Fig. 4From: A new species of Hypselaster (Echinoidea, Spatangoida) from the Middle Eocene Midawara Formation of the Eastern Desert, EgyptApical disc of Hypselaster strougoi n. sp., ethmolytic with two large, circular genital pores (G1 and G4). a apical disc of specimen SUSGM 018-10-164 (paratype 2; see Pl. 1, Fig. 5); b camera-lucida drawing of plating of A; ocular plates are white, genital plates light grey, with pores shown in blackBack to article page