Elytron


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elytron

[′el·ə‚trän]
(invertebrate zoology)
One of the two sclerotized or leathery anterior wings of beetles which serve to cover and protect the membranous hindwings.
A dorsal scale of certain Polychaeta.
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 It might be outdated or ideologically biased.

Elytron

 

one of the anterior wings that in most insects cover the posterior wings when the latter are folded along the dorsal wall of the body. Beetles have thickened elytra with practically no evidence of venation. The elytra of the Dictyoptera and Orthoptera are leathery and have noticeable or pronounced venation. Some insects, such as earwigs, have veinless elytra. In bedbugs, only the base of each elytron is thickened; the tip is membranous.

Elytra that are particularly thick no longer function as active organs of flight, becoming merely carrying surfaces (as in the June beetle), or play no role in flight at all (for example, the Cetonia). Many beetles in desert regions have greatly reduced posterior wings, and their elytra, as a rule, have fused to form a solid cover over the abdomen. The cavity under the elytra is exposed to the external atmosphere by a small opening at the top of the abdomen. Spiracles open into the cavity; the air in the cavity is heavily saturated with water vapor to minimize water loss during respiration. In many water beetles, for example the Dytiscidae, the cavity stores air, which the beetle can breathe as it swims through the water.

M. S. GILIAROV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
On each elytron, first patch like inverted V-shaped, second complete W-shaped and the third one somewhat round.
“This was definitely a challenge to us as we needed to be very precise with cutting those shapes or else they would not fit together, but it is for sure one of our most interesting and exciting projects which created a whole buzz here at our shop.” Elytron's unique VTOL prototype is a modern design combining capabilities of both a helicopter and an airplane.
Elytron 2.4x longer than wide, with shallow punctures along the striae, and the interstriae weakly rugo-punctate, mostly glabrous, with a few scattered short setae near posterior borders.
Elytra parallel-sided, gently tapering at apical 1/3, each elytron densely punctate, those punctures slightly deeper than on pronotum.
N Mean Min Max mean M/mean F MALES Body length 7 18.01 16.15 19.82 0.68 Pronotum 7 4.97 4.66 5.19 0.78 Elytron 7 6.17 5.51 6.67 0.77 Hind femur 7 11.01 10.67 11.55 0.82 FEMALES Body length 9 26.57 25.20 29.00 Pronotum 9 6.39 5.90 6.8 Elytron 8 8.04 7.10 9.1 Hind femur 9 13.50 12.56 14.39 Table 2.
3(4) each elytron with longitudinal striae from yellow pubescence; abdominal sternites (Fig.
The file is highly developed on the left elytron and only marginally developed on the right elytron (Fig.
They are black in color, with a prominentvenation and reticulum; there is a narrow tapering yellow stripe centred on the first anal vein, which does not reach the tip of the elytron. Wings cycloid, opaque blackish brown, somewhat paler at the base.