Species Details

Metarranthis duaria

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

Common NameRuddy Metarranthis SeasonalityLate April to early July, most common from mid May to mid June. IdentificationQuite variable in the extent and colouration of wing markings. Reddish brown to brown-grey ground colour with dark AM and PM lines, PM line often bordered proximally with reddish brown. Discal spots black and prominent. Forewing apex often slightly falcate. Very similar to M. warnerae, but overall colour has reddish-brown overtones and patches, while warnerae is entirely brownish-grey. M. warnerae has a smoother, straighter PM line than M. duaria. McGuffin (1987) also states that the presence of dark shading on the inside of the PM line distinguishes warnerae from duaria, but this trait is found in both species in Alberta.

Scientific Name Metarranthis duaria Common Name Ruddy Metarranthis Seasonality Late April to early July, most common from mid May to mid June. Identification
Quite variable in the extent and colouration of wing markings. Reddish brown to brown-grey ground colour with dark AM and PM lines, PM line often bordered proximally with reddish brown. Discal spots black and…
Quite variable in the extent and colouration of wing markings. Reddish brown to brown-grey ground colour with dark AM and PM lines, PM line often bordered proximally with reddish brown. Discal spots black and prominent. Forewing apex often slightly falcate. Very similar to M. warnerae, but overall colour has reddish-brown overtones and patches, while warnerae is entirely brownish-grey. M. warnerae has a smoother, straighter PM line than M. duaria. McGuffin (1987) also states that the presence of dark shading on the inside of the PM line distinguishes warnerae from duaria, but this trait is found in both species in Alberta.
Life History
This species is often common in deciduous forest and shrubland, from prairie riparian forest to the central boreal region. The larvae are stout and mottled brown (Wagner et al. 2001), reminiscent of a cutworm…
This species is often common in deciduous forest and shrubland, from prairie riparian forest to the central boreal region. The larvae are stout and mottled brown (Wagner et al. 2001), reminiscent of a cutworm (Noctuidae) rather than the typical geometrid body-plan of mimicking twigs. Wagner et al (2001) note that mature larvae are virtually never collected from trees or shrubs; Prentice (1963) notes a similar situation. Larvae may feed only at night and rest on tree boles or on the ground during the day (Wagner et al. 2001). McGuffin (1987) notes that eggs are laid without adhering to any substrate, and these would undoubtedly end up on forest floor. This species may spend most of its time among leaf litter rather than depending on crypsis on host branches like many geometrids.
Conservation Not of concern. Diet Info Rosaceous shrubs including Prunus, Rosa, Crataegus, Amelanchier, and Holodiscus; also Betula and Populus (McGuffin 1987). Range Southern BC east to Nova Scotia, south to GA, CO, and WA (McGuffin 1987).

Citation

Page Citation for Metarranthis duaria

Page Citation

"Metarranthis duaria, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4303. Accessed 25 Jul. 2021.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Geometroidea Family Geometridae Subfamily Ennominae Tribe Anagogini Genus Metarranthis Species Metarranthis duaria
This hierarchy is created from our museum records, it may not always accurately reflect modern taxonomies.

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum