Efferia harveyi

(Hine, 1919)

Harvey Hammertail

Efferia harveyi is a of assassin ( ), commonly known as the Harvey Hammertail. Originally described as Erax harveyi by Hine in 1919, it was later transferred to the Efferia. Like other members of the Asilidae, this species is a predatory fly. The 'Harvey Hammertail' refers to the clubbed or expanded tip characteristic of many Efferia species. The species has been documented in at least 25 observations on iNaturalist.

Pronunciation

How to pronounce Efferia harveyi: /ˈɛfɛriə ˈhɑːrveɪaɪ/

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Identification

Members of the Efferia can be distinguished from other genera by the clubbed or expanded male terminalia, which gives rise to the 'hammertail' . -level identification within Efferia requires examination of genitalic structures and other subtle morphological features. Efferia harveyi was originally described in the genus Erax and later transferred to Efferia based on revised generic concepts.

Ecological Role

As a member of the (assassin ), Efferia harveyi functions as an aerial of other . The is known for preying on a wide variety of insects including , , , , other flies, and some .

Similar Taxa

Other Efferia speciesMany Efferia share the characteristic clubbed and similar overall body plan, requiring careful examination of genitalic structures and other fine morphological details for definitive identification.
Erax speciesEfferia harveyi was originally described in the Erax; these genera have been subject to taxonomic revision, and some may appear superficially similar.

More Details

Taxonomic History

Originally described as Erax harveyi by Hine in 1919, this was subsequently transferred to the Efferia. The genus Efferia has undergone significant taxonomic revision, with many species formerly placed in Erax.

Common Name Origin

The 'Harvey Hammertail' combines the specific epithet (harveyi, presumably honoring someone named Harvey) with the 'hammertail' descriptor referring to the clubbed characteristic of the .