Phimodera humeralis is a small mostly European shield-backed bug in the tribe Phimoderini. Although occasionally seen in northern Europe, its primary range is southern Europe.
The imago stage measures 5mm7mm and ranges in colour from sandy ochre to pale brown.
Phimodera humeralis is found in sparsely vegetated dune terrain on heaths and sandy hills, living on and especially in the sand around Carex arenaria, a 10–40 cm-high grass. P. humeralis is difficult to see, as from a distance they look like small light gray stones.
Adult (imago) P. humeralis hibernate through winter and mate in the spring. The mating takes about 10–15 minutes.The nymphs are 2.5to and are usually found on the C. arenaria grass plants during June and July.
Phimodera humeralis is considered an endangered species, especially in northern Europe.