Arctosyrphus
Frey, 1918
Species Guides
1- Arctosyrphus willingii(northern longbeak)
Arctosyrphus is a of hoverflies ( Syrphidae) established by Frey in 1918. The genus contains a single , Arctosyrphus willingii, which was transferred from the genus Lejops. Members of this genus belong to the rat-tail maggot fly group, characterized by aquatic or semi-aquatic larval development in decomposing organic matter.
Pronunciation
How to pronounce Arctosyrphus: /ˌɑːrktoʊˈsɪrfəs/
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Identification
The can be distinguished from related genera such as Lejops by genitalic and other morphological features that led to its separation as a distinct genus. As a genus, identification to level within Arctosyrphus is straightforward, though distinguishing Arctosyrphus willingii from species of the related genus Lejops requires examination of specific morphological characters, particularly male genitalia.
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Life Cycle
Larval development follows the rat-tail maggot form typical of related eristaline syrphids, with larvae possessing a telescopic breathing siphon that allows respiration while living in aquatic or semi-aquatic environments with decomposing organic material. Specific details of the for this have not been documented.
Ecological Role
As with other rat-tail maggot flies, the larvae likely contribute to nutrient cycling in aquatic and semi-aquatic through consumption of decaying organic matter. hoverflies may serve as , though this has not been specifically documented for this .
Similar Taxa
- LejopsArctosyrphus was formerly classified within Lejops and shares general morphological similarities; it was separated based on distinct genitalic and other structural characters.
More Details
Taxonomic history
The was established by Frey in 1918. Arctosyrphus willingii was transferred from Lejops, indicating a close phylogenetic relationship between these genera.
Data scarcity
With only 9 observations recorded on iNaturalist and no distribution records in GBIF, this appears to be rarely encountered or underreported. The lack of detailed biological information reflects this limited observational base.