Tortricodes Guenée
Type species: hyemana Hübner = alternella Denis and Schiffermüller
DIAGNOSIS
External characters:
Venation:
venation Tortricodes alternella
Forewing: All veins are separate; chorda ill-defined; CuP atrophied medially.
Hindwing: R -M 1 shortly stalked; only 2 M -veins present.
Forewing shape and markings:
Tortricodes alternella male; Tortricodes alternella female 1
Forewing slender; termen oblique; apex rounded.
Additional characters:
Antenna not uniformly ciliated.
Genitalia:
Male:
male genitalia T. alternella
Uncus strong, spined, with small basal lobes devoid any spines; socius well developed; gnathos strong, with wedge-shaped terminal plate; vinculum strong. Valva broad anteriorly, with strongly expanding dorsal portion of basal part of costa; sacculus heavily sclerotized, with subdorsal fold medially; cup-shaped sclerite in basal corner of valva; transtilla membranous with slender sclerotized rods fused with costa; juxta fused with caulis; aedeagus thin, long and highly curved, armed with pair of thin processes situated laterally.
Female:
female genitalia T. alternella
Strongly sclerotized; sterigma semicircular with membranous ostium area; antrum distinctly sclerotized, curved; ductus seminalis subdorsal; signum weak.
Early stages:
Swatschek, 1958, provides the following diagnosis for the larvae based on chaetotaxy.
SV-group consists of 2 setae on mesothorax and metathorax.
Biology:
There is only one generation yearly; hibernation occurs in the pupal stage. Larvae feed in spun leaves of various deciduous trees and shrubs.
Distribution:
Europe.