Annuli Alae
Annuli Alae - Related Videos
06:19
In situ Protocol for Butterfly Pupal Wings Using Riboprobes
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Cited by 5 •
2007
In order to examine gene expression in the pupal wing tissue of Bicyclus anynana, we present an optimized protocol for in situ hybridizations using riboprobes. We also provide guidelines for the further optimization of this protocol for use in pupal wings of other Lepidopteran species.
07:59
Airfoil Behavior: Pressure Distribution over a Clark Y-14 Wing
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2023
Source: David Guo, College of Engineering, Technology, and Aeronautics (CETA), Southern New Hampshire University (SNHU), Manchester, New Hampshire An airfoil is a 2-dimensional wing section that represents critical wing performance characteristics. The pressure distribution and lift coefficient are important parameters that characterize the behavior of airfoils. The pressure distribution is directly related to the lift generated by airfoils. A Clark Y-14 airfoil, which is used in this...
09:18
Clark Y-14 Wing Performance: Deployment of High-lift Devices (Flaps and Slats)
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2023
Source: David Guo, College of Engineering, Technology, and Aeronautics (CETA), Southern New Hampshire University (SNHU), Manchester, New Hampshire A wing is the major lift-generating apparatus in an airplane. Wing performance can be further enhanced by deploying high-lift devices, such as flaps (at the trailing edge) and slats (at the leading edge) during takeoff or landing. In this experiment, a wind tunnel is utilized to generate certain airspeeds, and a Clark Y-14 wing with a flap and slat...
07:01
Flow Visualization in a Water Tunnel: Observing the Leading-edge Vortex Over a Delta Wing
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2023
Source: Jose Roberto Moreto, Gustaaf Jacobs and Xiaofeng Liu, Department of Aerospace Engineering, San Diego State University, San Diego, California The delta wing, shown in Figure 1D, is a popular design in high-speed airplanes due to its superb performance in transonic and supersonic flight regimes. This type of wing has a small aspect ratio and high sweep angle, which reduces drag at high subsonic, transonic and supersonic flight regimes. The aspect ratio is defined as the wing span divided...
15:59
Laser Microdissection Applied to Gene Expression Profiling of Subset of Cells from the Drosophila Wing Disc
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Cited by 10 •
2010
Laser microdissection was applied to analyse gene expression profiling in specific compartments of Drosophila wing disc subjected to localised RNAi in vivo. RNA extracted from equivalent areas of silenced and unsilenced compartments was analysed by quantitative RT-PCR to determine comparative gene expression profiling within the context of native tissue microecology.
FAQs
Variation in the number and spacing of annuli alae can help distinguish closely related species when overall body form is similar. Researchers treat these features as comparative characters rather than isolated identifiers, examining their arrangement alongside other anatomical traits. This approach supports more reliable taxonomic descriptions and can reveal consistent differences in external organization.
Patterned thickening or folding of the cuticle creates transverse annulations, and differences in that pattern affect the visible form of the structures. The resulting rings may vary in shape, spacing, or distribution along a wing-like extension. Recording these differences allows researchers to connect external architecture with broader comparisons of invertebrate body organization.
Annuli alae provide information about transverse ring patterns and their position on lateral alae or related extensions. Other cuticular characters may describe different aspects of external ornamentation, so researchers compare them rather than treating one feature as sufficient. Combining annulation patterns with body segmentation, appendage structure, and cuticular ornamentation strengthens morphological interpretation.
Microscopy studies should document the number, spacing, shape, and distribution of the annuli alae. Their location, including occurrence along lateral alae or other wing-like extensions, also provides important context. Recording these traits systematically gives researchers comparable observations for species descriptions, identification, and analysis of differences in external form.
Researchers compare annuli alae among specimens by assessing their number, spacing, shape, and distribution. Consistent differences in these characters can support separation of related species, especially when evaluated with segmentation, appendage structure, and other cuticular features. The method contributes to taxonomic identification by using a coordinated set of morphological evidence rather than a single observation.
Beyond identification, annuli alae contribute to comparative morphology and evolutionary analysis. Their patterns provide a way to compare external organization among invertebrates and examine how related forms differ in cuticular architecture. When interpreted with segmentation, appendage structure, and other ornamentation, these observations help place a particular feature within a broader biological comparison.