Fig. 16 in Rhagasostoma (Bryozoa) from the Late Cretaceous of Eurasia: taxonomic revision, stratigraphy and palaeobiogeography

Fig. 16. Rhagasostoma rowei (Brydone, 1906). A–B. Late Cretaceous, Ulyanovsk Region, Russian Federation. A. PSM PSU 2/187, this specimen, which is the original figured by E. Eichwald (1868: pl. 8, fig. 9) as Eschara volgensis Eichwald, 1865, could not be traced but is represented by this photograph taken by E. Voigt in 1963; overview of part of erect bifoliate colony showing autozooids and avicularia. B. MMI 15/49, the specimen from Yazykov, which is the original figured by I.I. Lahusen (1873: pl. 4, fig. 4) as Eschara volgensis Eichwald, 1865; overview of erect bifoliate stem-like then dichotomously branching colony. C–G. Early Maastrichtian (Ostrea lunata Zone), Trimingham, Norfolk, England, UK. C. Holotype, SM B36113, overview of erect bifoliate stem-like then dichotomously branching colony. D–E. Paratype, SM B36260. D. Overview of fan-like part of bifoliate colony. E. Autozooids and avicularia. F–G. SM B36697, specimen labelled as O. mimosa from the Brydone Collection. F. Overview of erect bifoliate stem-like then dichotomously branching colony. G. Non-ovicellate and two ovicellate (in the left lower corner) autozooids and avicularia. H. 2922/204, from an erratic block of?late Campanian age in a quarry near Hrodna/Grodno (Гродна/Гродно), Grodno Region, Belarus, view of undersides of zooidal frontal walls. Scale bars: A–B without scale bars; C–D, F = 1 mm; E, G = 200 µm; H = 300 µm.