Thomson, JW 1987: The lichen genera Catapyrenium and Placidiopsis in North America. - The Bryologist90: 27-39. [RLL List # 131 / Rec.# 18497] Keywords: CATAPYRENIUM/ DERMATOCARPON/ NEW TAXA/ KEY/ ENDOPYRENIUM/ VERRUCARIACEAE/ NORTH AMERICA/ PLACIDIOPSIS
Abstract: 21 figures. [Recognition of 12 species of Catapyrenium and two of Placidiopsis for North America; keys. New: Catapyrenium acarosporoides (A. Zahlbr.) comb. nov., C. caeruleopulvinatum sp. nov., C. granulosum (B. de Lesd.) comb. nov., C. heppioides (Zahlbr.) comb. nov., C. plumbeum (B. de Lesd.) comb. nov., C. squamellum (Nyl.) comb. nov., C. tuckermanii (Rav. ex Mont.) comb. nov., and C. zahlbruckneri (Hasse) comb. nov. Placidiopsis cervinula is reported for the first time from North America.]