tegmen

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

tegmen

[′teg·mən]
(biology)
An integument or covering.
(botany)
The inner layer of a seed coat.
(invertebrate zoology)
A thickened forewing of Orthoptera, Coleoptera, and certain other insects.
Mentioned in ?
References in periodicals archive ?
2b,d,e); stridulatory organ on left tegmen of male not protruding beyond the tegminal margin, brownish without three black dots; distal margin brownish-yellow.
Coloration and structure of body similar to those of male, but pronotal disc with brownish marks on hind half, darkened tegminal spots somewhat larger and partly fused with each other, and wings slightly longer (ratio tegmen/hind femur 0.
The genus is unique within Phaneropterinae in that the tegminal venation with all main branches in the strongly widened medial field are curved dorso-anteriorally i.
The first documented example was with Amblycorypha uhleri (Stal, 1876), where Walker & Dew (1972) recorded different tegminal movement patterns using high speed photography.
Occiput and postocular portions of genae, pronotum (except lower portions of lateral lobes), tegmina and all other portions of body shining blackish-brown (except whitish markings on episterna described above and last two sternites of females which are greenish); tegminal pads do not surpass the second abdominal tergite.
Hind wings, yellow, semitransparent; tegminal membrane (between the veins) light green, internal and ventral faces of hind femora, internal face of hind tibia, blue black.
These groups can be distinguished by characteristics including: coloration of the head, pronotum and abdomen; antennae color; antennal markings on the pedicel and scape; tegminal morphology; song character (chirping vs trilling and continuous vs intermittent); and song pulse rate at given temperatures.
The following ratios are used in the species descriptions: Tegminal index (TgW/TgL): maximum width divided by maximum length.
Assuming consecutive tooth strikes upon the file are made on tegminal closure rather than opening (see Morris & Walker 1976), each graph of file patterns begins with first tooth closest to the anal margin of the tegmen; it ends with a last tooth closest to the costal margin.
Although in most species of Ensifera the fore wings are bilaterally symmetrical (or almost so), the mechanism of sound production by tegminal stridulation is inherently asymmetrical, as one wing is always on top of the other (Forrest 1987).