FIGURE 4 in A new generic name, Semigothograptus, for Gothograptus? meganassa Rickards & Palmer, 2002, from the Silurian post- lundgreni Biozone recovery phase, and comparative morphology of retiolitids from the lowermost upper Homerian (upper Wenlock)

FIGURE 4. Comparison of the main structures of tubaria used in this study. A. Papiliograptus papilio Lenz & Kozłowska- Dawidziuk, 2002, Šiupyliai-69 borehole, Lithuania; B. Semigothograptus meganassa (Rickards & Palmer, 2002), ZPAL G.54/ 1, Bartoszyce IG-1 drill core, depth 1649.2 m; C-D. Gothograptus nassa Holm, 1890, C. young colony, reverse side, ZPAL G.54/4, Bartoszyce IG-1 drill core, depth 1656.8 m, D. mature colony with broken distal end, obverse side, ZPAL G.54/5, Bartoszyce IG-1 drill core, depth, 1655.8 m. Scale 1 mm for all pictures. Abbreviations: anc.—ancora, sl.—sleeve, umbr.— umbrella.