Fig. 4 in Kirkigraptus, a new retiolitid graptolite from Poland

Fig. 4. SEM micrographs of plectograptine retiolitid Kirkigraptus inexpectans gen. et sp. nov., Neodiversograptus nilssoni Biozone, Ludlow, Poland. A. Proximal end of fragment of specimen, oblique view, ZPAL G. 40/01; A1, oblique view, showing curved proxi−lateral lists; A2, thecal orifice, internal view. B. Fragment of rhabdosome with one side of thecae, ZPAL G. 40/03; B1, oblique view with seam on inside of lateral apertural rod; B2, proxi−lateral list, with pustular ornament on the exterior; B3, proxi−lateral lists looking proximally with seam (arrows). C. Fragment of lists showing socket, at junction of pleural list with genicular list (broken) and lateral apertural rod, ZPAL G. 40/05. D. Distal theca with last genicular list and thecal lip, ZPAL G. 40/02; D1, whole view; D2, external view of thecal lists, with two sizes of pustular ornament. E. Fragment of rhabdosome with lateral apertural list, geniculum and socket (arrowed), ZPAL G. 40/07.