Anopina triangulana (Kearfott) (Tortricidae: Tortricinae: Cochylini)
FWL: 5.6–7.8 mm (males); 6.0–7.5 mm (females)
Moderately sexually dimorphic. Head tan to black, mixed with gray white; thorax tan to brown, often heavily suffused with dark brown or black scales anteriorly; labial palpus dark brown to black; ground color of forewing grayish white; faint brown reticulations present over entire surface; basal blotch faint brown; large brown triangular patch present at midpoint of costa extending halfway to inner margin conspicuous in males, more obscured in females; terminal portion of forewing with variably developed pale brown patch along fringe; male without forewing costal fold; hindwing pale brown to gray.
Male genitalia are characterized by a finger-like uncus; reduced socii; elongate, moderate valvae with a well-sclerotized sacculus. Female genitalia are characterized by a broad sterigma; a short, well-sclerotized ductus bursae; and a corpus bursae finely spinulate on the inner surface without a signum.
The following account is summarized from Brown and Powell (2000)Brown and Powell (2000):
Brown, J. W., Powell, J. A. 2000. Systematics of Anopina Obraztsov (Lepidoptera: Tortricidae: Euliini). University of California Publications in Entomology. 120: 1-128..
Mature larva 10–15 mm in length; head pale yellow-orange with darker lateral pigmentation; prothoracic shield concolorous with irregular darker markings; abdomen white; pinacula small; anal shield rounded, sclerotized, pale orange-brown. A complete description of larval chaetotaxy is available in Brown and Powell (2000)Brown and Powell (2000):
Brown, J. W., Powell, J. A. 2000. Systematics of Anopina Obraztsov (Lepidoptera: Tortricidae: Euliini). University of California Publications in Entomology. 120: 1-128..
Anopina triangulana is most likely to be confused with A. silvertonana Obraztsov, a species found in the southern Rocky Mountains. Males of A. triangulana lack the patch of androconial scales near the costa of the hindwing found in males of A. silvertonana. Females lack the pale orange-brown scaling of the basal blotch found in A. silvertonana.
Anopina triangulana is distributed from Marin County, California south to Baja California, Mexico, where it occurs up to 2,750 m in elevation. It is known from the coast to the foothills of the Sierra Nevadas as well as in the Coastal and Transverse ranges.
The following is summarized from Brown and Powell (2000)Brown and Powell (2000):
Brown, J. W., Powell, J. A. 2000. Systematics of Anopina Obraztsov (Lepidoptera: Tortricidae: Euliini). University of California Publications in Entomology. 120: 1-128. and Powell and Opler (2009)Powell and Opler (2009):
Powell, J. A., Opler, P. A. 2009. Moths of western North America. University of California Press, Berkeley. 369 pp..
Eggs are typically deposited singly or in groups of three to five and hatch in one to two weeks, depending on temperature. There are two discrete generations per year in northern populations, the first with adults from May to July and the second with adults from August to September. In southern California, adults can be found from April to November. Larvae have been reared from willow (Salix spp.) and artificial diet, but circumstantial evidence suggests that larvae may prefer to feed on dead leaves on the ground.
View full screen host table here
Authors: KA Austin, TM Gilligan, ME Epstein
Content last updated May 2025
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