Entomology Collection TitleImage Bugs Pinned
Species Page - Plataea trilinearia
species list search results ->Plataea trilinearia ->species page

E-mail this Page   
Print this Page   
Link to this Page   

scientific name    Plataea trilinearia    

common name     Sagebrush Girdle

Sagebrush flats and prairie badlands.

Alberta flight dates range from late May to early August, possibly indicating two broods.

A relatively large geometrid, with striking white and light grey forewing pattern. Median band with sinuate borders and a large white discal spot, light grey wing margin with a white subterminal line, wing fringe checkered black and white. Hindwing white with a loose band of median and subterminal speckling, more pronounced on the underside. Females slightly smaller. The Sagebrush Girdle is similar to Caripeta species, but none of the Caripeta are pale silver-grey and white like trilinearia, and inhabit conifer forests rather than sagebrush grasslands.

life history
This graceful moth is one the few geometrids which are restricted to prairie habitats; the pale silver-grey colouration matches that of its surroundings of sagebrush and prairie. Except for the egg, the immature stages are undescribed (McGuffin 1987).

Not of concern.

diet info
The larval hostplant is unconfirmed, but the sister species P. personaria feeds on Artemisia tridentata, a plant with which trilinearia is closely associated in Alberta and BC (Anderson 1923).

Southern Alberta and BC south through the western US to Mexico (McGuffin 1987).

quick link

Comments (0)Add New Comment

Comments are published according to our submission guidelines. The EH Strickland Entomological Museum does not necessarily endorse the views expressed.

Add New Comment (all fields are required)

Related Species Info
Display Hierarchy
References (1)
Specimen Info
There are 40 specimens of this species in the online database
Map Distribution
Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (40)
Related Links
Moth Photographers Group


Logo Department of Museums and Collections ServicesLogo University of Alberta