FIGURE 19 in Evolutionary significance of the retiolitine Gothograptus (Graptolithina) with four new species from the Silurian of the East European Platform (Baltica), Poland and Lithuania

FIGURE 19. Mature tubarium with appendix of Gothograptus obtectus Kozłowska-Dawidziuk, 1990 from the Bartoszyce IG- 1 core, depth 1677.5 m, lundgreni Biozone, Poland, ZPAL G.55/48. A. enlargement of distal part of specimen. B. enlargement of proximal end. C. whole specimen, reverse view. Abbreviations: lat. ap.—lateral apertural.