Hydrothassa glabra is a Europe species of leaf beetle in the family Chrysomelinae
Hydrothassa glabra grows to 3 - 4mm in length and are dark metallic blue and orange-yellow in colour.[1] The elytra is coloured orange-yellow with lateral margins. It may be confused with H. marginella or H. hannoveriana.
H. glabra is a widespread species, It has various host plants, particularly buttercups. Creeping buttercup and meadow buttercup' are especially prevalent as host plants.[2] Adults overwinter in grass tussocks.
H. glabra is prevalent in central and northern Europe,[3] with a widespread and scattered distribution in the United Kingdom.[4]