A flea beetle, Distigmoptera borealisBlake, 1943, is documented for the first time to feed on liverworts, Reboulia hemisphaerica (L.) Raddi (Aytoniaceae), and moss, Weissia controversa Hedw. (Pottiaceae). This is the first and only known bryobiont leaf beetle in the USA and Nearctic biogeographic region. The adult of D. borealis is redescribed and illustrated, and the larva and pupa of D. borealis are described and illustrated for the first time.
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Vol. 73 • No. 3