Apotomis Hübner
Type species: turbidana Hübner = corticana Haworth
DIAGNOSIS
External characters:
Venation:
Forewing: All veins separate.
Hindwing: M 3 and CuA 1 connate.
Forewing shape and markings:
Apotomis lutosana adult
Markings variable.
Additional characters:
Posterior tibia with tuft of scent scales; hindwing with anal fold.
Genitalia:
Male:
male genitalia A. lutosana
Tegumen long with oblique or rounded shoulders; uncus flattened dorso-ventrally, scarcely haired, with some subterminal setae; socius broad, rounded or elongated, densely bristled; tuba analis strong, well sclerotized ventrally, with latero-terminal lobes. Basal opening elongate; sacculus with more or less distinct angle. Ventral margin of valva with large lobe, armed with strong spines and innumerous hairs; neck of valva gradually expanding posteriorly into an elliptic, setose cucullus. Aedeagus short, simple; single cornutus with elongated capitulum present; caulis short.
Female:
female genitalia A. turbidana
Sterigma plate-shaped, expanding around ostium bursae, often produced posteriorly, anterior angle convexely rounded, exceptionally developing a membranous fold. Median part of ductus bursae swung, sclerotic, ductus seminalis originating here. Two small scobinate concavities represent the signa.
Early stages:
Swatschek, 1958, provides a diagnosis for the larvae of over 20 species of 'Olethreutes' (in fact larvae of several genera such as Hedya, Celypha, Pseudosciaphila, Olethreutes, Phiaris, Argyroploce, Apotomis, Stictea, Eudemis and Orthotaenia).
Crochets on abdominal prolegs biordinal; D1 and SD1 on separate pinacula on A9, or SV group bisetose on A7. Sutura coronalis significantly longer than greatest width of adfrontals, or L1 and L2 more or less equal in length.
Biology:
Single generation yearly, rarely two; larvae hibernate. Food plants are mainly Salicaceae, the larvae feeding in spun leaves.
Distribution:
Palaearctic, Oriental and Nearctic Regions.