Tortrix Linnaeus
Type species: viridana Linnaeus
DIAGNOSIS
External characters:
Venation:
venation Tortrix viridana
Forewing: All veins separate; R 5 to termen apically; chorda hardly preserved,
M -stem atrophied.
Hindwing: All veins separate.
Forewing shape and markings:
examples of Tortrix spp.
Forewing slightly expanding posteriorly; costa gently curved throughout (in males).
Only two species described in this genus: viridana Linnaeus has light green forewings; sinapina Butler has pale yellow forewings with two brownish oblique fasciae.
Sexual dimorphism:
Forewing broader in females; markings similar in males and females.
Genitalia:
Male:
male genitalia T. viridana
Apical lobes of tegumen small; tuba analis simple, short, membranous distally; socius large, elongate, drooping. Valva large, with well-developed slender costa; sacculus broad, weakly concave ventrally, with short, rounded, spined termination; brachiola short, subtriangular, rounded apically. Transtilla membranous, partially sclerotized at sides. Aedeagus with well-developed coecum penis; vesica with several short cornuti. Coremata absent; areas of scent scales on sides of pedunculus normally developed.
Female:
female genitalia T. viridana
Ovipositor floricomous; anterior portion of papilla analis short, rounded, remaining part very broad, convex dorsally; nail-head like bristles with fairly small terminations grouped in a transverse band. Eighth tergite very short, broad; sterigma short, with convex anterior parts and folding lateral portions; apophyses anteriores short, thick. Ostium bursae in very narrow sclerite; ductus bursae long, membranous; signum stellate.
Early stages:
Larva: body green or greyish-green, with brown or black pinacula.
Chaetotaxy (viridana): SD1 and D1 on common pinaculum or on touching pinacula on A9; SV group on A1, 2, 7, 8 and 9 is 3:3:2:2:2; L-setae on A1 set diagonally; V1 setae about twice as far apart on A9 than on A8.
Biology:
A single generation yearly; hibernation in egg stage; young larvae are monophagous on oak; last stages are polyphagous.
Distribution:
Palaearctic Region.