P. Stys, EVOLUTIONARY ORIGIN OF SQUAMIFORM MICROSCULPTURE ON THE FOREWING-HOLDING DEVICES (FRENAE) IN HETEROPTERA, European journal of entomology, 95(2), 1998, pp. 307-310
Frenae are forewing-holding ridges situated in the Heteroptera paralle
l to the lateral sides of mesoscutellum, and covered by a squamiform,
overlapping, glabrous microsculpture. The situation found in Rectilami
na sp. (Dipsocoromorpha: Schizopteridae: Hypselosomatinae) suggests th
at each single squamiform element is homologous to a strongly modified
microtrichium, and that, at least in this case, there is no basic dif
ference between microtrichium and acanthus.