Other Common Names
H. nivicola, H. harveyi, and H. tooliki are active in winter and are called "snow fleas".
Nearctica lists 81 species.
Per Frans Janssens here
, some diagnostic characters of Hypogastrura
1. poor dorsal setal coverage (few setae per segment)
2. short furca
3. small anal spines
4. 8 ocelli in each eyepatch