Holopeidae†Holopeidae is an extinct family of paleozoic gastropod mollusks. These molluscs were stationary epifaunal suspension feeders.This family is unassigned to superfamily. This family has no subfamilies.GeneraGenera in the family Holopeidae include: Cyclora Eopagodea Holopea J. Hall, 1847 Pachystrophia Perner, 1903 Ptychonema Perner, 1903 Raphistomina Ulrich & Scofield, 1897 Sinutropis Perner, 1903 but in family Euomphalidae Umbospira Perner, 1903