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42 results for “Namib Desert”
FIGURE 4 in A review of Cordylus machadoi (Squamata: Cordylidae) in southwestern Angola, with the description of a new species from the Pro-Namib desert
FIGURE 4. Dorsal, lateral, and ventral views of A) Cordylus namakuiyus sp. nov. (CAS 254912, holotype) and B) C. machadoi (PEM R 18006).
FIGURE 3 in A review of Cordylus machadoi (Squamata: Cordylidae) in southwestern Angola, with the description of a new species from the Pro-Namib desert
FIGURE 3. Maximum likelihood phylogeny of 11 - gene dataset of Cordylus. Bootstrap support for MP and ML shown above branches, Bayesian posterior probabilities below. The new species, Cordylus namakuiyus sp. nov., is highlighted for reference. The numbered circles to the right of the Angolan specimens correspond to the numbered localities in Figure 2.
FIGURE 2 in A review of Cordylus machadoi (Squamata: Cordylidae) in southwestern Angola, with the description of a new species from the Pro-Namib desert
FIGURE 2. Map showing localities for Cordylus in Angola and Namibia. Cordylus namakuiyus sp. nov. 1) Iona national park: PEM R 18005, 2) Pico Azevedo: CAS 254754, 254755, 256529 – 31, 3) Caraculo: CAS 254912, 256529, 4) Iona National Park: TM 40430. C. machadoi: 5) Humpata environs: PEM R 18006 – 8, 19782, 19784, 6) Nasecute do Tchiviuguira: PEM R 18009, 7) NMN 7002, 8) TM 40131 – 3, 9) TM 40095, 40096. C. cf. machadoi: 10) Otjihipa Mountains: NCN – FN 377, 378, 11) Baynes Mountains: TM 57561, NCN-FP 402, 403, 12) Sera de Neve (sight record, P. Vaz Pinto), 13) C. angolensis, Caconda: type locality, and 14) Mombolo: AMNH 47331 – 35.
FIGURE 1 in A review of Cordylus machadoi (Squamata: Cordylidae) in southwestern Angola, with the description of a new species from the Pro-Namib desert
FIGURE 1. Head and body diagrams of Cordylus sp. (AMNH 47301, "Angola") from an unpublished species description by Charles M. Bogert, illustrated by Alma W. Froderstrom, reproduced with the permission of the Department of Herpetology at the American Museum of Natural History
FIGURE 2 in A review of Cordylus machadoi (Squamata: Cordylidae) in southwestern Angola, with the description of a new species from the Pro-Namib desert
FIGURE 2. Map showing localities for Cordylus in Angola and Namibia. Cordylus namakuiyus sp. nov. 1) Iona national park: PEM R18005, 2) Pico Azevedo: CAS 254754, 254755, 256529–31, 3) Caraculo: CAS 254912, 256529, 4) Iona National Park: TM 40430. C. machadoi: 5) Humpata environs: PEM R18006–8, 19782, 19784, 6) Nasecute do Tchiviuguira: PEM R18009, 7) NMN 7002, 8) TM 40131–3, 9) TM 40095, 40096. C. cf. machadoi: 10) Otjihipa Mountains: NCN–FN 377, 378, 11) Baynes Mountains: TM 57561, NCN-FP 402, 403, 12) Sera de Neve (sight record, P. Vaz Pinto), 13) C. angolensis, Caconda: type locality, and 14) Mombolo: AMNH 47331–35.
FIGURE 4 in A review of Cordylus machadoi (Squamata: Cordylidae) in southwestern Angola, with the description of a new species from the Pro-Namib desert
FIGURE 4. Dorsal, lateral, and ventral views of A) Cordylus namakuiyus sp. nov. (CAS 254912, holotype) and B) C. machadoi (PEM R18006).
FIGURE 3 in A review of Cordylus machadoi (Squamata: Cordylidae) in southwestern Angola, with the description of a new species from the Pro-Namib desert
FIGURE 3. Maximum likelihood phylogeny of 11-gene dataset of Cordylus. Bootstrap support for MP and ML shown above branches, Bayesian posterior probabilities below. The new species, Cordylus namakuiyus sp. nov., is highlighted for reference. The numbered circles to the right of the Angolan specimens correspond to the numbered localities in Figure 2.
Subspecies and Distribution. S. s. suricatta Schreber, 1776 — Botswana, South Africa, possibly Lesotho, and Kalahari Desert in Namibia. S. s. iona Cabral, 1971 — SW Angola. S. s. marjoniae Bradfield, 1936 — Namibia (Namib Desert). in Herpestidae
Subspecies and Distribution. S. s. suricatta Schreber, 1776 — Botswana, South Africa, possibly Lesotho, and Kalahari Desert in Namibia. S. s. iona Cabral, 1971 — SW Angola. S. s. marjoniae Bradfield, 1936 — Namibia (Namib Desert).
Subspecies and Distribution. E.z.zebraLinnaeus,1758—SSouthAfrica(S&WedgeofthecentralplateauintheEasternandWesternCapeProvinces). E. z. hartmannae Matschie, 1898 — W Namibia (mountainous transition zone between the Namib Desert and the Namibian central plateau); possibly in SW Angola. in Equidae
Subspecies and Distribution. E.z.zebraLinnaeus,1758—SSouthAfrica(S&WedgeofthecentralplateauintheEasternandWesternCapeProvinces). E. z. hartmannae Matschie, 1898 — W Namibia (mountainous transition zone between the Namib Desert and the Namibian central plateau); possibly in SW Angola.
FIGURE 2 in A new species of Osteospermum subgen. Tripteris (Asteraceae: Calenduleae) from the Namib Desert, Namibia
FIGURE 2. Osteospermum namibense: di- and trichotomous branching. A. Live plant. B. Woody remains of a dead plant. Photographs by W. Swanepoel.
FIGURE 1 in A new species of Osteospermum subgen. Tripteris (Asteraceae: Calenduleae) from the Namib Desert, Namibia
FIGURE 1: Osteospermum namibense: Habit and habitat. A. Plant, ca. 0.4 m high, with dead leaves persisting on older stems. B. Plant partially buried by windblown sand; note leaves arranged in rosettes. Photographs by W. Swanepoel.
FIGURE 3 in A new species of Osteospermum subgen. Tripteris (Asteraceae: Calenduleae) from the Namib Desert, Namibia
FIGURE 3. Osteospermum namibense: flower and fruiting heads, as well as leaves. A. Flower head viewed from above, with two visiting flies in the family Diptera: Mythicomyiidae. B. Leaves and side view of flower head; note succulence of leaves and sand grains sticking to gland-covered surfaces. C. Fruiting head with mature achenes. Photographs by W. Swanepoel.
Namib Desert gravel plains nematodes
<p>Soil nematodes are fundamentally aquatic animals, requiring water to move, feed, and reproduce. Nonetheless, they are ubiquitous in desert soils because they can enter an anhydrobiotic state that allows them to persist when water is biologically unavailable.</p> <p>In the hyper-arid Namib Desert of Namibia, rain is rare, but fog routinely moves inland from the coast and supports plant and animal life. Very little is understood about how this fog may affect soil organisms. We investigated the role of fog moisture in the ecology of free-living, soil nematodes across an 87-km fog gradient in the gravel plains of the Namib Desert.</p> <p>We found that nematodes emerged from anhydrobiosis and became active during a fog event, suggesting that they can utilize fog moisture to survive.</p> <p>There was no difference in soil nematode abundance across the fog gradient. Nematode abundance was similar under shrubs and in interplant spaces. Interplant soils harbor biological soil crusts that may sustain nematode communities.</p> <p>As fog declined along the gradient, nematode diversity increased in interplant soils. In areas where fog is rare, sporadic rainfall events can stimulate the germination and growth of desert ephemerals that may have a lasting effect on nematode diversity.</p> <p>In a 30-day incubation experiment, nematodes increased in abundance when soils were amended with water and organic matter. However, these responses were not evident in field samples, which show no correlations among nematode abundance, location in the fog gradient, and soil organic matter content.</p> <p>Soil nematodes are found throughout the Namib Desert gravel plains under a variety of conditions. Although shown to be moisture- and organic matter-limited and able to use moisture from fog for activity, variation in fog frequency and soil organic matter across this unique ecosystem may be biologically irrelevant to soil nematodes in situ.</p>
Distribution. Broadly distributed in S Africa, C & S Angola, S DR Congo, W Zambia, Namibia (except in Namib Desert), Botswana, Zimbabwe (exceptin the N), S Mozambique, and much of South Africa (except most of Western Cape, Mpumalanga, and KwaZulu-Natal provinces). in Pedetidae
Distribution. Broadly distributed in S Africa, C & S Angola, S DR Congo, W Zambia, Namibia (except in Namib Desert), Botswana, Zimbabwe (exceptin the N), S Mozambique, and much of South Africa (except most of Western Cape, Mpumalanga, and KwaZulu-Natal provinces).
Subspecies and Distribution. E.g.grantiBroom,1907—StrandveldSucculentKaroo,WcoastofSouthAfrica. E. g. namibensis Bauer & Niethammer, 1960 — Sossusvlei, Namib Desert, W Namibia. in Chrysochloridae
Subspecies and Distribution. E.g.grantiBroom,1907—StrandveldSucculentKaroo,WcoastofSouthAfrica. E. g. namibensis Bauer & Niethammer, 1960 — Sossusvlei, Namib Desert, W Namibia.
Fig. 1 in A Fatal Agonistic Interaction between Ant and Darkling Beetle (Coleoptera: Tenebrionidae: Pimeliinae: Adesmiini) in the Northern Namib Desert
Fig. 1. Ventral and dorsal views of the specimen of Onymacris bicolor with an ant head (Camponotus fulvopilosus) attached to its right antenna.
Data from: Ancient landscapes of the Namib Desert harbour high levels of genetic variability and deeply divergent lineages for Collembola
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Namib Desert gravel plains nematodes
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FIGURE 4 in A new species of Osteospermum subgen. Tripteris (Asteraceae: Calenduleae) from the Namib Desert, Namibia
FIGURE 4. Known distribution (black dots) of Osteospermum namibense.
Spotted hyaena (Crocuta crocuta) feeding ecology and selectivity of large herbivorous prey in the Namib Desert
<p>We have investigated the relationship between spotted hyaenas in the south Namib Desert and large herbivorous prey, and have summarized an updated overview of predator-prey relationships in this resource-limited arid environment. Over the 52-month study, we recorded the densities (#/km<sup>-2</sup>, <u>+</u> SE) of the four local large herbivorous prey species: gemsbok (1.229, <u>+</u> 0.50), springbok (1.352, <u>+</u> 0.48), ostrich (0.648, <u>+</u> 0.23), and greater kudu (0.343, <u>+</u> 0.00). A faecal analysis was performed on 146 collected spotted hyaena scats, and prey items were identified and hairs cross-follicle analysed to the species level. Spotted hyaena diet at the study area remained opportunistic with 240 identified prey items representing eight differing prey species being recorded, ranging from ostrich eggs to large ungulates. The Ivlev's Electivity Index was used to determine which large herbivorous prey was most selected for. Although gemsbok had a higher representation of prey items in the sampled scats, all sampled large herbivorous prey species scored below 0, and are thus generally avoided in relation to their availability in the environment. If any prey preferences are expressed by spotted hyaena in the Namib, it can be presumed to be a non-sampled prey species. We therefore promote further detailed investigations into all other prey species present, and seasonal variations of prey densities and scat sampling, within the study environment.</p>
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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