Stauroneis acuta var. terryana (and six examples of Eunotia robusta) from Essex, Massachusetts. Large bubble in the mountant. Prepared by JA Long. Olympus BHB microscope using 450nm LED light. Stauroneis imaged using a 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. 11mm removed from the tube to the camera to increase the field of view. Monochrome converted Nikon d850 camera. 37 images stacked in Zerene (Pmax).
Stauroneis acuta var. terryana Tempère 1894. Published in: Cleve, P.T. (1894). Synopsis of the naviculoid diatoms. Part I. Kongliga Svenska Vetenskapsakademiens Handlingar Series 4 26(2): 1-194, 5 pls. Page 150. This name is currently regarded as a synonym of Stauroneis terryi D.B.Ward ex T.C.Palmer 1910. Published in: Palmer, T.C. (1910). Stauroneis terryi D.B. Ward. Proceedings of the Academy of Natural Sciences of Philadelphia 62: 456-459, 34 fig., 3 pl.. . Page 457, Plate XXXIV.