Drosophila ochrobasis
| Drosophila ochrobasis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Drosophila ochrobasis | ||||||||||||
| Hardy & Kaneshiro , 1968 |
Drosophila ochrobasis is a rare species of fly from the genus Drosophila within the fruit fly family. It is endemic to the island of Hawaii and was thought to be extinct between 1986 and 2006.
features
Both the body and the wings are 4.6 mm in length. The head is yellow in front and brown on top. The face is white with a protruding edge that runs down the middle. The thorax is yellow with one large brown spot on each side. The legs are yellowish with a brownish tinge. In the males, the basal three-fifths of the wings are predominantly clear to transparent with matt brownish horizontal stripes. The outer two thirds of the wings are dark brown with large brown, clear spots similar to those of the species Drosophila setosimentum . The females of Drosophila ochrobasis are almost indistinguishable from those of the species Drosophila setosimentum .
Habitat and way of life
Drosophila ochrobasis lives in semi-arid and moist forests. The larvae use plants of the genera Myrsine , Clermontia and Marattia as host plants.
Occurrence and status
Originally, Drosophila ochrobasis was widespread at altitudes between 1,189 and 1,615 m. The species was found in ten places on the four volcanoes Hualālai , Mauna Kea , Mauna Loa and Kohala . Between 1967 and 1975 there were sightings of this species almost every year, the most common with 135 occurrences between 1970 and 1974. After observing a single individual in 1986, expeditions to rediscover the species between 1995 and 1997 initially failed. however, the American entomologist Karl Magnacca managed to observe and photograph one male in 2006 and five more specimens in 2009 and 2010.
Systematics
The holotype of Drosophila ochrobasis was described in 1968 by Dilbert Elmo Hardy and Kenneth Y. Kaneshiro on the basis of a specimen that was collected in 1967 at an altitude of 1,692 m on Puu Hualālai on the island of Hawaii. Based on chromosomal studies, D. ochrobasis belongs to the species complex of Drosophila adiastola and is apparently most closely related to Drosophila setosimentum .
literature
- D. Elmo Hardy, Kenneth Y. Kaneshiro (1968): "New picture-winged Drosophila from Hawaii" University of Texas Publishing 6818, pp. 171-262.
Web links
- Endangered and Threatened Wildlife and Plants; Determination of Status for 12 Species of Picture-Wing Flies From the Hawaiian Islands
- Entry at Natureserve
Individual evidence
- ↑ Picture-wing fly (Drosophila ochrobasis). 5-year review summary and evaluation . US Fish and Wildlife Service Pacific Islands Fish and Wildlife Office, Honolulu, Hawaii, 2012
- ^ HL Carson, WE Johnson, PS Nair, and FM Sene: Allozymic and chromosomal similarity in two Drosophila species In: Proceedings of the National Academy of Sciences. Vol. 72, No. 11, pp. 4521–4525, November 1975 ( PDF, online )