chaetotaxy


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chaetotaxy

the manner in which bristles and chaetae are arranged in insects - often used in keys for identification.
References in periodicals archive ?
Both genera share the fusion of all lateral tubercles on the head into a single mass, fusion of tubercles Di and De on head, reduction of the chaetotaxy of tubercles Di, De and Oc on the head, and presence of cryptopygy.
Chaetotaxy of pedal coxae: I: 5-6, II: 7, III: 14, IV: 21-24.
Chaetotaxy of leg I: femur, seven (six) dorsal, occasionally macrosetae missing on the median dorsoprolateral position, four located on the distal end; tibia, seven ventral in two pairs, one single, and one distal pair; metatarsus, one dorsal on distal end, six ventral in three pairs (Fig.
Other characters, including morphology of the venter and dorsum, varied kinds of sexual dimorphism in the walking legs of the males, chaetotaxy of legs, and morphology of pedipalps, legs and tarsal claws, indicate that six distinctive groups have developed to an extent that named taxa should be erected.
Chaetotaxy of larval Histeridae (Coleoptera: Hydrophiloidea) based on a description of Onthophilus nodatus LeConte.
Segments 1-5 strongly sclerotized dorsally, anterotransverse carinae distinct, each prescutum with an additional anterior carina, numerous small sensilla with four longer hair-like sensilla, spiracles near each anterolateral tergal margin; AB6 strongly sclerotized dorsally, laterally, and ventrolateral; ventral membranous area narrow, spiracles opening laterally at or near the dorso-pleural line distant from obscure lateral margin of turgum, carinae and chaetotaxy as on segments 1-5; segment 7 completely sclerotized.
Shape, ornamentation and chaetotaxy of dorsal parts as in female.
The homology of the chaetotaxy if inmature mosquitoes and a revised nomenclature for the chaetotaxy of the pupae.
Characters of external morphology and chaetotaxy were privileged, mainly those showing little or null variation within the taxa and also visible at common magnifications.
Bacillometroides does exhibit a plesiomorphic state for Andersen's Character 3 (body hairs fine and setiform) that does not conform to the typical ground plan for the Hydrometrinae, but it is most parsimonious to conclude that this aspect of chaetotaxy has undergone a reversal of character state.