Figure 3. Rubber casts of the bored surfaces of the boulders. (1) INGUJ214P/SZG1; (2) INGUJ214P/SZG2. S1a–t and S2a–f=the type material of Spirolites radwanskii n. igen. n. isp. Gc=Gastrochaenolites cf. G. cluniformis, Go = Gastrochaenolites ?orbicularis, Gt=Gastrochaenolites torpedo.