Guerstein et al., 2005
From dinoflaj3
Guerstein, G.R., Junciel, G.L., Guler, M.V. and Daners, G., 2005: Diconodinium lurense sp. nov., a late Maastrichtian to Danian dinoflagellate cyst from southwest Atlantic basins. Ameghiniana, v.42, no.2, p.329-338.