Fig. 6 in Colour patterns in Early Devonian cephalopods from the Barrandian Area: Taphonomy and taxonomy

Fig. 6. False colour pattern in Pseudorutoceras bolli Barrande, 1866. NM−L 449 from Praha−Hlubočepy, Dalejan, Daleje−Třebotov Formation, Třebotov Limestone. A. A part of the body chamber with original Barrande's inscription noticing "test", aperture up. B. The same specimen in opposite orientation, artificially abraded adapical part with wavy dark lines; ventrolateral view.