From ZooTerms (Dictionary of Invertebrate Zoology)
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pecten (noun; plural pectines; Latin pecten, comb): 1. Any comb- or rake-like structure.

2. (Arthropoda: Chelicerata) In Scorpiones, one of a pair of appendages on the somite immediately behind the genital somite.

3. (Arthropoda: Insecta) a. In Culicidae, a Culicinae larvae, bearing a comblike row of spicules on the basal part of the siphon; in Anophelinae and Dixidae larvae, borne on the posterior margin of the pecten plate. b. In Apidae, the pollen rake. c. In genitalia, distally pointing rows of comblike teeth lining the articular membrane of the gonopophyses. d. In Diaspidinae, see gland spines.