Fig. 3 in A new type of colony in Silurian (upper Wenlock) retiolitid graptolite Spinograptus from Poland

Fig. 3. Retiolitid graptolite Spinograptus tubothecalis sp. nov. rhabdosomes (A–D) showing thecal membranes (brown) and Spinograptus spinosus (Wood, 1900) (E, F) showing morphological details. A, B, D. Fragments of rhabdosomes from Prągowiec 2, Colonograptus deubeli Biozone. A. ZPAL G. 47/2, well preserved proximal end and three pairs of thecae obverse (A1) and reverse (A2) views, metasicula arrowed. B. ZPAL G. 47/3, tuboid distal theca arrowed. D. ZPAL G. 47/4, well preserved membranes and tuboid distal theca. C. Finite rhabdosome, holotype from Gołdap IG−1 borehole (1267.0 m), Colonograptus deubeli Biozone, ZPAL G. 47/1, obverse view with isolated distal theca (arrow). E. Spinograptus spinosus (Wood, 1900) from Gołdap IG−1 borehole (1250.0 m) Neodiversograptus nilssoni–Lobograptus progenitor Biozone, ZPAL G. 47/12, morphology of ventral wall. F. Spinograptus spinosus (Wood, 1900) from Jarosławiec K2, ZPAL G. 47/11, young rhabdosome, dotted lines show possible broken spines. Light microscope pictures (A–D), SEM pictures (E, F).