Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Previous events


Species Pelochrista dorsisignatana - Triangle-backed Pelochrista - Hodges#3116

Triangle-backed Eucosma - Pelochrista dorsisignatana Eucosma similiana - Pelochrista dorsisignatana Triangle-backed Eucosma - Pelochrista dorsisignatana tortricid or crambid moth - Pelochrista dorsisignatana Pelochrista dorsisignatana? - Pelochrista dorsisignatana triangle-backed pelochrista - Pelochrista dorsisignatana Pelochrista dorsisignatana Pelochrista dorsisignatana
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Tortricoidea (Tortricid Moths)
Family Tortricidae (Tortricid Moths)
Subfamily Olethreutinae
Tribe Eucosmini
Genus Pelochrista
Species dorsisignatana (Triangle-backed Pelochrista - Hodges#3116)
Hodges Number
Other Common Names
Triangle-backed Eucosma
Synonyms and other taxonomic changes
Pelochrista dorsisignatana (Clemens, 1860) Gilligan & Wright, 2013 (1)
Poecilochroma dorsisignatana Clemens, 1860
Eucosma dorsisignatana
Phylogenetic sequence # 095550
Explanation of Names
DORSISIGNATANA: from the Latin "dorsum" (the back) + "signum" (a mark); refers to the large dark mark on the moth's back - the "back" in this case meaning the midline where the forewings meet over the abdomen when the moth is at rest
There are more than 168 named species of Eucosma in America north of Mexico. (2)
wingspan 12-22 mm
Adult: forewing ash-gray to brown with faint whitish lines; dark brown patch on inner margin near base; larger paler brown median patch bordered by costa and PM line; markings reduced or absent in some specimens
[description by Charles Covell]
Nova Scotia to Florida, west to Texas, north to Manitoba. (3), (4) , (5)
Moth Photographers Group - large map with some distribution data.
Most records of adults are from July to November. (2)
larvae feed on roots of goldenrod (Solidago spp.)
See Also
Pelochrista similiana - dark mark in median area of forewing is connected to dark subbasal facia
Pelochrista oraria - dark mark in median area of forewing is separated from dark subbasal facia but reaches apex
(Paraphrased from Wright, 2011 (6))
Print References
Clemens, 1860. Proceedings of the Academy of Natural Sciences of Philadelphia. 12:353