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This genus was created by Edwards in 1932.
Of the seven extant subgenera of Anopheles, Stethomyia appears to be the earliest diverging clade.
This branching order is currently under examination and may be revised.
The species in this subgenus are forest mosquitoes and to date have been poorly studied. Larvae and pupal forms have been found in shaded marshy and swampy areas along streams within forests. Adult females are known to feed on humans.
- Widely separated seta 2-C
- The long pleural setae have thorn-like branches on one side only
- Abdominal setae 1 are vestigial or absent
- Anterolateral spiracular lobes have a narrow finger-like process
- Spiracles are prominent and widely spaced
Pupae do not seem to bear subgeneric characters.
They have a median longitudinal silvery stripe on the scutum and lack prealar setae.
None of the species in this genus transmit malaria.
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