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1,369 results for “sexual dimorphism”
Fig 1 in Sexual Dimorphism in Three Species of Heterelmis Sharp (Coleoptera: Elmidae)
Fig 1. Heterelmis comalensis, representative female (a–c), and male (d–f) abdomens showing variation in length of the fifth (last) ventrite. Females are recognizable by noticeably more elongate fifth ventrite. Scale bar = 500 µm.
Fig. 3 in Sexual Dimorphism in Three Species of Heterelmis Sharp (Coleoptera: Elmidae)
Fig. 3. Observed frequency distributions of three body characteristics of male and female Heterelmis cf. glabra (n = 102 individuals). a) Total body length (in mm), b) Abdominal length (in mm), c) Fifth ventrite length (in mm). The vertical dashed line in panel c is a proposed fifth ventrite size threshold (0.28 mm) that could be used to determine sex using this feature.
Fig. 4 in Sexual Dimorphism in Three Species of Heterelmis Sharp (Coleoptera: Elmidae)
Fig. 4. Observed frequency distributions of three body characteristics of male and female Heterelmis vulnerata (n = 61 individuals). a) Total body length (in mm), b) Abdominal length (in mm), c) Fifth ventrite length (in mm). The vertical dashed line in panel c is a proposed fifth ventrite size threshold (0.26 mm) that could be used to determine sex using this feature.
Genetic variation for sexual dimorphism in developmental traits in Drosophila melanogaster
<p>Sexual dimorphism in traits of insects during the developmental stages could potentially be the direct or indirect result of sex-specific selection provided that genetic variation for sexual dimorphism is present. We investigated genetic variation in sexual dimorphism in a set of <em>Drosophila melanogaster</em> inbred lines for two traits: egg to adult development time and pupation site preference. We observed considerable genetic variation in sexual dimorphism among lines in both traits. The sexual dimorphic patterns remained relatively consistent across multiple trials, despite both traits being sensitive to environmental conditions. Additionally, we measured two sexually dimorphic adult morphological traits in six sampled lines and investigated correlations in the sexual dimorphism patterns with the two developmental traits. The abundance of genetic variation in sexual dimorphism for <em>D. melanogaster </em>developmental traits demonstrated in this study provides evidence for a high degree of evolvability of sex differences in pre-adult traits in natural populations.</p>
Sexual dimorphism in the first rib of Homo sapiens
<p>The databases included here comprise:</p> <p>First_Rib_Linear_Data: 12 metric variables of 121 right and left first ribs from 65 female and male adult recent Euro-American <em>Homo sapiens</em> individuals.</p> <p>First_Rib_GMM_Data: Six landmarks and 31 semilandmarks of 112 of these ribs.</p>
FIGURES 5–18. O in Otostigmus (Otostigmus) xizangensis n. sp., from China and a case of sexual dimorphism in the subgenus Otostigmus (Otostigmus) Porat, 1876 (Chilopoda, Scolopendromorpha, Scolopendridae)
FIGURES 5–18. O. (O.) xizangensis n. sp., Holotype (figs 5, 6, 8, 10–13); Paratype (Ar.-MHU-SoBM1705250502, figs 7, 9, 14, 15; the dissected female, Ar.-MHU-SoBM1705250515, fig. 16; the dissected male, Ar.-MHU-SoBM1705250516, figs 17–18) 5: Head and tergite 1, dorsal view; 6–7: Cephalic plate, dorsal view; 8–9: Forcipular segment, ventral view; 10–11: Legbearing segments 13–17, dorsal and ventral views; 12–15: Ultimate leg-bearing segment and ultimate legs, dorsal and ventral views; 16–17: Ultimate leg-bearing segment and ultimate legs, ventral view; 18: Three pairs of testes. Scale bar (6, 8, 9, 12): 1 mm, scale bars (5, 7, 10, 11, 13–18): 2 mm. Abbreviations: (bs)—basal suture of tooth-plate, (gp)—glabrous basal portion of antennal article 3, (pt)—process of trochanteroprefemur (tp)—tooth-plate, (md)—median depression, (mk)—tergal median keel, (S17)—sternite 17, (us)— ultimate sternite, (cp)—coxopleural process.
FIGURE 6 in An interesting sexually dimorphic species, Chamobates callipygis Pavlichenko, 1991 (Acari, Oribatida, Chamobatidae), with remarks on sexual dimorphism in Ceratozetoidea
FIGURE 6. Chamobates callipygis, dissected adult, microscope images: A—mediodistal part of lamella; B—bothridial seta; C—tutorial cusp; D—posteromedian protuberance in male; E—part of subcapitular mentum; F—part of epimeral region; G— part of podosomal region; H—prodorsal and humeral porose areas; I—mediodistal part of pedotectum I; J—part of genital plate; K—leg genu I; L—leg femur I.
FIGURE 5 in An interesting sexually dimorphic species, Chamobates callipygis Pavlichenko, 1991 (Acari, Oribatida, Chamobatidae), with remarks on sexual dimorphism in Ceratozetoidea
FIGURE 5. Chamobates callipygis, adult, SEM micrographs: A—dorsoanterior view (female); B—dorsoposterior view (male); C—posteromedian protuberance, dorsoanterior view (male); D—right lateral view (male); E—partially subcapitulum, epimeral and podosomal regions, right lateral view; F—partially epimeral and genital regions, lateral view; G—right bothridial seta, antiaxial view; H—right bothridium, dorsal view; I—partially aggenital region. Scale bar 100 μm (A, B, D), 20 μm (C, E), 10 μm (F–I).
FIGURE 4 in An interesting sexually dimorphic species, Chamobates callipygis Pavlichenko, 1991 (Acari, Oribatida, Chamobatidae), with remarks on sexual dimorphism in Ceratozetoidea
FIGURE 4. Chamobates callipygis, adult (A, C—females; B, D—males), SEM micrographs: A, B —dorsal view, male with transverse striations on notogaster indicated by arrow; C, D —ventral view. Scale bar 100 μm.
FIGURE 3 in An interesting sexually dimorphic species, Chamobates callipygis Pavlichenko, 1991 (Acari, Oribatida, Chamobatidae), with remarks on sexual dimorphism in Ceratozetoidea
FIGURE 3. Chamobates callipygis, adult: A—subcapitulum, ventral view; B—palp, left, antiaxial view; C—chelicera, right, antiaxial view; D—leg I, right, antiaxial view; E—leg II, without tarsus, right, antiaxial view; F—leg III, without tarsus, left, antiaxial view; G—leg IV, left, antiaxial view. Scale bar 20 μm (A, C–G), 10 μm (B).
FIGURE 1 in An interesting sexually dimorphic species, Chamobates callipygis Pavlichenko, 1991 (Acari, Oribatida, Chamobatidae), with remarks on sexual dimorphism in Ceratozetoidea
FIGURE 1. Chamobates callipygis, adult: A—dorsal view of female (legs not shown); B—posterior part of body in male, dorsal view; C—ventral view of female (gnathosoma and legs except trochanters not shown); D—posterior part of body in male, ventral view. Scale bar 50 μm.
FIGURE 2 in An interesting sexually dimorphic species, Chamobates callipygis Pavlichenko, 1991 (Acari, Oribatida, Chamobatidae), with remarks on sexual dimorphism in Ceratozetoidea
FIGURE 2. Chamobates callipygis, adult: A—variations of bothridial setae; B—right lateral view of female; C—posterior part of body in male, right lateral view; D—rostrum, anterior view; E—posterior view of female; F—posterior view of male (porose areas A3 not visible due to posteromedian protuberance). Scale bar 20 μm (A, D), 50 μm (B, C, E, F).
FIGURE 1 in A new sexually dimorphic Hyphessobrycon from the western Amazon basin (Characiformes: Characidae)
FIGURE 1. Hyphessobrycon bayleyi: (A) ZUEC 17121, holotype, male, 33.4 mm SL: Brazil, Amazonas, igarapé do Palhau (tributary of rio Javari); (B) ZUEC 15501, paratype, female, 34.1 mm SL: same locality.
FIGURE 4 in A new sexually dimorphic Hyphessobrycon from the western Amazon basin (Characiformes: Characidae)
FIGURE 4. Hyphessobrycon bayleyi, anterior portion of anal fin in a whole specimen (INPA 57267, 30.8 mm SL) and a cleared and stained specimen (INPA 57267, 30.4 mm SL), showing the large fin hook at the last unbranched anal-fin ray.
FIGURE 6. Hemigrammus boesemani, NRM 70353 in A new sexually dimorphic Hyphessobrycon from the western Amazon basin (Characiformes: Characidae)
FIGURE 6. Hemigrammus boesemani, NRM 70353, female, 27.8 mm SL: French Guyana, Kourou, Crique Corossony.
FIGURE 5 in A new sexually dimorphic Hyphessobrycon from the western Amazon basin (Characiformes: Characidae)
FIGURE 5. Map of western portion of the Amazon basin, showing the distribution of Hyphessobrycon bayleyi (white dots). The red star indicates the type locality, the blue dot a locality from the literature (Lüling, 1981; see Discussion), and the black dot a tentative identification (see Remarks).
FIGURE 3. Hyphessobrycon bayleyi, INPA 57267, 30.4 in A new sexually dimorphic Hyphessobrycon from the western Amazon basin (Characiformes: Characidae)
FIGURE 3. Hyphessobrycon bayleyi, INPA 57267, 30.4 mm SL: dentary, premaxillary, and maxillary, lateral view. Scale bar: 1 mm.
FIGURE 2 in A new sexually dimorphic Hyphessobrycon from the western Amazon basin (Characiformes: Characidae)
FIGURE 2. Hyphessobrycon bayleyi: (A) ZUEC 15475, paratype, female, 37.2 mm SL: Brazil, Amazonas, igarapé do Adolfo (tributary of rio Javari); (B) INPA 56395, paratype, male, 30.2 mm SL: Brazil, Amazonas, rio Itaquaí basin; in life.
FIGURE 5 in Unusual sexually dimorphic head morphology in Lauxaniidae (Diptera: Lauxanioidea)-a new species of the genus Trivialia Malloch from Peru
FIGURE 5. Trivialia aitupa, sp. nov., paratype female, terminalia. A. Dorsal view. B. Lateral view. C. Ventral view. D. Spermathecae. Measure bar = 0.1 mm. Abbreviations: c = cercus; e = epiproct; h = hypoproct; s8 = sternite 8; st7 = syntergosternite 7; t8 = tergite 8.
FIGURE 4 in Unusual sexually dimorphic head morphology in Lauxaniidae (Diptera: Lauxanioidea)-a new species of the genus Trivialia Malloch from Peru
FIGURE 4. Trivialia aitupa, sp. nov., holotype male, genitalia. A. Lateral view. B. Ventral view. C. Apicodorsal view. D. Dorsal view. E. Apical view. F. Apicoventral view. Measure bar = 0.1 mm. Abbreviations: bp = basiphallus; c = cercus; cp = central process; dp = distiphallus; e = epandrium; h = hypandrium; hk = hook of basiphallus; pg = postgonite; ss = surstylus; te = teeth of distiphallus.
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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.