Fig. 1
From: The functional head of the Cambrian radiodontan (stem-group Euarthropoda) Amplectobelua symbrachiata
Functional head region of Amplectobelua symbrachiata. a, YKLP 13889, showing paired frontal appendages, gnathobase-like structures and mouth plates preserved together. b, interpretative drawing. c, close-up of small tubercles (boxed in a) on podomeres 2 and 3. d, close-up of small spines branched from the inner (ventral) medial-edge of podomere 8 (boxed in a). See Methods for abbreviations. Scale bars: a, b, 1 cm; c, d, 0.5 mm