The antennal thermoreceptor of the camel cricket, Tachycines asynamorus

Nishikawa, Masao; Yokohari, Fumio; Ishibashi, Takaaki

doi:10.1016/0022-1910(85)90107-6

Cited by 28 publications

(9 citation statements)

References 17 publications

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“…The coelocapitular sensilla are most densely distributed on the first flagellar segments in Camponotus members. Crickets also have the coeloconic type of hygro-and thermoreceptive sensilla distributed around the circumference of the flagellum (Itoh et al 1984;Nishikawa et al 1985). In all these insects, therefore, the sensilla seem to have biased distributions that are speciesspecific.…”

Section: Characteristic Distribution Patterns Of Flagellar Sensillamentioning

confidence: 98%

Sex-specific antennal sensory system in the ant Camponotus japonicus: structure and distribution of sensilla on the flagellum

et al. 2009

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The antennae are a critically important component of the ant's highly elaborated chemical communication systems. However, our understanding of the organization of the sensory systems on the antennae of ants, from peripheral receptors to central and output systems, is poorly understood. Consequently, we have used scanning electron and confocal laser microscopy to create virtually complete maps of the structure, numbers of sensory neurons, and distribution patterns of all types of external sensilla on the antennal flagellum of all types of colony members of the carpenter ant Camponotus japonicus. Based on the outer cuticular structures, the sensilla have been classified into seven types: coelocapitular, coeloconic, ampullaceal, basiconic, trichoid-I, trichoid-II, and chaetic sensilla. Retrograde staining of antennal nerves has enabled us to count the number of sensory neurons housed in the different types of sensilla: three in a coelocapitular sensillum, three in a coeloconic sensillum, one in an ampullaceal sensillum, over 130 in a basiconic sensillum, 50-60 in a trichoid-I sensillum, and 8-9 in a trichoid-II sensillum. The basiconic sensilla, which are cuticular hydrocarbon-receptive in the ant, are present in workers and unmated queens but absent in males. Coelocapitular sensilla (putatively hygro- and thermoreceptive) have been newly identified in this study. Coelocapitular, coeloconic, and ampullaceal sensilla form clusters and show biased distributions on flagellar segments of antennae in all colony members. The total numbers of sensilla per flagellum are about 9000 in unmated queens, 7500 in workers, and 6000 in males. This is the first report presenting comprehensive sensillar maps of antennae in ants.

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Section: Characteristic Distribution Patterns Of Flagellar Sensillamentioning

confidence: 98%

Sex-specific antennal sensory system in the ant Camponotus japonicus: structure and distribution of sensilla on the flagellum

et al. 2009

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“…Butterflies, however, possess thermoreceptors in the wings as well as the antennae (Schmitz & Wasserthal, ), and the kissing bug Rhodnius prolixus , considered the most thermosensitive insect, possesses thermoreceptors in the rostrum, tarsi, tibial pads and genitalia (Zermoglio et al ., ). In the camel cricket Tachycines asynamorus , temperature is sensed by flagellar segments distributed laterally to the body axis and which are most active and sensitive at this species' preferred ambient temperature (Nishikawa, Yokohari & Ishibashi, ).…”

Section: Insect Physiological Responses To Heatmentioning

confidence: 99%

Insect responses to heat: physiological mechanisms, evolution and ecological implications in a warming world

et al. 2020

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Surviving changing climate conditions is particularly difficult for organisms such as insects that depend on environmental temperature to regulate their physiological functions. Insects are extremely threatened by global warming, since many do not have enough physiological tolerance even to survive continuous exposure to the current maximum temperatures experienced in their habitats. Here, we review literature on the physiological mechanisms that regulate responses to heat and provide heat tolerance in insects: (i) neuronal mechanisms to detect and respond to heat; (ii) metabolic responses to heat; (iii) thermoregulation; (iv) stress responses to tolerate heat; and (v) hormones that coordinate developmental and behavioural responses at warm temperatures. Our review shows that, apart from the stress response mediated by heat shock proteins, the physiological mechanisms of heat tolerance in insects remain poorly studied. Based on life-history theory, we discuss the costs of heat tolerance and the potential evolutionary mechanisms driving insect adaptations to high temperatures. Some insects may deal with ongoing global warming by the joint action of phenotypic plasticity and genetic adaptation. Plastic responses are limited and may not be by themselves enough to withstand ongoing warming trends. Although the evidence is still scarce and deserves further research in different insect taxa, genetic adaptation to high temperatures may result from rapid evolution. Finally, we emphasize the importance of incorporating physiological information for modelling species distributions and ecological interactions under global warming scenarios. This review identifies several open questions to improve our understanding of how insects respond physiologically to heat and the evolutionary and ecological consequences of those responses. Further lines of research are suggested at the species, order and class levels, with experimental and analytical approaches such as artificial selection, quantitative genetics and comparative analyses.

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“…A. sexdens . Compared to the abundance of hair sensilla, S. coeloconica have been found in low numbers on the antenna of ants and other insects as well (Dumpert, 1972;Tominaga and Yokohari, 1982;Itoh et al, 1984;Nishikawa et al, 1985;Hashimoto, 1990;Iwasaki et al, 1995;Renthal et al, 2003).…”

Section: Morphology (Sem)mentioning

confidence: 99%

The thermo-sensitive sensilla coeloconica of leaf-cutting ants (Atta vollenweideri)

Ruchty¹,

Romani²,

Kuebler³

et al. 2009

Arthropod Structure & Development

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Social insects show a variety of temperature-guided behaviors. Depending on whether heat reaches the sensillum via air movements (convective heat) or as radiant heat, specific adaptations of thermo-sensitive sensilla are expected. In the present study the morphology and the physiology of thermo-sensitive peg-in-pit sensilla (S. coeloconica) of the leaf-cutting ant Atta vollenweideri were investigated. S. coeloconica are located predominantly in a single cluster on the apical antennomere, and connect to the outside through a small aperture. The sensory peg is double-walled, embedded in a chamber and innervated by three unbranched dendrites. Using tungsten electrodes, activity of the sensory neurons was measured. In most cases, the neuron with the largest spike amplitude responds to changes in air temperature (convective heat) as well as to radiant heat. In response to a drop in air temperature, the neuron shows a phasic-tonic response followed by a complete adaptation within 1 min (cold-sensitive neuron). Based on their morphology and physiology, it is suggested that the S. coeloconica are involved in the recently described thermal orientation behavior of A. vollenweideri leaf-cutting ants.

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The antennal thermoreceptor of the camel cricket, Tachycines asynamorus

Cited by 28 publications

References 17 publications

Sex-specific antennal sensory system in the ant Camponotus japonicus: structure and distribution of sensilla on the flagellum

Sex-specific antennal sensory system in the ant Camponotus japonicus: structure and distribution of sensilla on the flagellum

Insect responses to heat: physiological mechanisms, evolution and ecological implications in a warming world

The thermo-sensitive sensilla coeloconica of leaf-cutting ants (Atta vollenweideri)

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