TITLE

A chaetotaxy for cephalic sensilla in larval Simuliidae (Diptera)

AUTHOR(S)
Craig, Douglas A.
PUB. DATE
February 2005
SOURCE
Canadian Journal of Zoology;Feb2005, Vol. 83 Issue 2, p344
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
To develop a chaetotaxy for heads of larval Simuliidae (Diptera: Culicomorpha), position of head sensilla relative to other structures, plus sensillar innervation, were used to establish homologies with head sensilla of larval mosquitoes (Culicidae). Cleared whole mounts of first- and later-instar larval simuliids were examined using light microscopy. Histological sections were used to determine innervation, as was in vivo methylene blue staining. First-instar larval simuliids have 18 primary sensillar pairs that allow homologies with sensilla of later-instar larval culicids to be established. These homologies can be tracked in later-instar larval simuliids even though numerous secondary sensilla are present and positions of primary sensilla change. Homologies could not be determined for antennal sensilla of larval simuliids. Innervation of cephalic sensilla from the brain is in agreement with embryological origin of the various head regions. Innervation patterns of cephalic sensilla appear conserved in culicomorphs and it is proposed that, when possible, sensillar innervation be used to establish chaetotaxies.
ACCESSION #
17186801

 

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