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Muellerianella fairmairei
Family: Delphacidae

A small genus of three UK species with similar colouring involving a paler central area and darker sides (also present strikingly in nymphs). The species are best distinguished by the male genitalia.

The male genital segment is only shallowly incised posteriorly, in side view, and the parameres are narrower than in M. extrusa. In addition to the genitalia, M. brevipennis reportedly differs from the more local M. brevipennis in that there are dark mottles along the leading edge of the eye (below). It is unclear how reliable this is, and the genitalia should always be checked. Macropters also occur.

A common species found in damp locations across the UK, usually in damp areas such as ditches, where it feeds on Tussock Grass (Deschampia caespitosa).


Adult: June to October
Length 2.5-4 mm
Muellerianella fairmairei
Adult female: Dorset (September 2009) ©Steve Tomlinson

Muellerianella fairmairei
Muellerianella fairmairei
Adult male: Dorset (September 2009) ©Steve Tomlinson
Adult male: Dorset (September 2009) ©Steve Tomlinson
Muellerianella fairmairei Muellerianella fairmairei
Adult macropter: Huddersfield (June 2009) ©Joe Botting
Nymph: Huddersfield (June 2009) ©Joe Botting