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844 results for “Central Brazil”
FIGURES 38–44 in A new troglobitic palpigrade from Central Brazil, with notes on a new opisthosomal character (Arachnida: Palpigradi)
FIGURES 38–44. Light (38, 39, 41–44) and SEM (40) micrographs of opisthosomal sternites in several Eukoenenia and Prokoenenia species. 38, Eukoenenia audax sp. nov., holotype, sternites IV–V; 39, Prokoenenia javanica, female holotype (MHNG), sternites IV–VI with dashed ellipses on right side indicating the ventral sacs; 40, E. cf. ferratilis, opisthosomal sternites; 41, Eukoenenia ibitipoca, female paratype (ISLA), sternites IV–VI; 42, Eukoenenia ibitipoca, male holotype (ISLA), sternites IV–V; 43, Eukoenenia navi, female paratype (ISLA12726), sternites IV–V; 44, Eukoenenia navi, male holotype (ISLA), sternites IV–VI. Dashed ellipses indicate the position of opisthosomal cavities. Scale bars: 60 μm.
Data from: Bioacoustics reveals two new syntopic species of Adenomera Steindachner (Anura: Leptodactylidae: Leptodactylinae) in the Cerrado of central Brazil
In this paper, we describe two syntopic species of Adenomera from the Chapada dos Veadeiros microregion, northern State of Goiás, central Brazil, recognized based on morphology, color patterns, and bioacoustics. Specimens and calls were obtained in the Municipality of Teresina de Goiás, central Brazil. Adenomera cotuba sp. nov. is diagnosed from the other 16 congeneric species by its 1) small size (adult male SVL 18.6–20.5 mm) and very robust body; 2) dorsum glandular/granular with no distinctive dorsal granular rows or dorsolateral folds; 3) black or very dark dorsal coloration with no distinctive color patterns (e.g., dorsolateral or vertebral stripes); 4) toe tips not developed into flattened disks; 5) presence of antebrachial tubercle; and 6) advertisement call consisting of a well-defined series of pulsed calls (7–32 calls/series) with progressive increment in amplitude in the first third of each call series when it reaches a sustained plateau. Adenomera juikitam sp. nov. is diagnosed from the other 16 congeneric species by its 1) dorsum profusely glandular/granular with no distinctive dorsal granular rows or dorsolateral folds; 2) dorsum with a marble-like and red coloration with no distinctive color patterns (e.g., dorsolateral or vertebral stripes); 3) toe tips not developed into flattened disks; 4) small size (adult male SVL 19.1–19.5 mm) and very robust body; and 5) long (148–202 ms) advertisement call composed of 16–21pulses. Both new taxa occur in syntopy, and our data allow us to differentiate them both in temporal (pulses/call) and spectral (frequency peaks) traits of their advertisement calls. Besides, dorsal coloration is distinctive, Adenomera cotuba sp. nov. has a black or very dark-colored dorsum, whereas Adenomera juikitam sp. nov. has a marble-like and red-colored dorsum, in addition to the presence (A. cotuba sp. nov.) or absence (A. juikitam sp. nov.) of antebrachial tubercle.
Data from: Soil types select for plants with matching nutrient‐acquisition and ‐use traits in hyperdiverse and severely nutrient‐impoverished campos rupestres and cerrado in Central Brazil
1. Understanding the mechanisms that underlie the generation of beta-diversity remains a challenge in ecology. Underground plant adaptations to environmental gradients have received relatively little attention. 2. We studied plant nutrient-acquisition strategies and nutrient-use efficiency at three stages of pedogenesis in infertile soils from campos rupestres and on less infertile soil from cerrado sensu stricto in Brazil. All soils support very high plant diversity with high species turnover between soil types at small spatial scales (meters). We expected that differences in nutrient–acquisition and –use strategies would be associated with this high species turnover. With severely decreasing phosphorus (P) availability, we expected the effectiveness of arbuscular mycorrhizal (AM) symbioses for plant P acquisition to decrease, and reliance on non-mycorrhizal strategies (NM) to increase, while maintaining efficient nutrient-use. 3. Concentrations of total soil P and nitrogen (N) were greater in soils in cerrado than in those from campos rupestres, and the more weathered soils from campos rupestres were severely P– and N–impoverished. The proportion of the root length colonised by AM fungi was 71% in the soils from the cerrado and campos rupestres. Conversely, the proportion of species with non-mycorrhizal P-acquisition strategies such as rhizosheaths was greater in the most P-impoverished soils. Leaf [P] and [N] were very low and decreased with decreasing soil [P] and [N]. Leaf N: P ratios suggest P-limitation of plant productivity in the campos rupestres but N-P co-limitation in the cerrado. Photosynthetic rates decreased with increasing P-impoverishment, but photosynthetic P-use efficiency was very high and photosynthetic N-use efficiency moderately high on all soils. Most species had very high P-remobilisation efficiency during leaf senescence (>70%), but only moderate N-remobilisation efficiency (~50%). 4. Synthesis. We observed very high P-use efficiency and moderately high N-use efficiency in campos rupestres and cerrado species, consistent with plant productivity being more strongly limited by P than by N. Our findings demonstrate that different soil characteristics (nutrient availability and soil texture) select for species differing in nutrient-acquisition and -use strategies (especially belowground traits) which is likely key for the very high species turnover at a very small scale between soil types (i.e. beta-diversity) in campos rupestres and cerrado.
Data from: Seasonal variation in foraging group size of crab-eating foxes and hoary foxes in the Cerrado biome, Central Brazil
In regions with a pronounced dry season, such as the Cerrado Biome (Brazilian savannah), climate seasonality may affect food availability for canid species and, consequently, their foraging behavior. We investigated seasonal variation in foraging group size of crab-eating foxes (Cerdocyon thous) and hoary foxes (Pseudalopex vetulus) in the Cerrado region for three consecutive years. Data were obtained by direct observations of foraging foxes during spotlight surveys. Both species were sighted foraging individually or in pairs with or without their juvenile offspring. However, crab-eating foxes foraged in pairs more frequently in the wet season and individually more frequently in the dry season whereas hoary foxes foraged mostly individually throughout the year. The higher frequency of solitary foragers in the dry season is possibly a response to the seasonal shortages in the availability of clumped and locally abundant food resources such as fruit and insects, important items in the diet of the crab-eating fox during the wet season. The absence of seasonal variation in foraging group size of the hoary fox may be related to its specialized food habits, since termites predominate in the diet of this species in both seasons.
FIGURE 1. Simpsonichthys radiosus, UFRJ 6017 in Simpsonichthys radiosus sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new annual killifish from the upper Rio Tocantins basin, central Brazil
FIGURE 1. Simpsonichthys radiosus, UFRJ 6017, male, holotype, 23.4 mm SL (10 days after collection); Brazil: Goiás: Formosa: upper Rio Tocantins basin.
FIGURE 2. Simpsonichthys radiosus, UFRJ 6018 in Simpsonichthys radiosus sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new annual killifish from the upper Rio Tocantins basin, central Brazil
FIGURE 2. Simpsonichthys radiosus, UFRJ 6018, female, paratype, 23.5 mm SL (10 days after collection); Brazil: Goiás: Formosa: upper Rio Tocantins basin.
FIGURE 5 in Corumbataia britskii (Siluriformes: Loricariidae: Hypoptopomatinae) a new species from the upper Rio Paraná basin, Mato Grosso do Sul, Central Brazil
FIGURE 5. Lateral view of the caudalfin indicating color patters in Corumbataia. (A) female of C. britskii; (B) male of C. britskii (arrows indicate clear caudalfin blotches of males); (C) C. tocantinensis; (D) C. cuestae (arrows indicate stripes on unbranched caudalfin rays).
FIGURE 1 in Corumbataia britskii (Siluriformes: Loricariidae: Hypoptopomatinae) a new species from the upper Rio Paraná basin, Mato Grosso do Sul, Central Brazil
FIGURE 1. Lateral, dorsal and ventral views of holotype of Corumbataia britskii, LIRP 5884, 26.0 mm SL.
FIGURE 4 in Corumbataia britskii (Siluriformes: Loricariidae: Hypoptopomatinae) a new species from the upper Rio Paraná basin, Mato Grosso do Sul, Central Brazil
FIGURE 4. Ventral view of pectoral girdle of species of Corumbataia. (A) C. britskii; (B) C. cuestae; (C) C. tocantinensis.
FIGURE 2 in Corumbataia britskii (Siluriformes: Loricariidae: Hypoptopomatinae) a new species from the upper Rio Paraná basin, Mato Grosso do Sul, Central Brazil
FIGURE 2. Type locality of Corumbataia britskii. Córrego Pedra Azul (19º12'15"S 52º43'55"W), Rio Sucuriú, upper Rio Paraná basin, Central Brazil.
FIGURE 3 in Corumbataia britskii (Siluriformes: Loricariidae: Hypoptopomatinae) a new species from the upper Rio Paraná basin, Mato Grosso do Sul, Central Brazil
FIGURE 3. Lateral view of head of Corumbataia. (A) C. britskii, holotype, LIRP 5884, 26.0 mm SL; (B) C. cueatae, LIRP 2774, 29.5mm SL; (C) C. tocantinensis, LBP 1653, 26mm SL. Arrows indicate tip of supraoccipital.
FIGURES 1–9, Megachile frankieana. 1 in A new subgenus and three new species of leafcutter bees, Megachile (Austrosarus) (Hymenoptera, Megachilidae) from central Brazil
FIGURES 1–9, Megachile frankieana. 1, Apical margin of the clypeus of the female. 2, Mandible of the female. 3, Mandible of the female viewed from below to show the cutting edge in the second interspace. 4, Fore coxa of the female showing the ventral process and patch of bristles. 5. Sixth metasomal tergite of the male. 6, Fifth metasomal sternite of the male, 7, Sixth metasomal sternite of the male. 8, Eighth metasomal sternite of the male. 9, Genital capsule of the male.
FIGURE 5–6 in A new species of Hydrodynastes Fitzinger, 1843 from central Brazil (Serpentes: Colubridae: Xenodontinae)
FIGURE 5–6. Hemipenis of Hydrodynastes melanogigas (IBSP 65383). 5, sulcate; 6, asulcate side. Scale bar 5 mm.
FIGURE 1–4 in A new species of Hydrodynastes Fitzinger, 1843 from central Brazil (Serpentes: Colubridae: Xenodontinae)
FIGURE 1–4. Holotype of Hydrodynastes melanogigas (IBSP 65796). 1, dorsal; 2, ventral view; 3, lateral of the head; 4, dorsum of the head.
FIGURE 7 in A new species of Hydrodynastes Fitzinger, 1843 from central Brazil (Serpentes: Colubridae: Xenodontinae)
FIGURE 7. Distribution of the examined specimens of Hydrodynastes. Hydrodynastes melanogigas (triangles); H. gigas (circles); and H. bicinctus (squares).
FIGURE 25 in Taxonomy of Aristeidae (Dendrobranchiata: Penaeoidea) from the central coast of Brazil, collected by the Revizee program, between 19 º and 22 ºS
FIGURE 25. Plesiopenaeus coruscans (Wood-Mason, 1891). Female, cl: 66.6 mm, MNRJ 14525, a) Sternum (numbers showing the eleventh and thirteenth sternites). Male, cl: 54.6 mm, MNRJ 14577, b) Sternum (numbers showing the eleventh and thirteenth sternites); c) Right petasma, anterior; d) Right petasma, posterior; e) Right appendix interna; f) Right appendix interna and appendix masculina; g) Left uropod; h) Telson.
FIGURE 24 in Taxonomy of Aristeidae (Dendrobranchiata: Penaeoidea) from the central coast of Brazil, collected by the Revizee program, between 19 º and 22 ºS
FIGURE 24. Plesiopenaeus coruscans (Wood-Mason, 1891). Male, cl: 54.6 mm, MNRJ 14577, a) Left maxilliped 1; b) Left maxilliped 2; c) Left maxilliped 3; d) Left pereopod 1; e) Left pereopod 2; f) Left pereopod 3; g) Left pereopod 4; h) Left pereopod 5; i) Branchiae position, lateral view (numbers showing the fourth and the thirteenth segments).
FIGURE 22 in Taxonomy of Aristeidae (Dendrobranchiata: Penaeoidea) from the central coast of Brazil, collected by the Revizee program, between 19 º and 22 ºS
FIGURE 22. Plesiopenaeus armatus (Bate, 1881). Female, cl: 55.4 mm, MNRJ 19523, a) Sternum (numbers showing the eleventh and thirteenth sternites). Male, cl: 54.6 mm, MNRJ 14576, b) Sternum (numbers showing the eleventh and thirteenth sternites); c) Right petasma, anterior; d) Right petasma, posterior; e) Right appendix interna; f) Right appendix interna and appendix masculina; g) Left uropod; h) Telson.
FIGURE 21 in Taxonomy of Aristeidae (Dendrobranchiata: Penaeoidea) from the central coast of Brazil, collected by the Revizee program, between 19 º and 22 ºS
FIGURE 21. Plesiopenaeus armatus (Bate, 1881). Male, cl: 54.6 mm, MNRJ 14576, a) Left maxilliped 1; b) Left maxilliped 2; c) Left maxilliped 3; d) Left pereopod 1; e) Left pereopod 2; f) Left pereopod 3; g) Left pereopod 4; h) Left pereopod 5; i) Branchiae position, lateral view (numbers showing the fourth and the thirteenth segments).
FIGURE 19. Hepomadus tener Smith, 1884 in Taxonomy of Aristeidae (Dendrobranchiata: Penaeoidea) from the central coast of Brazil, collected by the Revizee program, between 19 º and 22 ºS
FIGURE 19. Hepomadus tener Smith, 1884. Female, cl: 40.3 mm, MNRJ 14592, a) Sternum (numbers showing the eleventh and thirteenth sternites). Male, cl: 43.7 mm, MNRJ 14581, b) Sternum (numbers showing the eleventh and thirteenth sternites); c) Left petasma, anterior; d) Left petasma, posterior; e) Right appendix interna; f) Right appendix interna and appendix masculina; g) Right uropod; h) Telson.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.