Development of the hair mechanosensilla on the pupal
labial palp of the butterfly, Pieris rapae L.
Enlarged
labial palp (left) showing sensillum chaeticum (C) and sensillum styloconicum (S); and enlarged apical maxillary palp (right) showing apical sensilla basiconica (A1, A2, A3), medial sensilla basiconica (M1, M2, M3), and lateral sensilla basiconica (L1, L2).
LABIAL PALP: Sorts and transfers food from the gills to the digestive tract
aegypti (12,16,18,20), on the sensory structures present in the antenna, maxillary palp,
labial palp, tarsi and ovipositor; whereas information on the studies of sensillary systems in the Asian tiger mosquito, Ae.
The following set of larval characters are described and illustrated: morphology of antenna, epipharynx, mandibles, maxilla, ligula with
labial palp, hastisetae, spicisetae, legs, abdominal terga, and condition of antecostal suture.
The anatomy of the
labial palp folds (Figure 7b) revealed two different canals on their folded faces: one with an acceptance current and the other with a rejection current.
(17) Proximal setae of
labial palp. (18) Labial and postlabial setae, all elements are coarsely ciliate.
2B), a small sensillum near the origin of a large claw-like galea; maxillary palp with small sensillum near origin of 1st segment (0.06-0.08 mm, x = 0.07 mm), 2nd segment (0.09-0.12 mm, x = 0.11 mm) with 2 distal hair-like sensilla, 3rd segment (0.11-0.13 mm, x = 0.12 mm); with a hair-like sencillium medially; labium sub-rectangular with two small sensilla ventromedially and six peg-like spines dorsodistally, two hair-like sensilla ventrodistally near the base of each palp;
labial palp with small sensillum near origin of 1st segment (0.04-0.07 mm, x = 0.05 mm), 2nd segment (0.07-0.09 mm, x = 0.08 mm) with prominent sensillum.
However, at low magnification while using a dissecting microscope, the
labial palp epithelium appeared uniform enough to assess the percent cover of red debris on the whole organ (Fig.
Rather than proceeding anteriorly in the superficial groove, the mucous clumps from the dorsal tract continue moving in a ventral direction, entering between the
labial palp lamellae.