Stauroptera tuscula from Leghorn (presumably Livorno, Italy, traditionally known in English as Leghorn, and known for fossil diatoms). Single example on the slide. Fossil freshwater material. Mounted in Hyrax. Prepared by Flatters and Garnett Ltd. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 45 images stacked in Zerene (Pmax). Oblique view. Dipping down towards the right.
Stauroptera tuscula (Ehrenberg) Ehrenberg, 1854. Published in: Ehrenberg, C.G. (1854). Mikrogeologie. Einundvierzig Tafeln mit über viertausend grossentheils colorirten Figuren, Gezeichnet vom Verfasser. pp. [1]-31, 40 pls [Taf. I-XXXX]. Leipzig: Verlag von Leopold Voss. Plate 6/1, Figure 13a-b. This name is currently regarded as a synonym of Aneumastus tusculus (Ehrenberg) D.G.Mann & Stickle, 1990. Published in: Round, F.E., Crawford, R.M. & Mann, D.G. (1990). The diatoms. Biology and morphology of the genera. pp. [i-ix], 1-747. Cambridge: Cambridge University Press. Page 663. Homotypic synonyms: Navicula tuscula Ehrenberg 1840, Stauroptera tuscula (Ehrenberg) Ehrenberg 1854, Schizonema tusculum (Ehrenberg) Kuntze 1898, Clevia tuscula (Ehrenberg) Mereschowsky 1903, Mastogloia tuscula (Ehrenberg) Hajós 1973. Heterotypic synonyms: Pinnularia tuscula Ehrenberg 1840, Stauroneis punctata Kützing 1844, Stauroptera punctata (Kützing) Rabenhorst 1853, Stauroneis tuscula (Ehrenberg) Ralfs 1861, Navicula punctata (Kützing) Donkin 1871, Navicula tuscula (Ehrenberg) Grunow 1880.