Species Details

Synaxis jubararia

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

Common NameOctober Thorn SeasonalityAdults fly throughout September IdentificationThe October Thorn is one a several rather large geometrids that fly in the fall and have autumn-leaf colours of ochres and rust-brown. The discal spots are small and black but distinct; wings with a pointed protrusion at mid-margin. Similar to the extremely variable Prochoerodes transversata, but the PM line joins the wing margin in a straight line, while in transversata it angles sharply near the apex toward the thorax. S. pallulata, which occurs in the Crowsnest Pass region, is very similar, but has heavier crosslines and darker mottling. No structural differences between jubararia and pallulata are known.

Scientific Name Synaxis jubararia Common Name October Thorn Habitat Deciduous and mixedwood forests and woodlands. Seasonality Adults fly throughout September Identification
The October Thorn is one a several rather large geometrids that fly in the fall and have autumn-leaf colours of ochres and rust-brown. The discal spots are small and black but distinct; wings with a pointed protrusion…
The October Thorn is one a several rather large geometrids that fly in the fall and have autumn-leaf colours of ochres and rust-brown. The discal spots are small and black but distinct; wings with a pointed protrusion at mid-margin. Similar to the extremely variable Prochoerodes transversata, but the PM line joins the wing margin in a straight line, while in transversata it angles sharply near the apex toward the thorax. S. pallulata, which occurs in the Crowsnest Pass region, is very similar, but has heavier crosslines and darker mottling. No structural differences between jubararia and pallulata are known.
Life History The marbled grey-brown larvae have a large dorsal hump on the thorax, and resemble twigs (Ives & Wong 1988). The egg likely overwinters, and adults are nocturnal and come to light. Conservation Not of concern. Diet Info Larvae feed on deciduous shrubs, particularly willows (Salix) and alder (Alnus), also on birch (Betula), poplars (Populus) and dogwood (Cornus (McGuffin 1987). Range Essentially a western species, but occurring east to central Saskatchewan, south to CA (McGuffin 1987).

Citation

Page Citation for Synaxis jubararia

Page Citation

"Synaxis jubararia, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4309. Accessed 21 Jan. 2022.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Geometroidea Family Geometridae Subfamily Ennominae Tribe Ourapterygini Genus Synaxis Species Synaxis jubararia
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