Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Spiramater lutra - Otter Spiramater - Hodges#10301

Caterpillar - Spiramater lutra Unknown Insect #1 - Spiramater lutra Olicve angled shades? - Spiramater lutra Spiramater lutra - Otter Spiramater 10301 - Spiramater lutra Otter Spiramater - Spiramater lutra otter spiramater - Spiramater lutra Spiramater lutra 10301, Otter Arches, Noctuidae, Noctuinae, Hadenini - Spiramater lutra Spiramater lutra MA July - Spiramater lutra
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Noctuoidea (Owlet Moths and kin)
Family Noctuidae (Owlet Moths)
Subfamily Noctuinae (Cutworm or Dart Moths)
Tribe Hadenini
Genus Spiramater
Species lutra (Otter Spiramater - Hodges#10301)
Hodges Number
Synonyms and other taxonomic changes
formerly Lacanobia lutra
Explanation of Names
LUTRA: Lutra is the otter genus, giving rise to the common name Otter Spiramater; perhaps the describer of the species [Guenee in 1852] thought the coloration in some way resembled that of otter fur? (comment by Bob Patterson)
wingspan about 40 mm
Adult: forewing dark brown or blackish with pale (often pinkish) reniform spot, anal patch, and basal patch

Larva: early instars green, later instars brown with a line of black dots down the back
British Columbia to Newfoundland, south in the east at least to Maryland, south in the west to Arizona
adults fly from May to July
larvae feed on alder, arbutus, birch, buffalo-berry (Shepherdia canadensis), choke cherry, fir, gooseberry, hazel, hemlock, pine, poplar, spruce, tamarack, willow
The genus Spiramater is misspelled "Spirameter" at a number of web sites.
See Also
Spiramater grandis (Grand Arches) has a light gray subterminal area, lacks pinkish markings, and has a conspicuous W shape half-way along the terminal line on the forewing. Compare images of both species.
Internet References
live larvae and adult images plus larval description and food plants (Jeremy Tatum, Butterflies and Moths of Southern Vancouver Island)
live adult image (Moth Photographers Group)
pinned adult image (John Glaser, Maryland)
pinned adult image (Bruce Walsh, Moths of Southeastern Arizona)
pinned adult image (A.W. Thomas, Canadian Forest Service)
larval food plants and adult flight season (Ohio State U.)