University of Alberta Museums Search

Species Details

Tetracis crocallata

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

Common NameYellow Slant-line SeasonalityAdults fly from mid May to late June. IdentificationA large pale-tan, geo, with the markings restricted to a straight transverse line from the apex to the anal margin of the forewing, a sharp, small discal spot, and a dusting of dark scales. Hindwings unmarked except for a faint discal spot. The straight PM line and absence of other prominent wing markings will separate the two Tetracis species; T. cachexiata is much paler (cream-white), lacks a discal spot and the dusting of dark scales.
Scientific Name Tetracis crocallata Common Name Yellow Slant-line Habitat Deciduous and mixedwood forests, woodlands and shrubby areas. Seasonality Adults fly from mid May to late June. Identification
A large pale-tan, geo, with the markings restricted to a straight transverse line from the apex to the anal margin of the forewing, a sharp, small discal spot, and a dusting of dark scales. Hindwings unmarked except…
A large pale-tan, geo, with the markings restricted to a straight transverse line from the apex to the anal margin of the forewing, a sharp, small discal spot, and a dusting of dark scales. Hindwings unmarked except for a faint discal spot. The straight PM line and absence of other prominent wing markings will separate the two Tetracis species; T. cachexiata is much paler (cream-white), lacks a discal spot and the dusting of dark scales.
Life History
The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segments; colour is extremely variable, ranging from grey to brick, tan or brown. The pupa overwinters (Wagner et al.…
The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segments; colour is extremely variable, ranging from grey to brick, tan or brown. The pupa overwinters (Wagner et al. 2003). The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segments; colour is extremely variable, ranging from grey to brick, tan or brown. The pupa overwinters (Wagner et al. 2003). The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segments; colour is extremely variable, ranging from grey to brick, tan or brown. The pupa overwinters (Wagner et al. 2003).
Conservation The larva is a twig mimic, possessing several shallow warts on the thorax and on the abdominal segme Diet Info McGuffin (1987) lists alder (Alnus sp.) and willow (Salix sp.) as larval hosts. Range T. crocallata is predominantly eastern in distribution, and is at the western edge of its range in Alberta. South to GA and TX (Wagner et al. 2001).

Citation

Page Citation for Tetracis crocallata

Page Citation

"Species Details - Tetracis crocallata, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4306. Accessed 13 Aug. 2022.

Taxonomic Hierarchy

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