Palpus

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palpus

[′pal·pəs]
(invertebrate zoology)
A process on a mouthpart of an arthropod that has a tactile or gustatory function.
Any similar process on other invertebrates.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Palpus

 

a segmented appendage of the jaws (mandibles and first and second maxillae) in crustaceans, myriapods, and insects, equipped with various sense organs (tactile organs and chemore-ceptors). The palpi are well developed and completely represented in crustaceans; in myriapods and insects there are no palpi on the mandibles. In many insects, especially those with a sucking-type mouth apparatus, the palpi are reduced.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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Shape: Head round, antennae slender without scales, gradually clavate but without a distinct club-shaped, eyes large, maxillary palpi well developed, slightly compressed, proboscis long and highly coiled; thorax, fore wings simple, terminal margins never dentate or caudate, hind wings with terminal margin never dentate, cell closed, with patches of modified scales around the cell; legs with tibia as long as the femur with long hairs, in females wide and club-shaped, with four segments, all firmly joined together; abdomen slender.
* Short conical palpi, II palpal segment projects laterally extending beyond the basis capituli, about twice as broad as long, eyes absent ................
Male adults with hairy antennae and club shaped palpi were separated from females.
Palpi, sensitive appendages attached to the oral part of a cockroach enabling it to pre-taste food
They also extend palpi for firm anchorage, the family physician explained.
The former species is characterized by hooked bristles on the labial palpi of the female lacking in the latter and by a mostly black female clypeus (lower part of the face) that is completely yellow colored in the other species.
RJoiningC beyond the wing apex; Rsclosertotheend of [R.sub.1] than to the arculus; palpi 3- or 4-segmented; antennae with binodal or gynecoid flagellomeres, and 3 separate circumfila (in male) or interconnected circumfila (in female); tarsal claws curved near basal third, toothed; ovipositor short, barely protrusible and female cerci separate (Maia et al.