Karklins 1983. Systematic descriptions for the suborder Ptilodictyina. Moore, R.C.; Robison, R.A.[Eds]. Treatise on invertebrate paleontology. Part G. Bryozoa revised. Volume 1. Introduction, order Cystoporata, order Cryptostomata., The Geological Society of America, Boulder, Colorado & the University of Kansas, Lawrence, Kansas, 1983: i-xxvi, 1-625. Chapter pagination: 489-529