Fig. 6

a Scanning electron micrograph of the cribellate spigots in N. albofasciata. The cribellate spigots are composed of five tubal segments with four thicker regions which will provide the characteristic pearling node of the cribellate threads. b Diagram of the cribellate spigot which composed of five tubal segments with for thicker regions. c Photo micrograph of the cribellate silk line. Each silk line has a unique outer morphology resembling the segmented insulators since the silk filaments are spun out from the spigot by the rapid hackling. Scale bar indicates 0.5 μm