title: Lehr's fields of campaniform sensilla in beetles (Coleoptera): functional morphology. II. Wing reduction and the sensory field.
abstract: Loss of the flight ability and wing reduction has been reported for many taxa of Coleoptera. If elytra are closed, their roots are clenched between the tergum and the pleuron, forces applied to the elytra can not be transmitted to the field of campaniform sensilla situated on the root. That is why it is plausible to assume that the field becomes redundant in non-flying beetles. We examined the relationships between the hind wing reduction and characters of this mechanosensory field in beetles of six families. We measured the size of the elytron, that of the hind wing and counted the number of sensilla in the sensory field. Mesopterous non-flying beetles retain one half to one third of sensilla present in macropterous species of the same body size. Further reduction of the sensory field in brachypterous species is obvious, but sensilla are still present in insects with strongly reduced wings, as long as their elytra are separable and mesothoracic axillaries are present. Complete loss of sensilla coincides with the existence of a permanent sutural lock. However, some beetles with permanently locked elytra and absence of axillaries still retain few campaniform sensilla. A very special case of an extreme wing modification in feather-wing beetles is considered. No sensilla were revealed either on the root of the elytron or on the basal segment of such fringed wings in flying ptiliid species.
authors.affiliation: Department of Ethology and Social Biology of Insects, Schmalhausen-Institute of Zoology, B. Chmielnicki Street 15, 01601 Kiev, Ukraine. Electronic address: leopup@izan.kiev.ua.
authors.forename: Leonid
authors.initials: L
authors.lastname: Frantsevich
authors.affiliation: Department of Functional Morphology and Biomechanics, Christian-Albrechts-University of Kiel, Am Botanischen Garten 1-9, D-24098 Kiel, Germany.
authors.forename: Stanislav
authors.initials: S
authors.lastname: Gorb
authors.affiliation: Institute for Evolutionary Ecology, Acad. Lebedev Street 37, 03143 Kiev, Ukraine.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Radchenko
authors.affiliation: Institute for Evolutionary Ecology, Acad. Lebedev Street 37, 03143 Kiev, Ukraine.
authors.forename: Dmytro
authors.initials: D
authors.lastname: Gladun
authors.affiliation: Department of Entomology, Biological Faculty, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119991 Moscow, Russia.
authors.forename: Alexey
authors.initials: A
authors.lastname: Polilov
authors.affiliation: Department of Scientific Fundamental Collection, Schmalhausen-Institute of Zoology, B. Chmielnicki Street 15, 01601 Kiev, Ukraine.
authors.forename: Lyubov
authors.initials: L
authors.lastname: Cherney
authors.affiliation: Department of Zoology, Dragomanov Pedagogical University, Pirogov Street 9, 01601 Kiev, Ukraine.
authors.forename: Vassily
authors.initials: V
authors.lastname: Browdy
authors.affiliation: Department of Zoology, Institute of Biology, National Shevchenko-University, Volodymirska Street, 64, 01601 Kiev, Ukraine.
authors.forename: Maxim
authors.initials: M
authors.lastname: Kovalev
mesh_terms: D000818:Animals; D001517:Coleoptera / Q000033:anatomy & histology* / Q000145:classification; D005426:Flight, Animal / Q000502:physiology; D058618:Sensilla / Q000033:anatomy & histology; D013045:Species Specificity; D014921:Wings, Animal / Q000033:anatomy & histology
keywords: Campaniform sensilla; Coleoptera; Elytra; Insect flight; Wing reduction