SEM external views of valves of Actinella kufferathiana sp. nov. from type material CCA 4379. A. Oblique view of an entire valve showing the largest part of the raphe on the mantle. B–C. Entire valve with the irregular placed areolae composing the striae. D. Detail of the head pole with one large spine (arrow), and short spines at the junction of the valve face and mantle showing those that are not broken (short arrow). E. Detail of the foot pole with a simple opening of the rimoportula on the pole valve mantle (arrow). F. Detail of the junction of the valve face and mantle showing the remnants of broken spines (arrows). Scale bars: A–C = 5 µm, D–F = 1 µm.