The labium consisted of 2 labial palps with a sensillum
styloconicum at the apex, a sensillum
chaeticum in the center (Fig.
Although the type 1 sensillum
morphotype is confined to the medial flagellum and is present in a very low number (18-20), it appears, in size and distribution, to be unique to P.
This infraorder represents a monophyletic taxon, which is supported by one syn(apomorphy) character (27-1; absence of the elongated plate sensillum
Ultrastructure and physiology of the C[O.sub.2] sensillum
ampullaceum in the leaf-cutting ant Atta sexdens.
18) with scape 3.0-3.4x as long as wide, with cross-ridges, a little shorter than clava; pedicel much longer than F1 (the shortest funicle segment); F2, F6, and often F4 the longest funicle segments (F6 sometimes slightly longer than F2 and F4), F3 and F5 slightly shorter (F5 sometimes almost as long as F4); F1-F3 and F5 without longitudinal sensilla, F4 with 1 longitudinal sensillum
, and F6 with 2 such sensilla; clava 2.7-2.8x as long as wide (in lateral view), with 5 longitudinal sensilla.
While the B event appears to be separate from A1 and A2, this does not preclude the possibility that it could result from the coupling of at least two other events within the peg sensillum
. Alternatively, it could be a summation of two active conductances within the same cell.
albopictus two coeloconic sensillum
are protruding from the tip of distal flagellum as a tubular structure measuring 10.38 [+ or -] 0.3 [micro]m with a diameter of 1 [micro]m opening to the exterior (Fig.
Pores scattered on dorsal and ventral surfaces of abdomen, but only one short, sensillum
observed dorsally on a male's abdomen.
Figure abbreviations: ac--acrotergite; as--antecostal suture (ridge); br--transverse row of placoid sensilla on epipharynx; c--claw; cs--campaniform sensillum
; dst--distal epipharyengal sensilla; dmr--dorsomesal row of setae on lacinia; er--epipharyngeal rods; f--femur; gl--galea; l--lacinia; lp--labial palp(i); mp--mesal pair of labro--epipharyngeal setae; msr--mesal row of setae on lacinia; mxp--maxillary palp(i); p2--2nd pair of labro-epipharyngeal setae; pr--pretarsus; pls--placoid sensilla; prst--prostheca; s--sensorium (accessory sensory papillae); sbp--subproximal epipharyngeal sensilla; st--stipes; t--tibia; tr--trochanter.
Targeted mutation of a Drosophila odor receptor defines receptor requirement in a novel class of sensillum
5), PD, 3-5; trochanter, one small sensillum
on the venter of lTr and one on the anterior face 2Tr of some specimens; femoral series, D, 4-5, AV+ADi.
Diagnosis: Antennal article VI with three sensilla basiconica, and diameter of the sensilla constant up to the attenuated apex, while the anterior sensillum
is slightly shorter than the others.