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The pretracheal layer of the deep cervical fascia passes in front of the carotid sheath (i.e., common carotid artery, internal jugular vein, and vagus nerve) and in front of the cervical viscera (larynx, oesophagus, and pharynx). The muscular layer ensheathes the infrahyoid muscles. Above, the pretracheal fascia is fixed to the hyoid bone.
The scales on butterfly wings are pigmented with melanins that can produce the colours black and brown. The white colour in the butterfly family Pieridae is a derivative of uric acid, an excretory product. [13] [40]: 84 Bright blues, greens, reds, and iridescence are usually created not by pigments but through the microstructure of the scales.
The buccopharyngeal fascia is a thin lamina given off from the pretracheal fascia. [citation needed] It is the portion of the pretracheal fascia situated posterior and lateral to the pharynx. It encloses the entire superior part of the alimentary canal. [3] The buccopharyngeal fascia envelops the superior pharyngeal constrictor muscles.
Siproeta epaphus, the rusty-tipped page or brown siproeta, [1] is a New World butterfly that lives all year in tropical habitats. It has large wings, averaging 7.0–7.5 cm (2.8–3.0 in), [1] that are black in the inner portion of the top surface and brown throughout the underside. Both surfaces have a bold white transverse stripe continuing ...
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The male is one of the most brilliantly glossy species and has only a quite inconsiderable black apical spot and a white costal patch on the forewing. The under surface is noteworthy for the contrast between the black basal area and a brown distal region, which are separated by a median band of a more or less pure white and of varying extent ...
Pratapa deva, the white royal, [1] [2] is a lycaenid or blue butterfly found in the Indomalayan realm. The species was first described by Frederic Moore in 1857. [ 1 ] [ 2 ] [ 3 ]
Upperside dark brown, paler in the female, with very obscure black markings of transverse lines across the cells of both forewings and hindwings and an oblique discal fascia on the forewing; an ash-grey continuous band along the termen of both forewings and hindwings, gradually broadening from the apex of the forewing, where it is very narrow, to the tornus of the hindwing, where it covers ...