title: Antenna morphology and sensilla ultrastructure of Tetrigus lewisi Candèze (Coleoptera: Elateridae).
abstract: We used scanning and transmission electron microscopy to study the typology, morphology, distributions, and ultrastructures of the antennal sensilla of Tetrigus lewisi Candèze, a predatory click beetle that feeds on longhorned beetles, such as, Monochamus alternatus (Coleoptera: Cerambycidae). We observed eight types of sensilla on the antennae, including sensilla chaetica (with three subtypes: ch.1, ch.2, ch.3), sensilla basiconica (subtypes: ba.1, ba.2, ba.3), sensilla trichodea (subtypes: tr.1, tr.2), as well as sensilla auricillica, sensilla coeloconica, sensilla campaniformia, sensilla styloconica and Böhm's bristles. Significant sexual dimorphism was found in the antenna morphology, as well as in the density of type 2 sensilla trichodea and type 1 sensilla basiconica. We observed thick cuticular walls on sensilla chaetica, sensilla trichodea and sensilla campaniformia; clear pore structures on sensilla trichodea, sensilla basiconica and sensilla auricillica; and double walls with spoke-channels on sensilla coeloconica. The chemoreception, mechanoreception and thermo-/hygro-reception functions were deduced from fine structures on the cuticular walls and the dendrites of the different sensilla types. We suggest that all these sensilla have important roles in the host location, mating and predatory behavior of T. lewisi.
authors.affiliation: The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Key Laboratory of Forest Pest Control, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Ren
authors.affiliation: The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Key Laboratory of Forest Pest Control, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.affiliation: The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Key Laboratory of Forest Pest Control, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Juan
authors.initials: J
authors.lastname: Shi
authors.affiliation: The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Key Laboratory of Forest Pest Control, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Lu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Key Laboratory of Forest Pest Control, Beijing Forestry University, Beijing 100083, PR China. Electronic address: youqingluo@126.com.
authors.forename: You-Qing
authors.initials: YQ
authors.lastname: Luo
mesh_terms: D000818:Animals; D057506:Arthropod Antennae / Q000648:ultrastructure*; D001517:Coleoptera / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D058618:Sensilla / Q000648:ultrastructure*
keywords: Antenna morphology; Scanning electron microscopy; Sensilla ultrastructure; Tetrigus lewisi Candèze; Transmission electron microscopy