Anthracopteryx hiemalis
Anthracopteryx hiemalis is a small click beetle ( Elateridae) and the sole in its . It is notable for winter activity, a rare trait among click beetles. The species has an extremely restricted range in the Front Range of Colorado, USA, spanning from Laramie south to Westcliffe. As of 2017, it was documented in only two observations on iNaturalist and had no prior photographic records on BugGuide.net, indicating it is among the most poorly documented North American elaterids.
Pronunciation
How to pronounce Anthracopteryx hiemalis: //ˌænθrəˌkɒptərɪks haɪˈɛ.məˌlɪs//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other click beetles primarily by its winter activity period and highly restricted geographic range in the Colorado Front Range. As the only in its , it lacks close congeneric relatives for confusion. Small size (6–7 mm) and winter collection date are key field indicators, though definitive identification requires expert confirmation.
Appearance
Small click beetle, approximately 6–7 mm in length. Specific coloration and morphological details beyond size are not documented in available sources.
Habitat
Found in urban-adjacent environments within the Colorado Front Range; specimens have been collected on sidewalks in residential neighborhoods. Specific natural requirements are unknown.
Distribution
to the Front Range of Colorado, USA, with documented range extending from Laramie south to Westcliffe.
Seasonality
Winter-active; have been observed in January under warm winter conditions. This represents an exceptional seasonal pattern for Elateridae.
Behavior
are active during winter on warm days, a highly unusual activity pattern for click beetles. Observed on exposed surfaces (sidewalks) during daytime.
Human Relevance
Of interest to entomologists due to its restricted , status, and exceptional winter activity. The 2017 discovery of photographic documentation highlighted gaps in even well-curated citizen science databases.
Similar Taxa
- Other ElateridaeMost click beetles are spring- to summer-active; winter collection date strongly suggests A. hiemalis in its known range.
More Details
Taxonomic significance
The Anthracopteryx is monobasic (contains only one ), making A. hiemalis phylogenetically unique among North American click beetles.
Documentation history
Prior to 2017, the had no photographic documentation on major North American insect repositories. The original observer established the and species pages on BugGuide.net.