Fig. 2: The stalked eyes of Pygmaclypeatus daziensis8.
From: Pygmaclypeatus daziensis, a unique lower Cambrian arthropod with two different compound eye systems
a YKLP 13929 (specimen also published in ref. 82, Fig. 20.28b) Yellow circles: protruding stalked compound eyes, white circles: dorsal compound eyes. b YKLP 13929 without interpretative drawings. c1 The compound eye of c2 Artemia salina99, a primordial crustacean (Branchiopoda), about 100 mya37, and possibly with a similar appearance as the Cambrian compound eyes with globular facets. Here the crystalline cone forms the spherical lens. d YKLP 13,928 (photo of the specimen from82, Fig. 20.28a). e Anterior region of the cephalon of (d). Arrows indicate supposed stalked eyes shining through the translucent shell. f Dorsal compound eye of (d). g, f with interpretative drawing. h YKLP 13,930 (photo of the specimen from ref. 82, Fig. 20.28c). i Anterior region of (h), the white arrow indicates a dorsal compound eye, slightly distorted; the yellow arrow indicates a ventral staked compound eye, shining through the shell. j Compound eye of h), slightly distorted. k Interpretative drawing of (j). l Ventral articulated stalked compound eye. m, l with interpretative drawing. Copyrights were obtained for a–m.
