retinaculum

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retinaculum

[‚ret·ən′ak·yə·ləm]
(invertebrate zoology)
A clasp on the forewing of certain moths for retaining the frenulum of the hindwing.
An appendage on the third abdominal somite of springtails that articulates with the furcula.
References in periodicals archive ?
The peroneal tendons, peroneus longus and brevis, run in a sheath posterior to the lateral malleolus coursing beneath the superior and inferior retinacula.