Fig. 3

Confocal maximum projections of everted G. tridactyla pharynges cut into two halves. Anti-GLTx staining (glow-mode) and phalloidin–rhodamine counterstaining (blue). Arrows indicate GLTx-IR staining. a Distinct GLTx-IR staining occurs in clearly defined pharyngeal lobes. Note there is no additional staining inside other pharyngeal tissues. b Anti-GLTx staining revealed a radial color pattern that is most prominent at the base and appears faint in apical parts of the lobes. c–d A network of duct-like structures (which we refer to as ducts) connects and transports the GLTx from the pharyngeal lobes to the teeth. Through a series of pores the venom is delivered. Scale bars: 100 μm (a–d)