Actinoptychus heliopelta Grunow (1883)
Comment: Large valve with 8 sectors and a rhomboid central area. Note there is a faint hyaline ray projecting from each corner of the central area.
Locality:
Toamasina, Madagascar, The Natural History Museum slide BM coll. Adams TS451 (Holocene).
Photographed using: Zeiss Axioplan, Plan-NEOFLUAR 20×/0.5 + Zeiss AxioCam MRc. Stacked using Adobe Photoshop CS6.
Direct link to this page: https://fossil-diatoms.com/entry/170