Campsicnemus mirabilis   (Grimshaw)


 
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Koolau Spur-winged Long-legged Fly
(Campsicnemus mirabilis)

 
syn. Emperoptera mirablis (Grimshaw)

 
distribution:

Hawai'i Islands: O'ahu

 
local name: -

 
size: ca. 0,15 - 0,18 cm (length)

extinction date: shortly after 1900 (?)

 
The tiny Koolau Spur-winged Long-legged Fly is one of several wingless long-legged fly species, which can be found on the Hawaiian islands. Because of the rudimentary wings - they are reduced to about 0,01 cm long spurs - these species were temporary placed in their own genus (Emperoptera).

This species occured in the Ko'olau Mountains on the island of O'ahu, where it could be found in the leaf litter.

Big-headed Ants (Pheidole megacephala (Fabricius)), which were introduced to the Hawaiian Islands already in the 19th century, are accountable for the extinction of this, but also of many additional endemic insect species.

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All that still testifies of the former existence of this species, are three very poorly preserved specimens kept in the Bernice Pauahi Bishop Museum in Hawai'i's capital, Honolulu.

 
left:

Koolau Spur-winged Long-legged Fly (Campsicnemus mirabilis)


Depiction from: 'Fauna Hawaiiensis; being the land-fauna of the Hawaiian islands. by various authors, 1899-1913. Cambridge [Eng.]: The University press, 1913'

http://www.biodiversitylibrary.org

 
References:

- Neal L. Evenhuis: Review of flighless Dolichopodidae (Diptera) in the Hawaiian Islands. Bishop Museum Occasional Papers 53: 1-29. 1997
- Neal L. Evenhuis: Morphological and molecular evidence support the synonomy of Emperoptera Grimshaw with Campsicnemus Haliday (Diptera: Dolichopodidae). Records of the Hawaii Biological Suvery for 2008. Edited by Neal L. Evenhuis & Lucius G. Eldredge. Bishop Museum Occasional Papers 108: 35-44. 2010