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15,460 results for “Neotrops”
Fig. 5 in Lectotype designation and redescription of four commonly collected Neotropical species of Strumigenys (Hymenoptera: Formicidae)
Fig. 5. Lectotype of Strumigenys eggersi Emery, 1890 (CC-BY, CASENT0904936, Will Ericson, from www.antweb.org). A. Head, mandibles and antennae, in dorsal view. B. Full body, in lateral view. C. Full body, in dorsal view.
Data from: Seasonality, body size and maturation time in the neotropical grasshopper Sphenarium histrio across an altitudinal gradient
<p>In insects, male mating success and female fecundity usually increase with body size. However, natural selection favors faster maturation, reducing the risk of pre-reproductive death when the reproductive season is short in habitats located at high altitudes or far from the equator. Also, if males that mature earlier than females under these conditions increase their mating opportunities, protandry may evolve in their populations. Nonetheless, since body size is strongly correlated with maturation time in insects, a faster sexual maturation is reached at the expense of having a small body size. We analyzed the differences in the adult body size of males and females of the grasshopper Sphenarium histrio in three sites across an altitudinal gradient in southern Mexico. We also evaluated the possibility of protandry in these sampling sites using a common garden experiment. Male and female grasshoppers collected from low altitude sites in the field and reared in the laboratory were larger than those from a high altitude, suggesting genetic differentiation. Grasshoppers from a high altitude hatched earlier, had a shorter development time, presented fewer instars, and were smaller than grasshoppers from the other sampling sites. Moreover, development time in the three sampling sites was shorter in males than in females, suggesting protandry. Interestingly, the males from the three sites showed similar growth rates, but the females from low and high altitudes, respectively, had the fastest and slowest growth rates. In general, the adaptive value of the evolution of protandry has been focused on males. However, it may be that the growth rates of females in these sites could modify the degree of protandry as a response to their risk of pre-reproductive death and the potential benefits associated with multiple matings.</p> <p>The xlsx file contains the data for all the statistical analyses.</p>
An Experimental Test of Lanchester's Models of Combat in the Neotropical Termite Nasutitermes corniger (Blattodea: Termitidae)
<p><span>Lanchester's models of combat have been invoked to explain the mechanics of group fighting in social animals. Specifically, Lanchester's square law posits that the fighting ability of the group is proportional to the square of the number of combatants. Although used to explain a variety of ecological phenomena, the models have not been thoroughly tested. We tested the Lanchester models using group battles between colonies of the termite <em>Nasutitermes corniger</em>. Our main goals were to determine if mortality rates fit the Lanchester models, and if so, whether the behavioural mechanisms underlying a group's success match those used in deriving the model. We initiated battles between pairs of colonies with different ratios of fighters and recorded deaths over time. We found that the numerically larger army has an advantage, but that the advantage is not as pronounced as predicted by Lanchester's square law. We also video-recorded battles to analyse individual behaviour, which did not support the mechanisms invoked by Lanchester. Instead, the killing power of an individual is increased by the presence of nestmates, giving the larger group a disproportionate advantage. Although the behavioural mechanisms leading to the advantage may differ, our results still support some of the proposed ecological phenomena.</span></p>
Fig. 13 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 13. Dexosarcophaga pallida sp. nov., ♂, paratype (NHRS [lost]), Colombia, Caquetá, Chiribiquete National Park. A. Habitus, lateral view. B. Terminalia, lateral view.
Fig. 12 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 12. Dexosarcophaga pallida sp. nov., ♂, holotype (NHRS [lost]). A. Sternite 5, ventral view. B. Syntergosternite 7 + 8, epandrium, cercus and surstylus, lateral view. C. Cerci, posterior view. D. Phallus and associated structures, lateral view. E. Distiphallus, ventral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 2 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 2. Dexosarcophaga phoenix sp. nov., ♀, paratype (MNRJ [lost]), Brazil, Minas Gerais, Nova Lima, Lagoa Grande. A. Terminalia and abdominal sternites, ventral view. B. Terminalia, ventral view. C. Spermatheca, lateral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 9 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 9. Dexosarcophaga sphaera sp. nov., ♂, paratype (MNRJ [lost]), Brazil, Minas Gerais, Uberlândia. A. Sternite 5, ventral view. B. Syntergosternite 7 + 8, epandrium, cercus and surstylus, lateral view. C. Cerci, posterior view. D. Phallus and associated structures, lateral view. E. Distiphallus, ventral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 11 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 11. Dexosarcophaga napo sp. nov., ♂, holotype (NHRS [lost]). A. Sternite 5, ventral view. B. Syntergosternite 7 + 8, epandrium, cercus and surstylus, lateral view. C. Cerci, posterior view. D. Phallus and associated structures, lateral view. E. Distiphallus, ventral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 6 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 6. Dexosarcophaga limon sp. nov., ♂, holotype (INBio [lost]). A. Sternite 5, ventral view. B. Syntergosternite 7 + 8, epandrium, cercus and surstylus, lateral view. C. Cerci, posterior view. D. Phallus and associated structures, lateral view. E. Distiphallus, ventral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 1 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 1. Dexosarcophaga phoenix sp. nov., ♂, paratype (MNRJ [lost]), Brazil, Brasília, Distrito Federal. A. Sternite 5, ventral view. B. Syntergosternite 7 + 8, epandrium, cercus and surstylus, lateral view. C. Cerci, posterior view. D. Phallus and associated structures, lateral view. E. Distiphallus, ventral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 8 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 8. Dexosarcophaga spp., ♂ and ♀, habitus and terminalia. A. Dexosarcophaga petra sp. nov., ♂, paratype (MNRJ [lost]), Brazil, Mato Grosso, Chapada dos Guimarães, terminalia, lateral view. B–D. Dexosarcophaga sphaera sp. nov., paratypes (MNRJ [lost]), Brazil, Brasília, Distrito Federal, Fazenda Vargem Bonita. B. ♂, habitus, lateral view. C. ♂, terminalia, lateral view. D. ♀, terminalia, ventral view. E–F. Dexosarcophaga napo sp. nov., ♂, paratype (NHRS [lost]), Ecuador, Napo Prov. E. Habitus, lateral view. F. Terminalia, lateral view. Scale bars = 1.0 mm.
Fig. 4 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 4. Dexosarcophaga jandainae sp. nov., ♂, holotype (MNRJ [lost]). A. Sternite 5, ventral view. B. Syntergosternite 7 + 8, epandrium, cercus and surstylus, lateral view. C. Cerci, posterior view. D. Phallus and associated structures, lateral view. E. Distiphallus, ventral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 3 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 3. Dexosarcophaga spp., male habitus and terminalia. A–B. Dexosarcophaga phoenix sp. nov., holotype (MNRJ [lost]). A. Habitus, lateral view. B. Terminalia, lateral view. C–D. Dexosarcophaga jandainae sp. nov., ♂, paratype (MZUSP [lost]), Brazil, Mato Grosso, Chapada dos Guimarães. C. Habitus, lateral view. D. Terminalia, lateral view. E. Dexosarcophaga patiuorum sp. nov., ♂, holotype (MNRJ [lost]), habitus, lateral view. F. Dexosarcophaga limon sp. nov., ♂, holotype (INBio [lost]), habitus, lateral view. Scale bars = 1.0 mm.
Fig. 5 in Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region
Fig. 5. Dexosarcophaga patiuorum sp. nov., ♂, holotype (MNRJ [lost]). A. Syntergosternite 7 + 8, epandrium, cercus and surstylus, lateral view. B. Cerci, posterior view. C. Phallus and associated structures, lateral view. D. Distiphallus, ventral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.
Fig. 64. Cyparium oberthueri Pic, 1956 in Contributions to the taxonomy of Neotropical Cyparium Erichson (Coleoptera: Staphylinidae: Scaphidiinae), with the description of five new species
Fig. 64. Cyparium oberthueri Pic, 1956 (MNHN collection-Paris).A. Habitus. B. Labels.C. Distribution. Squares = P. Germain itinerary; circles = new records.
Fig. 61. Cyparium oberthueri Pic, 1956 in Contributions to the taxonomy of Neotropical Cyparium Erichson (Coleoptera: Staphylinidae: Scaphidiinae), with the description of five new species
Fig. 61. Cyparium oberthueri Pic, 1956, ♂♂ (CELC). A–B. Abdomen. A. Dorsal view. B. Ventral view. C. Ventrite 1. D. Tergite VIII. E. Terminalia. F. Tergite IX. G. Sternite VIII. Specimens collected at Mata da Biologia, Viçosa (MG, Brazil). Scale bars: A, C–G = 0.2 mm; B = 0.5 mm.
Fig. 60. Cyparium oberthueri Pic, 1956 in Contributions to the taxonomy of Neotropical Cyparium Erichson (Coleoptera: Staphylinidae: Scaphidiinae), with the description of five new species
Fig. 60. Cyparium oberthueri Pic, 1956, ♂♂ (CELC). A–B. Metendosternite. A. Dorsal view. B. Lateral view. C–D. Elytron. C. Entire. D. Apex. E. Hind wing. F–H. Legs. F. Fore. G. Middle. H. Hind. Specimens collected at Mata da Biologia, Viçosa (MG, Brazil). Scale bars = 0.5 mm.
Fig. 57. Cyparium oberthueri Pic, 1956 in Contributions to the taxonomy of Neotropical Cyparium Erichson (Coleoptera: Staphylinidae: Scaphidiinae), with the description of five new species
Fig. 57. Cyparium oberthueri Pic, 1956 (CELC). A. Frontal view. B. Male antenna. C. Female antenna. D. Labrum. E. Left mandible. F. Right mandible. G. Maxilla. Specimens collected at Mata da Biologia, Viçosa (MG, Brazil) (CELC). Scale bars: A–C = 0.2 mm; D–G = 0.1 mm.
Fig. 54. Cyparium collare Pic, 1920 in Contributions to the taxonomy of Neotropical Cyparium Erichson (Coleoptera: Staphylinidae: Scaphidiinae), with the description of five new species
Fig. 54. Cyparium collare Pic, 1920, ♀ (CELC). A. Tergite VIII. B. Sternite VIII. C. Terminalia. D. Sclerite of vaginal plate. E. Ovipositor. Specimen collected at Mata do Paraíso, Viçosa (MG, Brazil). Scale bars: A–B, D–E = 0.1 mm; C = 0.2 mm.
Fig. 52. Cyparium collare Pic, 1920 in Contributions to the taxonomy of Neotropical Cyparium Erichson (Coleoptera: Staphylinidae: Scaphidiinae), with the description of five new species
Fig. 52. Cyparium collare Pic, 1920, ♂♂ (CELC). A–B. Abdomen. A. Dorsal view. B. Ventral view. C. Ventrite 1. D. Tergite VIII. E. Terminalia. F. Tergite IX. G. Sternite VIII. Specimens collected at Mata do Paraíso, Viçosa (MG, Brazil). Scale bars = 0.2 mm.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.