Arthropod sensilla: Morphology and phylogenetic considerations

Hallberg, Eric; Hansson, Bill S.

doi:10.1002/(sici)1097-0029(19991215)47:6<428::aid-jemt6>3.0.co;2-p

Cited by 145 publications

(59 citation statements)

References 67 publications

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“…In sum, the differences between the tiny and large morphs of L. illecebrosa suggest a different autecology for larva and adult. Extant arthropods have small cuticular sensory setae called sensilla that receive mechanical or chemical input from the environment 19 . The morphology of such sensilla is very similar in all arthropods: they are usually slender, delicate and always arise in a socket 19 .…”

Section: Discussionmentioning

confidence: 99%

A 520 million-year-old chelicerate larva

Liu

Haug

et al. 2014

Nat Commun

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Section: Discussionmentioning

confidence: 99%

A 520 million-year-old chelicerate larva

Liu

Haug

et al. 2014

Nat Commun

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“…The olfactory sensilla of different arthropods show a high degree of similarity (Hallberg and Hannson 1999). This suggests that there may consequently be a degree of similarity in odour responses of different arthropod species.…”

Section: Olfaction and Electrophysiologymentioning

confidence: 99%

“…Wall-pore sensilla may be further divided, based on cuticular structure, into single-walled (including e.g. sensilla basiconica and trichodea) and double-walled sensilla (including sensilla coeloconica and grooved pegs) (Hallberg andHansson 1999, Keil 1999). The number of bipolar sensory neurons, in this case olfactory receptor neurons (ORNs) innervating a particular sensillum type varies from one to approximately fifty (Keil 1999).…”

Section: Morphology Of the Peripheral Olfactory Systemmentioning

confidence: 99%

Olfaction in vector-host interactions

Takken¹,

Knols²

2010

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“…In this putative worm-like ancestor, each segment must have possessed a protosensory organ that formed within the molecular environment common to all the segments. We expect, at least in arthropod evolution, that such a protosensory organ consisted of several scolopidia, neuronal units that constitute scolopophorous organs such as Johnston's organ and the chordotonal organ, because this structure is distributed widely among arthropod groups, and in adult insects, the scolopophorous sensory organs can be generated in every body segment 13,14 .…”

mentioning

confidence: 99%

A conserved developmental program for sensory organ formation in Drosophila melanogaster

2004

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Different sensory organs, such the eye and ear, are widely thought to have separate origins, guided by distinct organspecific factors that direct all aspects of their development. Previous studies of the D. melanogaster gene eyeless (ey) and its vertebrate homolog Pax6 suggested that this gene acts in such a manner and specifically drives eye development 1,2 . But diverse sensory organs might instead arise by segment-specific modification of a developmental program that is involved more generally in sensory organ formation. In D. melanogaster, a common proneural gene called atonal (ato) functions in the initial process of development of a number of segment-specific organs, including the compound eye, the auditory organ and the stretch receptor 3,4 , suggesting that these organs share an evolutionary origin. Here we show that D. melanogaster segment-specific sensory organs form through the integration of decapentaplegic (dpp), wingless (wg) and ecdysone signals into a single cis-regulatory element of ato. The induction of ectopic eyes by ey also depends on these signals for ato expression, and the ey mutant eye imaginal disc allows ato expression if cell death is blocked. These results imply that ey does not induce the entire eye morphogenetic program but rather modifies atodependent neuronal development. Our findings strongly suggest that various sensory organs evolved from an atodependent protosensory organ through segment specification by ey and Hox genes.If multiple segment-specific sensory organs have a common origin, they may share an intrasegmental environment for their formation. We therefore examined whether there are any similarities in the conditions necessary for the formation of three ato-dependent sensory organs in D. melanogaster: the compound eye, Johnston's organ (auditory organ) in the antenna and the chordotonal organ (stretch receptor) in the leg. Spatiotemporal conditions for sensory organ development have been studied most extensively in the D. melanogaster compound eye. Use of a neuron-specific 22C10 antibody also showed that the expression of Dad blocked neural differentiation in the chordotonal organ (arrowhead) of the leg disc (e).(f) ATO expression in leg discs of wild-type (top) and UAS-pan∆N/dpp-Gal4 larvae (bottom). Blocking the WG signal caused ectopic ATO expression in the ventral region of the disc (arrows).

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Arthropod sensilla: Morphology and phylogenetic considerations

Cited by 145 publications

References 67 publications

A 520 million-year-old chelicerate larva

A 520 million-year-old chelicerate larva

Olfaction in vector-host interactions

A conserved developmental program for sensory organ formation in Drosophila melanogaster

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