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1,369 results for “sexual dimorphism”
Morphometric study and sexual dimorphism analyses in an Iranian population of Scorpio maurus (Arachnida: Scorpionidae)
<p><i>Scorpio maurus</i> (Scorpiones: Scorpionidae) which has a worldwide distribution, indicates levels of sexual dimorphism. Morphometry is used to determine the sexual dimorphism between the two sexes. In this study, 53 morphological characters of 15 specimens of each sex of <i>Scorpio maurus</i> were studied, however dimorphism was only observed in 21 morphological characters, including chelicerae and carapace length, pedipalp characters, width of the second segment of metasoma, telson and pectin length, number of left pectin teeth, and some of the leg's segments.</p>
Figure 7 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 7 Wing Interference Pattern on excised wings of male/ female pair of two species of TipuloideaANephrotoma ferruguina female BNephrotoma ferruguina male CNephrotoma macrocera female DNephrotoma macrocera male ENephrotoma virscens female FNephrotoma virscens male. Scale bars: 1.0 mm.
Figure 9 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 9 Images showing WIP on several species of crane fly in nature A male Tipula (Yamatotipula) aprilina Alexander, 1918 displaying WIP in nature B female Tipula (Yamatotipula) aprilina displaying WIP in nature C pair of Gnophomyia tristissima perched on a leaf in copula. Both flies are displaying their sexually dimorphic WIP. The female (bottom) has a blue WIP while the male (top) displays a green WIPD an individual of Elliptera clausa Osten Sacken, 1877 displaying a WIP with wings folded. Sex unknown. Copyright (A, B) 2021, photograph JK Gelhaus; (C) 2020, photograph Katja Schulz, used with permission by the artist and under a creative commons license (https://creativecommons.org/licenses/by/4.0/) with alterations limited to cropping and resizing of this image; (D) 2016, photograph JK Gelhaus. Images are not to scale.
Figure 6 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 6 Wing Interference Pattern on excised wings of male/ female pair of two species of TipuloideaABrachypremna dispellens female BBrachypremna dispellens male CHolorusia hespera female DHolorusia hespera male. Scale bars: 1.0 mm (A, B), 1.0 cm (C, D).
Figure 5 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 5 Wing Interference Pattern on excised wings of male/ female pair of two species of TipuloideaATricyphona inconstans inconstans female BTricyphona inconstans inconstans male CDolichopeza obscura female DDolichopeza obscura male. Scale bars: 1.0 mm.
Figure 4 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 4 Wing Interference Pattern on excised wings of male/ female pair of two species of TipuloideaADactylolabis cubitalis female BDactylolabis cubitalis male CDicranomyia liberta female DDicranomyia liberta male. Scale bars: 1.0 mm.
Figure 3 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 3 Wing Interference Pattern on excised wings of male/ female pair of two species of Tipuloidea. Excised wings of a male/ female pair of two species of crane flies. Wings were excised, flattened between a glass slide and cover slip, and photographed under a microscope using transmitted light ACylindrotoma distinctissima female BCylindrotoma distinctissima male CGnophomyia tristissima female DGnophomyia tristissima male. Scale bars: 1.0 mm.
Figure 1 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 1 Comparison of the variation in WIP of three female and three male specimens of Gnophomyia tristissima. Females examined in this study were found to have a range of WIP from A dark blue/ purple B blue with mottled yellow C green/yellow with hints of blue which appeared most like the male WIP. Males examined also had a range of WIP from D green with mottled blue which appeared most like the female WIPE solidly green F green with mottled magenta. Patterns B and E were the most encountered patterns for females and males, respectively. Scale bars: 1.0 mm.
Figure 2 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 2 Excised wing of a male specimen of Dolichopeza obscura against a white background with notations of wing veins and cells used in this study. Veins are noted in blue with uppercase letters while cells are noted in red with lowercase letters; naming and notations follow those of Saigusa (2006). Abbreviations: A/a: anal vein/cell, bm: basal medial cell, br: basal radial cell, C/c: costal vein/cell, CuA/cua: anterior cubitus vein/cell, CuP/cup: posterior cubitus vein/cell, d: discal cell, M/m: Medial vein/cell, R/r: radial vein/cell, Rs: radial sector vein, Sc/sc: subcostal vein/cell. Image not to scale.
Supplementary material 1 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Movie S1
Figure 8 from: Conrow RT, Gelhaus JK (2022) Wing interference patterns are consistent and sexually dimorphic in the four families of crane flies (Diptera, Tipuloidea). ZooKeys 1080: 135-163. https://doi.org/10.3897/zookeys.1080.69060
Figure 8 Wing Interference Pattern on excised wings of male/ female pair of two species of TipuloideaATipula (Beringotipula) borealis female BTipula (Beringotipula) borealis male CTipula (Yamatotipula) sayi female DTipula (Yamatotipula) sayi male. Scale bars: 1.0 mm.
A role for sex determination genes in life history evolution? Doublesex mediates sexual size dimorphism in the gazelle dung beetle
<p>An organism's fitness depends strongly on its age and size at maturation. Although the evolutionary forces acting on these critical life history traits have been heavily scrutinized, the developmental mechanisms underpinning intraspecific variation in adult size and development time remain much less well understood. Using RNA interference, I here show that the highly conserved sex determination gene <i>doublesex </i>(<i>dsx</i>) mediates sexual size dimorphism (SSD) in the gazelle dung beetle <i>Digitonthophagus gazella</i>. Because <i>doublesex</i> undergoes sex-specific splicing and sex-limited isoforms regulate different target genes, this suggests <i>dsx</i> contributes to the resolution of intralocus sexual conflict in body size. However, these results contrast with previous studies demonstrating that <i>dsx </i>does not affect body size or SSD in <i>Drosophila</i>. This indicates that intraspecific body size variation is underlain by different developmental mechanisms in different insect lineages. Furthermore, although male <i>D. gazella</i> have a longer development time than females, sexual bimaturism was not affected by <i>dsx</i> expression knockdown. In addition, and in contrast to secondary sexual morphology, <i>dsx</i> did not significantly affect nutritional plasticity in life history. Taken together, these findings indicate that <i>dsx</i> signaling contributes to intraspecific life history variation but that <i>dsx</i>'s function in sexual dimorphism in life history differs among traits and species. More generally, these findings suggest that genes ancestrally tasked with sex determination have been coopted into the developmental regulation of life history traits and may represent an underappreciated mechanism of life history evolution.</p>
FIGURE 1 in An interesting sexually dimorphic species, Neoribates isabelaensis sp. nov. (Acari, Oribatida, Parakalummidae) with remarks on sexual dimorphism in Oripodoidea
FIGURE 1. Neoribates isabelaensis sp. nov., adult: malE, dorsal viEW. ScalE bar 50 µm.
FIGURE 12 in Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from Paraguay (Insecta: Coleoptera: Elmidae: Elminae)
FIGURE 12. Capilla Cue, Neoelmis guarani collection site.
FIGURE 11 in Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from Paraguay (Insecta: Coleoptera: Elmidae: Elminae)
FIGURE 11. Arroyo Mborebí, Neoelmis guarani collection site.
FIGURE 10 in Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from Paraguay (Insecta: Coleoptera: Elmidae: Elminae)
FIGURE 10. Arroyo Naranjo, type locality of Neoelmis guarani.
FIGURE 6 in Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from Paraguay (Insecta: Coleoptera: Elmidae: Elminae)
FIGURE 6. Neoelmis guarani, aedeagus, A—dorsal view, B—lateral view. Scale bar = 0.1 mm.
FIGURE 8 in Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from Paraguay (Insecta: Coleoptera: Elmidae: Elminae)
FIGURE 8. Neoelmis guarani, female lateral habitus; length 2.3 mm.
FIGURE 9 in Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from Paraguay (Insecta: Coleoptera: Elmidae: Elminae)
FIGURE 9. Arroyo Naranjo, type locality of Neoelmis guarani.
FIGURE 1 in Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from Paraguay (Insecta: Coleoptera: Elmidae: Elminae)
FIGURE 1. Neoelmis guarani, male dorsal habitus; length 2.1 mm.
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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)
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.