicornus, 5. Head in dorsal view of the holotype of B. bicornus.
Supplementary Datasets for: Chapter 6: Timescales of dyke intrusion events in the Main Ethiopian Rift through olivine Fe-Mg diffusion chronometry
<p>Supplementary datasets for Chapter 6: Timescales of dyke intrusion events in the Main Ethiopian Rift through olivine Fe-Mg diffusion chronometry.</p> <p>Dataset S1: Standards, secondary standards, geochemical data and timescale data of olivine Fe-Mg diffusion profiles and carrier glasses.<br> Dataset S2: Combined and sorted dataset of greyscale images.</p>
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