Hypogastrura tooliki
Fjellberg, 1985
toolik snow flea
Hypogastrura tooliki, commonly known as the toolik , is a of in the . It belongs to the Hypogastrura, which contains species often found active on snow surfaces during winter months. The species was described by Fjellberg in 1985. Like other members of its genus, it possesses cryoprotectant that enable activity in subfreezing conditions.
Pronunciation
How to pronounce Hypogastrura tooliki: /ˌhaɪpoʊɡæˈstruːrə tuːˈliːki/
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Identification
As a member of Hypogastrura, this likely shares the characteristics of small size (1–2 mm), dark coloration that contrasts visibly against snow, and the presence of a for jumping . Definitive identification to species level requires examination of and other microscopic features described in Fjellberg's 1985 original description. Distinguished from the more widely known Hypogastrura nivicola by specific morphological details and geographic distribution.
Habitat
Based on -level and the epithet, this is associated with cold environments. The specific epithet "tooliki" suggests a connection to the Toolik Lake region of Alaska. Requires moist substrates; members of this genus are often observed on snow surfaces where they forage for matter deposited from above.
Distribution
Known from Alaska, specifically the Toolik Lake region (North Slope). The single iNaturalist observation and description origin support this restricted distribution.
Seasonality
Active during winter months when snow cover is present; capable of movement and foraging at subfreezing temperatures due to cryoprotectant .
Similar Taxa
- Hypogastrura nivicolaAlso called "," widespread in temperate North America; differs in geographic range and specific morphological features
- Hypogastrura socialisAnother -alpine Hypogastrura with overlapping preferences; requires microscopic examination for separation
More Details
Etymology
The specific epithet "tooliki" refers to Toolik Lake, a research station location in the Brooks Range of northern Alaska where the was likely first collected and described.
Taxonomic note
The -level placement of remains debated; treated here as Class Collembola following modern authorities, though historically placed within as Collembola.