Pyramidalia Nalivkin 1947

Nalivkin 1957. Brachiopoda The Atlas of the guide forms of the fossil faunas of the U.S.S.R., The Atlas of the guide forms of the fossil faunas of the U.S.S.R. 3 : 1-245 56 pls. figs. Leningrad.", 1957: 1-245. Chapter pagination: 1-245