Fig. 7

Selkirkia transita sp. nov. from the early Cambrian Chengjiang Lagerstätte: tube and eggs. a–c ELI-0000604, broken tube showing annulations along its external (ridges) and internal surface (furrows). d, e ELI-0000605, showing annulations (tiny ridges) along the external surface of the tube; general view and close-up (white arrow indicates irregularities in annulated pattern). f–h, ELI-0000606, showing egg clusters inside the tube; note marked differences with pellet-like gut contents; elemental maps of two eggs (see location in g; note enrichment in carbon). Abbreviations: exa, external annulation (ridges); gc, gut contents; ina, internal annulation (furrows); oo, possible ooctyes. Scale bars represent a, d and f 5 mm; b, c, e and g 1 mm; h 100 μm