Native
Anopina triangulana (Kearfott) (Tortricidae: Tortricinae: Cochylini)
FWLFWL:
forewing length; the distance from the base of the forewing to the apex, including fringe
: 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 reticulationsreticulations:
covered with a network of lines or mesh; in reference to wing pattern, usually thin horizontal lines 
present over entire surface; basal blotch faint brown; large brown triangular patch present at midpoint of costacosta:
the anterior margin of each wing 
extending halfway to inner margininner margin:
see dorsum 
conspicuous in males, more obscured in females; terminal portion of forewing with variably developed pale brown patch along fringe; male without forewing costal foldforewing costal fold:
a flap or fold at the base of the forewing that contains specialized sex scales
; hindwing pale brown to gray.
Male genitalia are characterized by a finger-like uncusuncus:
a sclerotized process which is fused to the posterodorsal margin of tergum IX
; reduced sociisocii:
a pair of lightly sclerotized setose lobes
; elongate, moderate valvaevalva:
an appendage flanking the intromittent organ that is used to clasp the female during copulation
with a well-sclerotized sacculussacculus:
the ventral margin of the male valva 
. Female genitalia are characterized by a broad sterigmasterigma:
the sclerotized region surrounding the female ostium bursae 
; a short, well-sclerotized ductus bursaeductus bursae:
a membranous tube connecting the ostium bursae to the corpus bursae
; and a corpus bursaecorpus bursae:
a dilated membranous sac at the anterior end of the bursa copulatrix
finely spinulate on the inner surface without a signumsignum:
a sclerotized projection or patch on the interior of the corpus bursae
.
The following account is summarized from Brown & Powell (2000).
Mature larva 10-15 mm in length; head pale yellow-orange with darker laterallateral:
to the side
pigmentation; prothoracic shieldprothoracic shield:
a sclerotized plate on the dorsal surface of the prothorax 
concolorous with irregular darker markings; abdomen white; pinaculapinaculum:
flattened sclerotized plates on a caterpillar that bear the setae
small; anal shieldanal shield:
a sclerotized plate on the dorsal surface of the last abdominal segment (in larvae) 
rounded, sclerotizedsclerotized:
hardened; usually in reference to larval structures or adult genitalia 
, pale orange-brown. A complete description of larval chaetotaxychaetotaxy:
the arrangement of setae (in reference to Lepidoptera larvae), often depicted on a "setal map"
is available in Brown & Powell (2000).
Anopina triangulana is most likely to be confused with A. silvertonana Obraztsov, a species found in the southern Rocky Mountains. Males lacks the patch of androconial scales near the costacosta:
the anterior margin of each wing of the hindwing found in males of A. silvertonana. Females lack the pale orange-brown scaling of the basal blotch found in A. silvertonana.
The following is summarized from Brown & Powell (2000) and Powell & Opler (2009).
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.
| Host plant | Host plant family | Reference(s) |
| Heteromeles sp. | Rosaceae | Powell 2006Powell 2006: Powell, J. A. 2006. Database of Lepidoptera rearing lots, 1960-2005. University of California Berkeley, CA. |
| Salix sp. | Salicaceae | Powell 1964bPowell 1964b: Powell, J. A. 1964b. Biological and taxonomic studies on tortricine moths, with reference to the species in California. University of California Publications in Entomology. Vol. 32. 317 pp.; Brown & Passoa 1998; Powell 2006Powell 2006: Powell, J. A. 2006. Database of Lepidoptera rearing lots, 1960-2005. University of California Berkeley, CA. |
| Ulmus sp. | Ulmaceae | Powell 2006Powell 2006: Powell, J. A. 2006. Database of Lepidoptera rearing lots, 1960-2005. University of California Berkeley, CA. |
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Anopina triangulana is distributed from Marin County, California south to Baja California, Mexico, where is occurs up to 2750 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.
