†Heteromorphidion echinopillum Loeblich & Wicander 1976

Loeblich & Wicander 1976. Organic walled microplankton from the Lower Devonian Late Gedinnian Haragan and Bois d'Arc Formations of Oklahoma, U.S.A. Palaeontographica Abteilung B Palaeophytologie, 159(1-3) 1976: 1-39