Retinia Guénee
Type species: resinana Guenée = resinella Linnaeus
DIAGNOSIS
External characters:
Venation:
venation Retinia resinella
Forewing: Chorda originating halfway between R 1 and R 2, terminating just before R 5; M -stem rudimentary, bifurcate, terminating halfway between M 1 and M 2 and at CuA 1.
Hindwing: M 3 and CuA 1 stalked.
Forewing shape and markings:
Retinia resinella male ; Retinia monopunctata adult ; Retinia cristata adult 2
Forewing elongate-triangular, costal fold absent. Forewing with irregular fasciae.
Genitalia:
Male:
male genitalia R. resinella
Uncus not developed; socius long, finger-shaped, setose; aedeagus short, cone-shaped, with many deciduous cornuti; valva with broad, flat, clasper; ventral margin of valva with large notch, cucullus oval or round, with numerous setae.
Female:
female genitalia R. resinella
Papillae analis flat; seventh sternite broadly sclerotized, sterigma not fused with the latter, ring-like, surrounding ostium bursae. Ductus bursae with well-developed cingulum; corpus bursae with two, usually blunt, signa.
Early stages:
Swatschek, 1958, provides the following diagnosis for the larvae based on chaetotaxy of Retinia resinella.
SV group consisting of three setae on first and second abdominal segments, of four setae on third to sixth, and of two on eighth and ninth. Crochets on abdominal prolegs uniordinal.
Biology:
Retinia resinella completes its life cycle within two years and hibernates as a larva; Retinia preangustana Snellen has one year cycle and hibernates in pupal stage. Food plants are the conifers; the larvae may bore the needles, live under bark or in cones; Retinia monopunctata has one generation per year; larvae tunnel into cones and shoots of Abies and Picea, and cones of Pinus and Larix. Pupation takes place in cocoons in cones and shoots; pupae hibernate.
Distribution:
Palaearctic and Nearctic regions.