Eucosma dorsisignatana

Eucosma dorsisignatana, the triangle-backed eucosma, is a species of moth of the family Tortricidae. It is found in North America, where it has been recorded from Nova Scotia to Florida, west to Texas and north to Manitoba.

Eucosma dorsisignatana
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Tortricidae
Genus:	Eucosma
Species:	E. dorsisignatana
Binomial name
Eucosma dorsisignatana (Clemens, 1860)
Synonyms
Poecilochroma dorsisignatana Clemens, 1860 Pelochrista dorsisignatana Paedisca clavana Zeller, 1875 Eucosma dorsisignatana var. diffusana Kearfott, 1905 Carpocapsa distigmana Walker, 1863

The wingspan is 12–22 mm. The forewings are ash grey to brown with faint whitish lines. There is a dark brown patch on the inner margin near the base and a larger paler brown median patch bordered by the costa and the postmedial line. Adults are on wing from July to November.

The larvae feed on the roots of Solidago species.