FIGURE 7 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 7. SEM pictures of nassa type genicular hoods of Gothograptus nassa Holm, 1890 and Semigothograptus meganassa (Rickards & Palmer, 2002). A–D. Semigothograptus meganassa, ZPAL G.54/1, 1649.2 m, Bartoszyce IG-1drill core, Poland, uppermost part of dubius/nassa Biozone, A. hood of th22 with marked surface bandages (arrow). B. enlargement showing pustules on parallel bandages (arrow), C. hood of th12 with marked space between bandages (arrow), D. hood of th32, surface bandages (arrow). E–H. Gothograptus nassa, Bartoszyce IG-1, 1655.8 m, dubius/nassa Biozone, E. whole hood of th32, irregular bandages arrowed, specimen ZPAL G.54/3. F–G. enlargement of hood, ZPAL G.54/9, F. showing pustules on parallel bandages (arrows), G. presenting edges of subjacent bandages (arrows). H. fragment of hood of mature specimen with thick layer of irregular bandages with distinctive pustules and parallel bandages (arrow), ZPAL G.54/6.