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Fig. 8 | BMC Evolutionary Biology

Fig. 8

From: The functional head of the Cambrian radiodontan (stem-group Euarthropoda) Amplectobelua symbrachiata

Fig. 8

Mouth plates of A. symbrachiata. a, close-up of the mouth region of YKLP 13889. b, close-up of the left row of tuberculate plates (boxed in a, orientation rotated by 180°), arrows indicating the large spines along the outer edge of the plates. c, close-up of the middle row of tuberculate plates (boxed in a) numbered 1–6. d, close-up of the right row of tuberculate plates, note the posteriorly pointed large spine at the posterior corner (star), arrows indicating spines along the outer edge. e, close-up of the rectangular tuberculate plate (boxed in c, rotated 180°), star showing the backwards pointed large spine at the posterior corner. See Methods for abbreviations. Scale bars: a, 5 mm; b-e, 2 mm

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