Figure 1. Karlsorus gothlandicus (Lebedev, 1892) n. comb., Slite beds, upper Wenlock, Gotland. (1–5), LMG 5939, dorsal, ventral, lateral, posterior, and anterior views of nearly complete shell, labeled as from “Visby Norderstrand,” which is most likely erroneous because this locality, once located outside Visby but now lost (see Jaanusson, 1986), was in the Visby Marl (Llandovery), which is much lower than the known stratigraphic range of Karlsorus gothlandicus n. comb. on Gotland. This well-preserved shell is most likely derived from Lilla Karlsö. (6–8) LMG 5940, dorsal valve embedded in lime-mud matrix, from the Valle 1 and 2 sections (see Laufeld, 1974, p. 140), showing brachiophorium in anterior (7) and lateral (8) views. (9–11) Br 143013, one small slab from Tjerldersholm 1 coastal bluff, with disarticulated ventral valves (9) and a dorsal valve showing the fused outer hinge plates in their middle portion (10, 11).
