pulvillus

(redirected from pulvilli)
Also found in: Dictionary, Medical.

pulvillus

[‚pəl′vil·əs]
(invertebrate zoology)
A small cushion or cushionlike pad, often covered with short hairs, on an insect's foot between the claws of the last segment.
Mentioned in ?
References in periodicals archive ?
3]; pulvilli present only on fourth tarsomere of all legs, tarsal claws simple, symmetrical, arolia present.
Length of the first segment of a hind tarsus longer than the third, pulvilli shallow, individually increasing in length distad, all apices of pulvilli sharp.
Claws, pulvilli and empodia well-developed (metathoracic empodia border on being inflated and laterally compressed as seen in Empodiodes Oldroyd, 1972).
Entirely black; ventral surface of fore with few tenant hairs, fore tibia with 2-3 medial ad, slightly longer than body hairs, 1-2 medial pv; mid femur av rows short and thin, hairs-like, with a complete pv row, mid tibia with 1 submedial ad, strong, 2 medial v, 1 submedial p; hind femur with a complete but sparse av row, and a row of strong pv in basal half, ventral surface of basal part with setae, fringe-like, hind tibia with 1 av, 2-3 ad, 2-3 pd; tarsi slightly shorter than tibiae, claw and pulvilli developed, subequal to the length of 5th tarsomere.
The pretarsus is also distinctive, with the distally angulate claws (11-1), greatly expanded lamellate parempodia (12-1), and greatly enlarged pulvilli (13-1).
3-4): claws falciform, untoothed; empodia less than 1/2 length of claws; pulvilli about 1/4 length of claws.
Thorax: Prosternum small and isolated (not large and abutting pronotum as in Oligopogon); propleuron fine setose; mesonotum flat (not greatly elevated and hump-like as in Oxynoton Janssens, 1951 and some Oligopogon) and punctate; acrostichal, dorsocentral, postpronotal and postalar macrosetae undifferentiated; scutellum lacking apical macrosetae; scutellar disc setose; anepimeral macroseta absent; katatergite setose; anatergites asetose; postmetacoxal area membranous; prothoracic femora slender; mesothoracic tarsomeres 4 and 5 without modified setae (as in Habropogon Loew, 1847); pulvilli well developed; metathoracic empodia simple (not large and laterally compressed as in Empodiodes Oldroyd, 1972); costa extends only as far as Cu[A.
DISCUSSION: This genus was synonymized with Campylomma by Carvalho (1952), but Schuh (1984) reinstated it as a separate genus distinguished on the basis of enlarged pulvilli that cover nearly the entire ventral surface of the claws, and the distinctive structure of the vesica.
9-10): claws strongly curved just beyond midlength, with basal tooth on fore- and midlegs, without tooth on hindlegs; empodia reaching curve of claws; pulvilli short, about 1/4 length of claws.
Among other South African phyline genera, Schuhistes is most similar to Karoocapsus Schuh in its dark coloration with contrasting colored maculae, and similarly small, unelaborated, and slender endosoma; Schuhistes can be distinguished from Karoocapsus by its possession of simple and thickened setae on the head, thorax and hemelytra, the relatively large pulvilli, and the host plants (i.
4-5] with longer dorsal setae at apex, It5 with enlarged pulvilli and claws absent (MSSC); pulvilli and claws of mid and hind legs unmodified.