Actinoptychus amblyoceros (spelt ambyloceros on the slide) from Maryland, USA. Also has the name Schuettia. Single example on the slide. Prepared by Dingley P Fuge. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 60 images stacked in Zerene (Pmax).
Actinoptychus amblyoceros (Ehrenberg) A.W.F.Schmidt 1874. Published in: Schmidt, A.[W.F.] (1874). Atlas der Diatomaceenkunde. Series I, Heft 1. pp. pls 1-4. Aschersleben: [Verlag von Ernst Schlegel]. Plate 1, Figure 25. This name is currently regarded as a synonym of Symbolophora amblyoceros (Ehrenberg) G.R.Hasle & P.A.Sims. One of the other names it is known as is Schuettia amblyoceras (Ehrenberg) De Toni 1894.