labial palp

labial palp

[′lā·bē·əl ¦palp]
(invertebrate zoology)
Either of a pair of fleshy appendages on either side of the mouth of certain bivalve mollusks.
A jointed appendage attached to the labium of certain insects.
References in periodicals archive ?
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).
2[degrees]) (Table II); maxilla with obscure cardo bearing one prominent sensillum; stipes short, fingerlike, ventrolateral surface with two prominent sensilla, medial surface without sensilla; galea absent, maxillary palps, 1st with basal spinule and distal pore, 2nd with two prominent sensilla, 3rd with one prominent sensillum; labium, prementum small, trapezoidal, narrowest posteriorly, lateral margins distant from medial margins of maxillary stipes, three prominent distolateral hair-like sensilla near origin of each labial palp, two small basal spines, lateral spinules present; postlabium relatively short, broad based, separated from maxillary bases by two low but prominent protuberances, one small sensillum between each protuberance and stipes.
Distomedial projection of segment II of labial palp poorly developed (Fig.
8 as high as wide, finely punctate over entire surface; maxillary palp 5-segmented; labial palp 4-segmented; second and third maxillary palpomere flattened and broadened, distal two slender; mandible with upper tooth obliquely truncate, long, lower tooth short and stout (Figure 10), malar space 0.
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 resulting fluid (gill and labial palp mucus extract) was centrifuged at 400 X g for 15 min, filtered (0.
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.
01 mm) and secondarily segmented; labium rounded distally and protruding well beyond origins of palps, hair-like sensilla arising near base of each palp, small cone-like sensilla along distal rounded edge, ligula prominent with a shallow distal bifurcation with each short branch supporting a prominent sensillum, proximal segment of labial palp with lateral scale-like spinulae, first segment 0.
Promesonotal rugae reticulate and strong 4 4--Lower pronotal spine as long as upper teeth and sharp P naegeli 4'--Lower pronotal spine shorter than the upper spine and apically rounded P abdominalis 5--Maxillary palp with 5 segments, labial palp with 4 segments 6 5'--Maxillary palp with 4 segments, labial palp with 3 segments 8 6--Head and mesosoma yellow or reddish, never black.
We measured the extent of the discoloration by estimating the percentage of the surface area of the labial palp dorsal from the ventral margin that was discolored in 10% classes.
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.