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32 results for “eclosion”
FIGURES 23–28 in On Egg Eclosion and Larval Development in Euglossine Bees
FIGURES 23–28. Microphotographs of mature larvae of Euglossa (Euglossa) hemichlora. 23, 24. Right mandible, dorsal and inner views, respectively. 25. Anal area of cleared and stained predefecating larva with darkly stained integument above transverse anal slit above which is the pygidial ridge; dark area below slit is rectum seen through integument. Note short pigmented spines laterad of anal slit. 26. Spiracle of cleared predefecating larva seen from exterior, demonstrating width of peritreme relative to atrial opening. 27. Side view of spiracle of predefecating larva with its anatomical parts identified. 28. External view of spiracle of predefecating larva focused on unadorned primary tracheal opening; gray-toned ring immediately outside of opening caused by subatrium beneath transparent atrium.
FIGURES 15, 16 in On Egg Eclosion and Larval Development in Euglossine Bees
FIGURES 15, 16. SEM micrographs of egg of Euglossa (Euglossa) hemichlora. 15. Surface of chorion from side showing faint hexagonal patterning. 16. Presumed front end of egg revealing presumed opening through the vitelline membrane.
FIGURES 17–22 in On Egg Eclosion and Larval Development in Euglossine Bees
FIGURES 17–22. Diagrams of immature stages of Euglossa (Euglossa) hemichlora: figs. 18, 21, 22 to same scale. 17. Egg, presumed front end left. 18. Postdefecating larva, lateral view, anterior end left. 19, 20. Head of same, frontal and lateral views, respectively. 21. Late stage predefecating last larval instar, anterior end left. 22. Early stage of predefecating last larval instar, anterior end left.
FIGURES 11–14. Euglossine taxa not exhibiting elongate, necklike prothoracic segment. 11 in On Egg Eclosion and Larval Development in Euglossine Bees
FIGURES 11–14. Euglossine taxa not exhibiting elongate, necklike prothoracic segment. 11. Eulaema (Apeulaema) nigrita modified from Zucchi et al. (1969a: fig. 8) and 12, 13. Eufriesea surinamensis from Rozen (2016: figs. 6, 7) (both of which were identified as predefecating). 14. Exaerete smaragdina, identified as postdefecating in Garófalo and Rozen (2001: fig. 28), presumably was in an early stage that had not yet started to develop pupal tissue internally.
FIGURES 6–10 in On Egg Eclosion and Larval Development in Euglossine Bees
FIGURES 6–10. Euglossine taxa exhibiting elongate, necklike prothoracic segment and small cranium in Rozen (2016) for: 6, 7. Eufriesea surinamensis, 8. Eufriesea mussitans, 9. E. (Euglossa) cordata, 10. Eulaema (Apeulaema) polychroma.
FIGURES 3–5 in On Egg Eclosion and Larval Development in Euglossine Bees
FIGURES 3–5. Illustrations of sequence of immature stages of Euglossa (Glossura) intersecta Latreille reproduced from Zucchi et al. (1969b: figs. 3, 10, and 9, respectively), all to approximately same scale. 3. Postdefecating larva showing internal position of developing pharate pupa (dashed lines). 4. Prepupa. 5. Pupa, showing elongate mouthparts that form under the head and mesosoma of the prepupa.
FIGURE 1 in On Egg Eclosion and Larval Development in Euglossine Bees
FIGURE 1. Microphotographs of integument of body of cleared first instar of Eulaema (Apeulaema) nigrita (Lepeletier) showing two spiracles, associated trachea, and continuous band of fine spicules extending along one side of body just above spiracular line. Large structure circling each spiracle is large atrium of second instars forming around very small atrium or first instar. FIGURE 2. Close-up of one spiracle.
FIGURE 12–17 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURE 12–17. SEM micrographs of micropylar areas on other eggs of Bombus griseocollis showing variation in radiating channels and in apparent number of openings.
FIGURE 40 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURE 40. Microphotograph of cleared abdominal segment of fourth larval instar of Bombus griseocollis, anterior end right, with long, tapering, posteroventrad directed spicules of lower surface of lateral body swelling above and much smaller, denser ventral body spicules below.
FIGURES 34–36 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURES 34–36. Microphotographs of right mandible of fifth larval instar of Bombus griseocollis dorsal, inner, and ventral, and outer views, respectively (arrows pointing to setae in outer view).
FIGURES 23–25 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURES 23–25. Diagrams of fifth larval instars of Bombus griseocollis, lateral views, all to same scale. Scale = 1.0 mm, referring to figs. 23–25. Variation in body size reflecting natural variability in this stage. 23. Predefecating larva. 24. Early postdefecating larva with thoracic segmentation starting to elongate. 25. Late postdefecating larva with pupal metasoma starting to swell abdomen. Scale = 1.0 mm. FIGURES 26, 27. Close-up of head of fifth larval instar of B. griseocollis, lateral and front views respectively.
FIGURES 31–33 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURES 31–33. Microphotographs of front of head of Bombus griseocollis showing variation in clypeal pigmentation.
FIGURES 5–7 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURES 5–7. SEM micrographs of another egg of Bombus griseocollis. 5. Entire egg (anterior end left), again with micropyle centered in middle of front end. 6. Close-up of elevation. 7. Further close-up, demonstrating large number of possible openings.
FIGURES 8, 9 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURES 8, 9. Distant (arrow) and close-up views of the micropyle of yet another egg, this one revealing no certain opening. FIGURES 10. Front of egg of Bombus griseocollis that has lost its chorion, revealing small opening into yolk (arrow) in the vitelline membrane through which spermatozoa are presumably funneled to fertilize the egg. 11. Close-up of entrance.
FIGURES 2–4 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURES 2–4. SEM micrographs of egg of Bombus griseocollis. 2. Entire egg (anterior end up left) demonstrating smooth transparent chorion at short anterior and posterior ends and long stretch of reticulate, rough chorion in the middle. 3. Close-up of anterior end showing the small elevation of the micropyle located centrally. 4. Close-up of the micropyle elevation, with some micropylar opening visible along upper periphery.
FIGURES 18–22 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURES 18–22. SEM micrographs of reticulate chorion. 18. Close-up of exterior surface of reticulate chorion. 19. Same, except where reticulate chorion meets smooth chorions. 20. Edge of split of reticulate chorion with thin inner surface below and edge of outer structure along upper side. Note reticulate pattern of surface structure revealed through thin inner surface, 21. Close-up of central area in figure 20. 22. Close-up of parallel perpendicular lamellae from central area of figure 20 demonstrating complexity of outer ornamentation.
Linked collectors and determiners for: First observations on the life cycle and mass eclosion events in a mantis fly (Family Mantispidae) in the subfamily Drepanicinae.
Natural history specimen data linked to collectors and determiners held within, "First observations on the life cycle and mass eclosion events in a mantis fly (Family Mantispidae) in the subfamily Drepanicinae". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/07029e9e-48af-4335-a3cd-3130a372a562">https://bionomia.net/dataset/07029e9e-48af-4335-a3cd-3130a372a562</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/07029e9e-48af-4335-a3cd-3130a372a562">https://gbif.org/dataset/07029e9e-48af-4335-a3cd-3130a372a562</a>. Formatted as a Frictionless Data package.
FIGURES 30–32 in Developmental Biology among Corbiculate Bees: Bombus impatiens, Including Observations on Its Egg Eclosion
FIGURES 30–32. SEM micrographs of another hatching first instar of Bombus impatiens about halfway out of chorion, anterior end to right. 30. Rear of body showing disruption of chorion along spiracular line. 31. Close-up of destruction of inner layer of chorion along spiracular line identified by rectangle in figure 30. 32. Close-up of thorax and first abdominal segment demonstrating enlarged first thoracic spiracle compared with two following spiracles.
Data from: Responses of activity rhythms to temperature cues evolve in Drosophila populations selected for divergent timing of eclosion
Even though the rhythm in adult emergence and rhythm in locomotor activity are two different rhythmic phenomena that occur at distinct life-stages of the fly life cycle, previous studies have hinted at similarities in certain aspects of the organisation of the circadian clock driving these two rhythms. For instance, the period gene plays an important regulatory role in both rhythms. In an earlier study, we have shown that selection on timing of adult emergence behaviour in populations of Drosophila melanogaster leads to the co-evolution of temperature sensitivity of circadian clocks driving eclosion. In this study, we were interested in asking if temperature sensitivity of the locomotor activity rhythm has evolved in our populations with divergent timing of adult emergence rhythm, with the goal of understanding the extent of similarity (or lack of it) in circadian organisation between the two rhythms. We found that in response to simulated jetlag with temperature cycles, late chronotypes (populations selected for predominant emergence during dusk) indeed re-entrain faster than early chronotypes (populations selected for predominant emergence during dawn) to 6-h phase-delays, thereby indicating enhanced sensitivity of the activity/rest clock to temperature cues in these stocks (entrainment is the synchronisation of internal rhythms to cyclic environmental time-cues). Additionally, we found that late chronotypes show higher plasticity of phases across regimes, day-to-day stability in phases and amplitude of entrainment, all indicative of enhanced temperature sensitive activity/rest rhythms. Our results highlight remarkably similar organisation principles between emergence and activity/rest rhythms.
FIGURE 1 in Preliminary Study of the Bumble Bee Bombus griseocollis, Its Eggs, Their Eclosion, and Its Larval Instars and Pupae (Apoidea: Apidae: Bombini)
FIGURE 1. Microphotograph of egg of Bombus griseocollis, anterior end at right.
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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
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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.