Putative Sensory Structures Associated With the Food Canal of Tabanus atratus (Diptera: Tabanidae)

Putative sensory structures in the food canal, and distal vestibule region entering the canal of Tabanus atratus F., are described. Two pairs of sensilla were observed in the walls of the vestibule—a distal pair of the basiconic type, and a pair of setifiorm sensilla at the base of the vestibule. Ve...

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Bibliographic Details
Published in:Journal of medical entomology 2017-03, Vol.54 (2), p.471-475
Main Author: Joy, James E.
Format: Article
Language:English
Subjects:
Animals
basiconic sensilla
Canals (anatomy)
Diptera - anatomy & histology
Diptera - physiology
Feeding Behavior
Female
Food
food canal
labrum
Sensilla
Sensilla - anatomy & histology
Sensilla - physiology
setiform sensilla
SHORT COMMUNICATION
Tabanus atratus
Vestibular system
Vestibules
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Description
Summary:Putative sensory structures in the food canal, and distal vestibule region entering the canal of Tabanus atratus F., are described. Two pairs of sensilla were observed in the walls of the vestibule—a distal pair of the basiconic type, and a pair of setifiorm sensilla at the base of the vestibule. Vestibular sensilla were constant in type, number, and position. Conversely, setiform sensilla in right and left walls of the food canal varied in number from one fly specimen to another, and lacked evidence of pairing (i.e., sensilla in one wall did not necessarily have a counterpart in the other wall). Food canal sensilla were of setiform design, with the exception of a single basiconic sensilla in each lateral wall of the food canal in every fly. When the food canal was partitioned into four equidistant regions, setiform sensilla were aggregated in the two distal-most regions, with relatively few sensilla observed in the two proximal canal regions. This aggregation was significant, leading to rejection of the null hypothesis that setiform sensilla were evenly distribution throughout the length of the food canal. Basiconic sensilla were always located in the distal-most region of the food canal.
ISSN:0022-2585
0022-2858
1938-2928
DOI:10.1093/jme/tjw162