Figure 5. A–G in The exceptionally well-preserved Sauropleura scalaris (Nectridea: Urocordylidae) from the late Carboniferous of the Czech Republic: new information on ontogeny, lateral line and tail

Figure 5. A–G, Sauropleura scalaris (Frič, 1875), ÚGV PAL00158, dentary in labial view, showing the pits and grooves of the lateral line system. A, imprint of the labial surface of the dentary, showing the entire lateral line system. B–D, close-up images of the lateral line pits and grooves. E–G, electron microscope images of the three anterior-most pits in the dentary. H, I, specimens referred to S. scalaris, showing the lateral line system on the imprint of the labial surface of the dentary. H, NMP M860. I, NMP M394. Arrowheads mark the distinctive morphology of the lateral line system on the dentary: blue colour corresponds to round-ovate pits in the anterior portion of the bone, yellow colour represents slightly elongated groove in the dentary middle part, and red colour corresponds to elongated groove in the posterior portion of the dentary. Scale bar: 1 mm in A, H, I; 250 µm in B–D; and 50 µm in E–G.