n.1.(Zool.) A small inclosed area; esp. one of the small spaces on the wings of insects, circumscribed by the veins.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Radial cell 3.4 times longer than wide, open along anterior margin, areolet small.
El ala anterior carece de areolet y de vena 2rs-m; vena 3rs-m presente, ubicada muy distalmente de 2m-cu y, la celda discosubmarginal frecuentemente con un area anterior glabra o de pocos pelos denominada fenestra (Gauld & Lanfranco 1987, Gauld 1988, Lee & Kim 2002).
1.25 times longer than body, weakly brown-infuscated, pubescent, with cilia on margins; radial cell opened, around 3.1 times as long as broad; veins dark brown; areolet small or absent.
Fore wing sparsely hirsute; distal abscissa of M and Cu1 spectral or absent (Figure 9); areolet absent or small and petiolate above, petiole usually longer than height of areolet....
Nevertheless, they are assigned to the Labenopimplinae on the basis of their characteristically shaped areolet: Labenopimpla has the areolet pentagonal with a relatively long 4M and subvertical r-m, and Rugopimpla has a quadrangular areolet, but all Palaeoichneumoninae have the areolet pentagonal with oblique r-m.
Forewing longer than body, hyaline, with long cilia on margins, veins brown, radial cell 2.6-2.8 times as long as broad; R1 invisible, Rs indistinct, nearly straight, nearly reaching margin of wing; areolet small, triangular, closed and indistinct.
In some features, Neotropical species of Seticornuta resemble Leurus species, with the small, more or less enclosed rhombic areolet in the fore wing (which can be absent in Leurus) and both have the lateromedian longitudinal carinae of the propodeum fused into a broad ridge behind the posterior transverse carina (Figure 5).
This species-group is characterised by having the propodeum with a narrow elongated area superomedia (Figure 4), and a tooth or prominence at the point where the lateral and posterior transverse carinae meet; having the scutellum subquadrate, by having a very large areolet in the fore wing, and by having a strong transverse crest at the front end of the notaulus.
nigrovittatum species-group characterized by absence of the areolet and black-marked yellow hind coxa.
The characteristics of the genus include the following: areolet large, propodeum roughly sculptured, T1 with shape variable and often sculptured, and a weak suture between T2 and T3.