Acrotrichinae
Reitter, 1909
Tribe Guides
2Acrotrichinae is a of featherwing beetles (Ptiliidae) first established by Reitter in 1909. Members of this subfamily include some of the smallest beetles known, with body lengths often under 1 mm. The subfamily contains the Phytotelmatrichis, which was discovered exclusively in phytotelmata of Zingiberales plants in southern Peru, suggesting specialized associations within the group.
Pronunciation
How to pronounce Acrotrichinae: //ˌækroʊtrɪˈkaɪniː//
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Identification
Habitat
Includes phytotelmata—aquatic microhabitats formed in hollows of leaves and floral bracts of Zingiberales plants; broader range for the beyond this specialized has not been documented.
Distribution
Documented from southern Peru for the Phytotelmatrichis; broader geographic distribution of the requires further study.
Host Associations
- Calathea - phytotelmata in leaves and floral bracts
- Heliconia - phytotelmata in leaves and floral bracts
- Alpinia - phytotelmata in leaves and floral bracts
- Renealmia - phytotelmata in leaves and floral bracts
Behavior
The Phytotelmatrichis has been observed to be restricted to phytotelmata; extensive sampling of other in the same region over five years using multiple techniques failed to yield specimens, indicating strong habitat fidelity.
Similar Taxa
- PtiliinaeOther of Ptiliidae; distinguished by genitalic and wing venation patterns
- CephaloplectinaeOther Ptiliidae ; Acrotrichinae separated by structural characters of the genitalia and wings
More Details
Habitat specialization
The discovery of Phytotelmatrichis represents the first documented association of Acrotrichinae with phytotelmata, suggesting that undiscovered diversity in this may be tied to specialized microhabitats that are rarely sampled.
Size and sampling challenges
As with all Ptiliidae, Acrotrichinae are extremely small and easily overlooked in standard insect surveys, likely contributing to their underrepresentation in collections and limited knowledge of their .