clypeus

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  • noun

Words related to clypeus

a shield-like plate on the front of an insect's head

References in periodicals archive ?
0 mm; cranium smooth, colour yellowish brown; frons with median longitudinal depression, single posterior frontal seta and single anterior angle seta; one round pigmented area medially at each side of frontal suture; dorsoepicranium with 2 widely separated, medium sized setae at each side; tentorial pits evident; stemmata evident; clypeus subtrapezoidal in shape, with 1 posterior clypeal seta and 1 or 2 exterior clypeal setae; preclypeus weakly sclerotized, without setae; labrum with anterior border trilobed and clithra present; epipharynx (Fig.
But it is not Vespula austriaca: there is no long pilosity on the outer side of the hindtibia, and the clypeal angles are sharp but not acute.
Colour: Carapace with two ill-defined longitudinal brown stripes; setae dark brown; clypeus white, white clypeal mark extending to above AMEs; eye region brown; eye tubercles greyish brown.
Differing from holotype as follows: clypeus narrower, apex truncate and scarcely reflexed; clypeal surface transversely rugose; clypeofrontal carina more elevated, anteriorly arcuate; frons with larger and denser punctures; vertex without horns, with strong, anteriorly arcuate carina, lateral ends of carina placed in line with the median portion of eyes; pronotum without projections neither concavities, with anterior, robust, arcuate carina; pygidium less convex; last abdominal visible sternite not narrowed; protibiae not elongated, with larger teeth.
White hairs form clypeal mat and pale stripes on sides of carapace.
The original genus Argyrodes was considered to be distinct from two related genera, Rhomphaea and Ariamnes, based on differences in eye arrangement, clypeal modification, and relative length of metatarsi (Simon 1893).
Additional characters differentiating the two species include: (a) small and sharply upturned clypeal teeth in O.
Clypeal height more than twice the AME; chilum divided (Fig.
A groove around the clypeus, 'the clypeal groove', appeared to house the retracted or looped stylets, especially the part of the loop closer to the labium (Figs.
Median set of clypeal teeth narrow and cuspate; a blackish fascia crossing the two cubital cells and apex of second discoidal cell in forewing (Giner Mari, 1945: 854; Tsuneki, 1983a: 73).
When viewed anteriorly, distance between clypeal margin and a hypothetical line joining these eyes at their centres 0.
1D, J); basal half of clypeal disk conspicuously convex 2 --Epicnemium without delimiting carina, with or without small, shallow central depression anteriorly; two acetabular carinae meeting in medioventral carina, not forming obtuse angle (Fig.