Morphological study of the labial sensilla in Nabidae (Hemiptera: Heteroptera: Cimicomorpha)

Abstract

The study presents new data on the morphology and distribution of the labial tip sensilla of six species of two nabid subfamilies-Protosteminae and Nabinae (Heteroptera: Cimicomorpha), which were obtained using a scanning electron microscope. In both taxa, there are five morphologically distinct types of sensilla on the tip of the labium: peg sensilla with a terminal pore, nonporous peg sensilla, elongated placoid sensilla with wall pores (multiporous), and trichoid sensilla. In addition, oval plate sensilla with a terminal pore (Tp-opls) were observed in the genus Himacerus. Campaniform sensilla and nonporous chaetic sensilla were observed on the surface of the last segment of the labium in all of the studied species. Over a dozen trichoid sensilla were scattered on the last segment of the labium only in the genus Prostemma. Based on their external structure, it is likely that these sensilla are chemosensitive and mechanosensitive. The oval plate sensilla with a Tp-opls (gustatory) in Himacerus (Nabinae) represent a morphological novelty that probably evolved independently of other nabids.

Unique Fine Morphology of Mouthparts in Haematoloecha nigrorufa (Stål) (Hemiptera: Reduviidae) Adapted to Millipede Feeding

“…However, slight differences may be observed among taxa, especially in the quantity and size of sensilla. The present morphological and functional classifications of the labial sensilla in H. nigrorufa are in accordance with the features described for the mentioned types and functions of sensilla reported by many authors [18,24,25,44,54,55,79].…”

“…On the labial tip in most heteropterans, there is usually a singule olfactory sensillum basiconicum and/or sensillum placodeum. These sensilla are arranged in a pattern that is highly stereotypical among most heteropterans [ 15 , 16 , 18 , 19 , 21 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 72 , 78 ].…”

“…The sensillar systems of heteropteran mouthparts have been studied in representatives across different trophic groups and different families often display specific characteristics under examination [ 15 , 16 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Although data on some aspects of mouthpart morphology of Heteroptera are abundant, based on light and scanning electron microscopy, previous observations have been reported at various levels of accuracy [ 12 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ].…”

Molecular phylogeny of Nabidae (Hemiptera: Heteroptera: Cimicomorpha): insight into relationships and reclassification with the proposal of the new tribe Stenonabini

“…E-mail: jung@cnu.ac.kr the group (Péricart, 1987;Kerzhner, 1996). Representatives of Prostemmatinae, which have relatively narrow ecological requirements and prefer xerothermic habitats (ground inhabiting), appear to prey exclusively on other Heteroptera, particularly the pentatomomorphan superfamily Lygaeoidea (Lattin, 1989;Kerzhner, 1996;Volpi & Coscarón, 2010;Taszakowski et al, 2019). The other subfamily, Nabinae, has a much broader range of preferences.…”

Revision and Phylogenetic Analysis of the Genus Phonoctonus Stål, 1853 (Heteroptera, Reduviidae, Harpactorinae)

“…For extensions on the posterior edge of the pronotum, the name of the posterior pronotal extensions was adopted. The terminology used for sensilla follows [41][42][43]. Documentation of the selected morphological characteristics used in the phylogenetic analysis was prepared using a Nikon SMZ25 stereoscopic microscope and photographed using a Nikon DS-Fi2 camera with NIS-Elements D 4.50.00 64-Bit.…”