Fig. 2 in The evolution of the mouthpart structures in the Eucraniini (Coleoptera, Scarabaeidae)

Fig. 2 Mouthparts in Eucraniini. a Ennearabdus lobocephalus head on ventral side (anterior part), scale bar = 0.5 mm. The epipharynx is visible after the labium, maxillae and mandibles were removed. The white arrow indicates the margin of the large, concave area where the epipharynx is housed, and kept in position by membranaceous laminae. CT clypeal tooth; Ac acropariae; Gy gymnopariae; Zy zygum, where the epipharyngeal tooth (ET) is placed; Ch chaetopariae; Ha haptomerum; Hp haptolachus. b Eucranium simplicifrons, mandibles, scale bar = 1 mm. c. Glyphoderus sterquilinus, left maxilla, scale bar = 1 mm. Pa maxillar palps; La lacinia; Ca cardo; St stipes; Ga galea. d. Glyphoderus sterquilinus, labium, scale bar = 1 mm