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In arthropod morphology, hamuli are hooklets, usually in the form of projections of the surface of the exoskeleton. Hami might be actual evaginations of the whole thickness of the exoskeleton. The best-known examples are probably the row of hamuli on the anterior edge of the metathoracic (rear) wings of Hymenoptera such as the
The hamate is found within the distal row of carpal bones, and abuts the metacarpals of the little finger and ring finger. [4]: 708–709 Adjacent to the hamate on the ulnar side, and slightly above it, is the pisiform bone. Adjacent on the radial side is the capitate, and proximal is the lunate bone. [4]: 708–709
The most common coupling mechanism (e.g., Hymenoptera and Trichoptera) is a row of small hooks on the forward margin of the hindwing, or "hamuli", which lock onto the forewing, keeping them held together (hamulate coupling).
Also defined: proximal barbules; distal barbules; barbicels; hooklets (hamuli); pennulum; teeth. Just as barbs branch off on parallel sides of the rachis, the barbs in turn have a set of structures called barbules, branching from each side of the ramus. The base cells of the barbule form a plate from which a thinner stalk projects called the ...
The forward margin of the hind wing bears a number of hooked bristles, or "hamuli", which lock onto the fore wing, keeping them held together. The smaller species may have only two or three hamuli on each side, but the largest wasps may have a considerable number, keeping the wings gripped together especially tightly.
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