Figure 3From: Molecular characterization and embryonic origin of the eyes in the common house spider Parasteatoda tepidariorum Markers for eye primordia at the final embryonic stages. (A) Confocal microscopy image of nuclear SYTOX® staining of a stage 14 embryo in frontal view. The primordia of the lateral eyes are visible as shallow pits in the head region (arrowheads). (B) Expression of Pt-peropsin at stage 14 marks not only the lateral eye primordia (white arrowheads) but also the median eye primordia (black arrowheads).Back to article page