Comantella cristata
(Coquillett, 1893)
Comantella cristata is a small to medium-sized robber fly in the Asilidae, distinguished by its humpbacked profile and distinctive seasonal activity pattern. are active in early spring and late fall, a trait that helps separate this from similar . The species is known from Idaho and California, where it perches on bare soil in open fields to hunt prey. Like other robber flies, it is a predatory insect, though specific prey records for this species are limited.
Pronunciation
How to pronounce Comantella cristata: /kɔːˈmæn.tɛl.lə krɪˈstɑː.tə/
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Identification
The combination of early spring and late fall activity, humpbacked profile, and presence of a slender spur on the front tibia tip separates Comantella from similar robber fly . Within the genus, C. cristata is distinguished from C. pacifica, C. rotgeri, and C. fallei by geographic range (Idaho and California) and subtle differences in body hair coloration and terminal style length relative to the third antennal segment. The genus is in need of taxonomic revision, and current keys rely heavily on these morphometric and setal characters.
Appearance
Small to medium-sized fly, 10-15 mm in length. Body covered in long hair, including on the legs. has a prominent "mane" of erect hairs resembling a Mohawk hairstyle. Humpbacked in profile. Front tibia bears a slender spur at the tip. Coloration involves hair patterns used in identification, with terminal style length relative to third antennal segment being a key diagnostic feature.
Habitat
Open fields with bare soil; rarely found on vegetation. Perches on ground in vast open areas.
Distribution
Known from Idaho and California in western North America.
Seasonality
active in early spring and late fall. One record indicates a mating pair observed on March 12 in Colorado Springs during a warm winter. Adults may overwinter in protected places.
Life Cycle
Complete with , larva, pupa, and stages. Specific details of stages unknown. Suspected that adults overwinter.
Behavior
Perches on bare ground to hunt prey. One observation of C. fallei (congeneric) documented on a small wolf spider (Pardosa), suggesting similar hunting in C. cristata. Courtship and mating have been observed in spring.
Ecological Role
, likely controlling of small arthropods in open field .
Similar Taxa
- Comantella pacificaOverlaps in general and humpbacked profile; distinguished by geographic range (British Columbia to Nevada and Utah) and subtle differences in antennal proportions and hair coloration
- Comantella rotgeriSimilar body plan and seasonal activity; separated by range (Colorado, New Mexico, Alberta) and morphometric differences in terminal style length
- Comantella falleiClosest geographic overlap with C. cristata in California; distinguished by specific hair coloration patterns and antennal segment proportions
More Details
Taxonomic status
The Comantella is considered to be in need of revision by asilid . Current -level identification relies on characters that may be variable or insufficiently diagnostic.
Seasonal ecology
The unusual bimodal seasonal pattern (early spring and late fall) is distinctive for the and may represent an to avoid competition with other predatory insects or to exploit specific prey availability periods.