| Acritarchs (microscopic, presumably eukaryotic cells that probably represent resting cysts of green algae) from the late middle Ordovician Kanosh Shale, western Millard County, Utah, a number of miles east of the eastern border of White Pine County, Nevada. Specimens: Top row, left to right: (1) Asteridium sp. ; (2) Digitoglomus minutum; (3) D. minutum; (4) Gorgonisphaeridium sp; (5) Micrhystridium stellatum. Second row--left to right: (6) Passalosphaera minuta; (7) Petaloferidium sp.; (8) Turpisphaera heteromorpha; (9) Turpisphaera heteromorpha. Third row--left to right: (10) Dictyotidium vietulum; (11) D. vietulum; (12) Melikeriopalla sp.; (13) Dicommopalla macadamii. Bottom row--left to right: (14) Dicommopalla; (15) Dicommopalla sp.; (16) Loeblichia heterorhabda; (17) L. heterorhabda. Scale bar is 10 microns long--0.00039 of an inch. Photograph courtesy Marco Vecoli, John H. Beck, and Paul K. Strother; I edited and processed the image through photoshop. |