Apantesis obliterata

(Stretch, 1885)

Steppe Tiger Moth

Apantesis obliterata is a tiger moth in the Erebidae, originally described from North America in 1885. It exhibits a transcontinental distribution spanning northern Eurasia and North America, with in Russia, Mongolia, and the Canadian prairie provinces. The inhabits grassland and is active in late summer and early autumn. It was transferred from the Grammia to Apantesis as part of a broader taxonomic reorganization of tiger moths.

Apantesis obliterata by (c) Doug Macaulay, some rights reserved (CC BY), uploaded by Doug Macaulay. Used under a CC-BY license.

Pronunciation

How to pronounce Apantesis obliterata: /əˈpæn.tə.sɪs ˌɒb.lɪˈtɛr.ə.tə/

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Identification

The small forewing length of approximately 16 mm distinguishes this from larger Apantesis . The specific epithet 'obliterata' (meaning 'erased' or 'obliterated') may refer to reduced or faint wing markings, though this interpretation is speculative. Accurate identification requires examination of genitalia or molecular analysis, as wing patterns within Apantesis are often similar and variable. The species is most readily identified by its occurrence in the northern Great Plains and adjacent regions during late summer.

Images

Habitat

Grasslands. Specific vegetation associations are not documented.

Distribution

Russia (Khakasia, eastern Sayan, southern Baikal region, Transbaikalia, Middle Amur basin, central Yakutia), Mongolia, and North America (Alberta, Saskatchewan, Manitoba, Northwest Territories).

Seasonality

are on wing in late summer and early fall.

Diet

Larvae probably feed on various herbaceous plants.

Similar Taxa

Apantesis phalerataOverlaps in North American prairie distribution and shares similar grassland ; requires careful examination to distinguish.
Grammia species (former congeners)Formerly classified in the same ; similar size range and general tiger moth appearance, though Grammia typically have more boldly patterned wings.

More Details

Taxonomic History

This was originally described by Richard Harper Stretch in 1885. It was formerly placed in the Grammia, but was transferred to Apantesis along with other species from the genera Grammia, Holarctia, and Notarctia as part of a taxonomic revision of tiger moths.

Beringian Distribution

The trans-Beringian distribution pattern, with in both northern Asia and northwestern North America, is shared with several other Apantesis and reflects historical connections between these regions during Pleistocene glaciations.