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392 results for “mayflies”
Fig. 8 in Re-description and range extension of the Afrotropical mayfly Cloeon perkinsi (Ephemeroptera, Baetidae)
Fig. 8. Cloeon perkinsi, ♀ abdominal terga II–V. Arrows presenting two different methods of counting the lines. Left: counting only the dark stripes (three stripes in total). Right: counting dark and bright stripes, including darker borders of stripes (seven dark lines in total).
Fig. 4 in Re-description and range extension of the Afrotropical mayfly Cloeon perkinsi (Ephemeroptera, Baetidae)
Fig. 4. Cloeon perkinsi, nymph. Habitus. Specimen collected in Hula swamp, Israel. Scale bar = 5 mm.
Some Notable Records of Mayflies (Insecta: Ephemeroptera) from Big Rivers in Indiana: Supporting Data
<p>Significant records from July & August 2019 fieldwork on big rivers in Indiana, United States.</p>
Figures 22–29 in Marmenuera, a new genus of leptophlebiid mayfly (Insecta: Ephemeroptera) endemic to Tasmania.
Figures 22–29. Marmenuera ida. Male imago: 22, abdomen, dorsal; 23, abdomen, ventral; 24, penes, dorsal; 25, penes, ventral. Nymph: 26, abdomen, dorsal; 27, labrum; 28, forefemur; 29, foretarsus.
Figures 1–4 in Marmenuera, a new genus of leptophlebiid mayfly (Insecta: Ephemeroptera) endemic to Tasmania.
Figures 1–4. Marmenuera tillyardi. Male imago: 1, forewing; 2, hind wing. Female imago: 3, forewing; 4, hind wing.
Figures 17–21 in Marmenuera, a new genus of leptophlebiid mayfly (Insecta: Ephemeroptera) endemic to Tasmania.
Figures 17–21. Marmenuera ida. Male imago: 17, forewing; 18, hindwing. Female imago: 19, forewing; 20, hindwing; 21, forewing, holotype.
Fig. 5. Baetis flaveola F.-J. Pictet, 1843 in Mayfly types and additional material (Insecta: Ephemeroptera) examined by F.-J. Pictet and A.-E. Pictet, housed in the Museums of Natural History of Geneva and Vienna
Fig. 5. Baetis flaveola F.-J. Pictet, 1843 nom. dub. (A) Syntype [?]. (B) Labels of syntype [?] 1. Scale bar: 5 mm. (C) Syntype [?] 2. Scale bar: 5 mm. (D) Labels of syntype [?] 2. Scale bar: 5 mm.
Fig. 1 in Mayfly types and additional material (Insecta: Ephemeroptera) examined by F.-J. Pictet and A.-E. Pictet, housed in the Museums of Natural History of Geneva and Vienna
Fig. 1. François-Jules Pictet de la Rive (1809-1872) in his library. Oil painting, without date or signature; attributed to a Mr Kaiser (according to an inscription on the back of the painting). Courtesy of the Fondation des Archives de la Famille Pictet, Geneva.
Spectral sensitivity transition in the compound eyes of a twilight-swarming mayfly and its visual ecological implications
<p>Aquatic insect species that leave the water after larval development, such as mayflies, have to deal with extremely different visual environments in their different life stages. Measuring the spectral sensitivity of the compound eyes of the virgin mayfly (Ephoron virgo) resulted in differences between the sensitivity of adults and larvae. Larvae were primarily green-, while adults were mostly UV-sensitive. The sensitivity of adults and larvae were the same in the UV, but in the green spectral range, adults were 3.3 times less sensitive than larvae. Transmittance spectrum measurements of larval skins covering the eye showed that the removal of exuvium during emergence cannot explain the spectral sensitivity change of the eyes. Taking numerous sky spectra from the literature, the ratio of UV and green photons in the skylight was shown to be maximal for θ ≈ − 13° solar elevation, which is in the θmax = -14.7° and θmin = -7.1° typical range of swarming that was established from webcam images of real swarmings. We suggest that spectral sensitivity of both the larval and adult eyes are adapted to the optical environment of the corresponding life stages.</p>
Data from: What ecological factors favor parthenogenesis over sexual reproduction? A study on the facultatively parthenogenetic mayfly Alainites muticus in natural populations
<p>Different reproductive modes are characterized by costs and benefits which depend on ecological contexts. For example, sex can provide benefits under complex biotic interactions, while its costs increase under mate limitation. Furthermore, ecological contexts often vary along abiotic gradients. Here, we study how these factors simultaneously influence the frequency of sex in the facultatively parthenogenetic mayfly Alainites muticus . We first verified that parthenogenesis translates into female-biased population sex ratios. We then measured the density of individuals (a proxy for mate limitation) and community diversity (biotic interaction complexity) for 159 A. muticus populations covering a broad altitudinal gradient and used structural equation modeling to investigate their direct and indirect influences on sex ratios. We found no effect of community diversity or altitude on sex ratios. Furthermore, even when females can reproduce parthenogenetically, they generally reproduce sexually, indicating that the benefits of sex exceed its costs in most situations. Sex ratios only become female-biased under low population densities, as expected if mate limitation was the main factor selecting for parthenogenesis. Mate limitation might be widespread in mayflies because of their short adult lifespan and limited dispersal, which can generate strong selection for reproductive assurance and may provide a stepping-stone towards obligate parthenogenesis.</p>
Figs 35–47 in Descriptions of new species and a new genus of leptophlebiid mayflies (Insecta: Ephemeroptera) from the Northern Territory, Australia
Figs 35–47 Tillyardophlebia dostinei Male imago: 35, forewing and outline of hind-wing; 36, hind-wing enlarged; 37, abdominal terga, dorsal; 38, abdominal segments 4–6, lateral; 39, foretarsal claws; 40, genitalia, ventral; 41, penes lobes, dorsal; 42, penes lobes, ventral; 43, penes lobes, lateral. Female imago: 44, sternum, abdominal segment IX. Nymph: 45, labrum; 46, foretibia and foretarsus; 47, gill, abdominal segment IV
Figs 24–34 in Descriptions of new species and a new genus of leptophlebiid mayflies (Insecta: Ephemeroptera) from the Northern Territory, Australia
Figs 24–34 Manggabora wapitja Nymph: 24, nymph; 25, labrum; 26, left mandible, dorsal; 27, right mandible, dorsal; 28, left maxilla, ventral; 29, labium, dorsal (left of midline) and ventral (right of midline); 30, foreleg; 31, foretarsal claw; 32, gill, abdominal segment IV; 33, spines, posterior margin of abdominal tergum V; 34, terminal filament, midlength.
Figs 14–23 in Descriptions of new species and a new genus of leptophlebiid mayflies (Insecta: Ephemeroptera) from the Northern Territory, Australia
Figs 14–23 Manggabora wapitja Male imago: 14, forewing and outline of hind-wing; 15, hind-wing enlarged; 16, foretarsal claws; 17, abdominal terga, dorsal; 18, abdominal segments 3–5, lateral; 19, genitalia, ventral; 20, penes lobes, ventral; 21, genitalia, lateral; 22, penes lobes, apical. Female imago: 23, sternum, abdominal segment IX.
Figs 1–13 in Descriptions of new species and a new genus of leptophlebiid mayflies (Insecta: Ephemeroptera) from the Northern Territory, Australia
Figs 1–13. Atalophlebia gubara. Male imago: 1, forewing and outline of hind-wing; 2, hind-wing enlarged; 3, foretarsal claws; 4, abdominal terga, dorsal; 5, penes lobes, ventral; 6, penes lobes, lateral; 7, penes lobes, apical; 8, penes lobes, ventral pockets (cleared slide preparation, spine-like setae internal). Female imago: 9, sternum, abdominal segment IX. Nymph: 10, labrum; 11, foretarsus; 12, lateral margin, abdominal segment V; 13, gill, abdominal segment IV.
Figure 4 in Redescription of adults, nymphs and taxonomic notes on the Southern Brazilian mayfly Ulmeritus saopaulensis (Traver, 1946) (Ephemeroptera: Leptophlebiidae)
Figure 4. Ulmeritus saopaulensis (Traver, 1946): mandibles of nymph: (A–D) left mandible in dorsal view; (E–H) right mandible in ventral view; (B) incisors; (C) prostheca; (D) molar; (F) incisors and prostheca; (G–H) molar. Abbreviations: i1 = outer incisor; i2 = inner incisor; m = molar; prs = prostheca. Photos A–H by VAS.
Figure 1 in Redescription of adults, nymphs and taxonomic notes on the Southern Brazilian mayfly Ulmeritus saopaulensis (Traver, 1946) (Ephemeroptera: Leptophlebiidae)
Figure 1. Habitus of Ulmeritus saopaulensis (Traver, 1946): (A–B) nymph, alive (A) and fixed in ethanol (B); (C) subimago male; (D) imago female; (E) imago male. Photos A, C–E by FFS; B by VAS.
Figure 3 in Redescription of adults, nymphs and taxonomic notes on the Southern Brazilian mayfly Ulmeritus saopaulensis (Traver, 1946) (Ephemeroptera: Leptophlebiidae)
Figure 3. Ulmeritus saopaulensis (Traver, 1946): Mouth parts of nymph. (A) labrum in dorsal view; (B) distal emargination of labrum in detail; (C) row of setae on the dorsal surface in detail; (D) hypopharynx in dorsal view (E) apex of superlingua in detail; (F) left maxilla dorsal view; (G) pectinate setae of maxilla; (H) distal part of labrum with dentisetae; (I) labium in dorsal view; (J) apex of glossas and paraglossas of labium; (K) apex of labium showing the labial palp. Abbreviations: ds = dentisetae. Photos A–K by VAS.
Figure 2 in Redescription of adults, nymphs and taxonomic notes on the Southern Brazilian mayfly Ulmeritus saopaulensis (Traver, 1946) (Ephemeroptera: Leptophlebiidae)
Figure 2. Imago male of Ulmeritus saopaulensis (Traver, 1946): (A–B) head and thorax in dorsal (A) and lateral (B) views; (C) fore wing; (D) right hind wing; I left hind wing; (F–H) legs in lateral view, (F) fore-, (G) mid-, and (H) hind leg; (I) genitalia in dorsal view; (J) penes in dorsal view. Photos A–E, I–J by FFS; F–H by VAS.
Fig. 2 in An estimate of the potential number of mayfly species (Ephemeroptera, Insecta) still to be described in Brazil
Fig. 2. Simple linear regression between the number of ephemeropteran species described based on male/female specimens and the year the description was published.
Fig. 1 in An estimate of the potential number of mayfly species (Ephemeroptera, Insecta) still to be described in Brazil
Fig. 1. Simple linear regression between the number of ephemeropteran species described based on specimens of the nymphs and/or imagoes and the year the description was published.
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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.