Whittaker, J. E.; Jones, R. W.; Banner, F. T. (1998). Key Mesozoic Benthic Foraminifera of the Middle East. The Natural History Museum of London. 1-236. Pl. 10, figs 1-3 Fissoelphidium operculiferum Smout, 1955. 1a-c, Holotype, BMNH no. P 42155, close-up of aperture (x100), edge and side views (x40), respectively. 2a, b, Paratype (uncatalogued specimen), side and edge views, x50. 3a-c, Paratype (uncatalogued specimen), side view (x50), and two detailed views showing, respectively, the deeply fissured sutures (x135) and part of slitlike aperture on broken last chamber (x270).
