FIGURE 1. Map illustrating the exposure of the Ordovician in Estonia and location of studied localities. 1- Saxby North, 2- Saxby, 3- Hosholm, 4- Paluküla, 5- Vohilaid, 6- Sutlema.
FIGURE 2. Stratigraphy of the upper Katian of NW Estonia. Occurrence of endobionts indicated with asterisk.
FIGURE 3. A, Cornulites sp. (Corn) and Chaetosalpinx isp. (Chaet) in Protoheliolites norvegicus from the Adila Formation, Hosholm, Vormsi Island (GIT 840-35). Note the downward-bending lamellae of Protoheliolites norvegicus in the upper half of the bioclaustration. B, Cornulites sp. in stromatoporoid from the Kõrgessaare Formation, Saxby North, Vormsi Island (GIT 529-95-2). C, Lingulate in Propora sp. from the Kõrgessaare Formation, Saxby North, Vormsi Island (GIT 520-155-2). D, Lingulate Rowellella sp. in Diplotrypa densitabulata from the Kõrgessaare Formation, Saxby North, Vormsi Island (GIT 843-15-1).
FIGURE 4. Chaetosalpinx -like bioclaustration in Diplotrypa densitabulata from the Kõrgessaare Formation, Saxby North, Vormsi Island (GIT 843-31). Arrows point to the bioclaustration.
