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One of a pair of elongated, often segmented appendages usually found near the mouth in invertebrate organisms such as mollusks, crustaceans, and insects, the functions of which include sensation, locomotion, and feeding. Also called palpus.

[French palpe, from New Latin palpus, from Latin, a touching; see pāl- in Indo-European roots.]

pal′pal (păl′pəl) adj.


(pælp) or


n, pl palps or palpi (ˈpælpaɪ)
1. (Zoology) either of a pair of sensory appendages that arise from the mouthparts of crustaceans and insects
2. (Zoology) either of a pair of tactile organs arising from the head or anterior end of certain annelids and molluscs
[C19: from French, from Latin palpus a touching]
ˈpalpal adj


(ˈpæl pəs)

n., pl. -pi (-pī).
an appendage attached to an oral part and serving as an organ of sense in insects, crustaceans, etc.
[1805–15; < New Latin; Latin palpus or palpum palm of the hand]
palp′al, adj.


A segmented organ extending from the mouthparts of arthropods, used for touch or taste.
References in classic literature ?
I had been restless, dreaming most disagreeably that I was drowned, and that sea anemones were feeling over my face with their soft palps.
Alaus melanops LeConte, 1863, larva, 9, Antenna, dorsal; 10, antenna, ventral; 11, clypeus (= nasale), dorsal; 12, frons, dorsal; 13, mandible, dorsal; 14, hypopharyngeal complex, dorsal; 15, galea and lacinia, dorsal; 16, maxillary palp, dorsal; 17, maxillary palp, ventral; 18, labium, dorsal; 19, labium, ventral, Kadej et al.
Male palp dark brown; cymbium longer than wide, apically long, with two long spines - one on each apical and basal segment; embolus long and coiled, conductor spine like; tegulum with a pointed ridge in basal region; retrolateral tibial apophysis short, broad basally, pointed apically; ventral tibial apophysis rounded apically; femur with two short apicodorsal spines, two long dorsal spines; patella with two long dorsal spines, apical longer; tibia with three spines, dorsal and retrolateral long, prolateral short.
3 Palp with long embolus, winding once around tegulum, tip U-shaped (Fig.
The existence of possible chemosensory cells on the labial palps of Crassostrea virginica has been reported (Dwivedy, 1973), but the methodology and results of this study have been criticized (Beninger et al.
phoenicis in having a narrowly lanceolate dorsal seta on palp femorogenu (Fig.
Lyssomanes (completes with Chinoscopus and Sumakuru the genera included in the lyssomanines) can be distinguished from Chinoscopus by the third row of eyes that is much narrower than the fourth row, and from Sumakuru by the different disposition of sexual characters of the male palp and general somatic features (see details in Galvis 2017).
websteri showed variation in palp pigmentation pattern, the shape of the anterior edge of the prostomium, the shape of the major spines on chaetiger 5, and shape of the pygidium (Table III).
Mesocyclops oganmts female: (A)--General aspect; (B)--Antenna 2 (setae: longitudinal spines rows); (C)--Maxillulary palp (setae: rows of spines); (D)--Intercoxal sclerite of leg 4 (setae: projection); (E)--Genital segment (setae: lateral ami of the seminal receptacle); (F)- Caudal rami (setae: naked inner margin).
At this time, however, the presumptive palp cells do not abut on the Fgf9/16/20-expressing cells, and therefore these cells do not express ZicL.
T0 T2 Resgate (%) GR -- 100 (8/8) GRM -- 50 (4/8) Postura GR 0 1,7 [+ or -] 0,8A GRM 0 1 [+ or -] 1,2 Conforto GR 0 1,5 [+ or -] 0,9A GRM 0 1,7 [+ or -] 1,3A Atividade GR 0 2 [+ or -] 0,5A GRM 0 1,3 [+ or -] 0,5A Atitude GR 0 1,6 [+ or -] 0,7A GRM 0 1 [+ or -] 0,5A Miscelania GR 0 1,8 [+ or -] 1,1Aa GRM 0 0,7 [+ or -] 0,8b Palp.