Dolichopus alacer
Van Duzee, 1921
Dolichopus alacer is a of long-legged fly in the Dolichopodidae, described by Van Duzee in 1921. Members of this are predatory flies known for their elongated legs and metallic coloration. As with most Dolichopus species, males possess modified front with ornamental used in . The species is part of a highly diverse family with complex identification requirements.
Pronunciation
How to pronounce Dolichopus alacer: /dɔˈlɪkəpəs əˈleɪsər/
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Identification
-level identification of Dolichopus alacer requires examination of male genitalia, specifically the forward-protruding claspers and associated structures at the abdominal tip. Males of Dolichopus species generally possess specialized on the front that resemble tiny flags; these ornaments are visible without magnification. The Dolichopus is characterized by longer legs relative to body size compared to some related genera like Hydrophorus. Distinguishing D. alacer from depends on subtle morphological features of the male terminalia.
Behavior
Males perform complex courtship dances using their ornamented front to display to females. Members of the Dolichopus have been observed on water surfaces, where they prey on mosquito larvae and other small aquatic organisms. are continuously active, rarely pausing, which complicates observation and photography.
Similar Taxa
- Condylostylus speciesBoth are metallic dolichopodids frequently encountered in similar , but Condylostylus typically has shorter legs relative to body length and lacks the pronounced tarsal ornamentation of male Dolichopus.
- Hydrophorus speciesBoth occur on water surfaces, but Hydrophorus have proportionally shorter legs and are more specialized for skating across water surfaces compared to Dolichopus.
More Details
Taxonomic note
Dolichopus alacer was described by Van Duzee in 1921. The Dolichopus is one of the largest genera in Dolichopodidae, and -level relies heavily on male genitalic .