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Stomodaeal valve ultrastructure in the sandfly Lutzomyia longipalpis (Diptera: Psychodidae)
Author(s) -
TANG YINSHAN,
WARD RICHARD D.
Publication year - 1998
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1046/j.1365-2915.1998.00069.x
Subject(s) - biology , sandfly , ultrastructure , psychodidae , lutzomyia , anatomy , zoology , parasite hosting , leishmania , leishmaniasis , immunology , world wide web , computer science
The stomodaeal valve and adjacent cardia region of the alimentary canal of the phlebotomine sandfly Lutzomyia longipalpis have been studied using electron microscopy. With the scanning electron microscope (SEM), numerous pit‐like structures of different sizes were found in the surface of the valve of male and female flies. Under the transmission electron microscope (TEM), the cells adjacent to the pores were shown to have numerous mitochondria and to lack neural innervation. It is suggested that the pit‐like structures are probably secretory. A typical basiconic sensilla was found on the inner side of the oesophagus at the junction with the stomodaeal valve, with at least one dendrite which extended to the tip, indicating a chemosensory role. It is likely that this type of sensilla may control the movement of the stomodaeal valve after contact with fluids entering the mid‐gut and may be responsible for diverting the sugar meal to the crop by closure of the valve.