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Trapezonotus arenarius
Family: Lygaeidae

Trapezonotus species are medium sized ground bugs which are rather oval in shape. The sides of the pronotum are regularly rounded and thinned at the edges to produce narrow keels.
 
T. arenarius was previously considered conspecific with T. desertus and T. dispar, and the three species are often very difficult to separate, ideally requiring examination of the male parameres. The mid and hind tibiae are usually black in T. arenarius. Although both macropterous and brachypterous forms occur, the wing membranes are often well-developed in brachypters and show a large degree of overlap.

Widespread but mainly coastal throughout much of the UK, associated with sand dunes and the east anglian brecks.

Adult: All year
Length 4.0-4.5 mm
 Trapezonotus arenarius
Adult: north Wales (August 2008) ©Tristan Bantock
Trapezonotus arenarius Trapezonotus arenarius
Adult: north Wales (April 2009) ©Tristan Bantock

 Adult: north Wales (August 2008) ©Tristan Bantock
Trapezonotus arenarius Trapezonotus arenarius
Adult: north Wales (August 2008) ©Tristan Bantock

 		Nymph: north Wales (August 2008) ©Tristan Bantock