Hayward, B. W., Kawagata, S., et al. 2012. The Last Global Extinction (Mid-Pleistocene) of Deep-sea Benthic Foraminifera (Chrysalogoniidae, Ellipsoidinidae, Glandulonodosariidae, Plectofrondiculariidae, Pleurostomellidae, Stilostomellidae), Their Late Cretaceous-Cenozoic History and Taxonomy. 43 129, plate 7 figs. 20-22.