Atheroides hirtellus Haliday, 1838
upperside (left) and underside (from Wieczorek, 2009)
Apterae 2-3 mm, long-oval with very short legs and antennae, dorsally dark brown to black, ventrally yellowish. No host plant alternation. The live in small colonies in lengthwise rolled leaves, the tips of the leaves often coloured red.
References to Juncus articulatus probably are inaccurate.
Blackman & Eastop (2017), Heie (1982a), Lampel & Meier (2003), Nieto Nafría & Mier Durante (1998a), Stroyan (1977a), Wieczorek (2009a, 2010a).