Fig. 12 in Middle and Late Jurassic tube-dwelling polychaetes from the Polish Basin: diversity, palaeoecology and comparisons with other assemblages

Fig. 12. Serpulidae sp. 1 from the Jurassic of Poland. A. Serpulidae sp. 1 and a tiny Glomerula gordialis (Schlotheim, 1820) (arrowed) encrusting a shell fragment from the upper Bathonian–lower Callovian of Bolęcin (GIUS 8-3745/4); top (A1) and lateral (A2) view; A2 shows a flattened shape of the tube. B. Serpulidae sp. 1 and a tiny, presumably juvenile Filogranula runcinata (Sowerby, 1829) (above, arrowed) encrusting a shell fragment from the Callovian of Zalas (GIUS 8-3589/16). Scale bars 1 mm.