FIGURE 13 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 13. Mature tubaria of Gothograptus auriculatus n. sp., Bartoszyce IG-1 core, depth 1645.2 m, praedeubeli Biozone, Poland. A. lateral-ventral tubarium aspect with six pairs of thecae, with the distal end broken off, ZPAL G.55/22. B. obverse side of tubarium with proximal end, holotype, ZPAL G.55/23. C, F. reverse views of distal fragments with six pairs of thecae and appendix, paratype ZPAL G.55/24; C. whole specimen; F. enlargement of distal part showing thick lists and auricle. D. part of tubarium with proximal end, reverse view, ZPAL G.55/25. E. ventral view of distal part of tubarium with beginning of appendix, ZPAL G.55/26.