Synonyms and other taxonomic changes
Pseudosciaphila duplex (Walsingham, 1895)
Penthina duplex Walsingham, 1895
(1)
Argyroploce thallasana McDunnough, 1922
Phylogenetic sequence #620538
Explanation of Names
Specific epithet is Latin meaning "twofold, double" but it's unclear from the description what it refers to.
(1)Size
Wingspan 18-27 mm.
(2),
(1)
Forewing length 10-13 mm.
(3)Identification
Adult - forewing of typical form resembles a bird dropping -- dark gray in basal, medial, and terminal areas, and whitish in antemedial (AM) and postmedial (PM) areas; dark medial patch is widest at inner margin, tapering with irregular edges to a blunt point at costa; short black marks along distal half of costa; small black patch at apex; some individuals have a mostly dark brown forewing, and others have a mostly light brown forewing; hindwing in all forms dark gray with pale fringe.
(3)Range
Northern United States and southern Canada: Quebec and New England to northern California and British Columbia.
Type locality: Loveland, Colorado.
Food
Larvae feed on leaves of
quaking aspen (
Populus tremuloides), rarely birch, plum or willow.
(4),
(3)See Also
Dusky leafroller (
Orthotaenia undulana) forewing has less white/more gray, a more extensive medial patch, and a slightly different pattern of markings.
Print References
Walsingham, Lord. 1895. XXI. New Species of North American Tortricidae.
Transactions of the Entomological Society of London, 1895:
501;
Pl.12, f.4.
(1)Contributed by
Robin McLeod on 8 March, 2008 - 11:02pm
Additional contributions by
Randy HardyLast updated 8 January, 2018 - 5:39pm
