Morphology and development of eggs laid by P. rugosus queens. Reproductive egg general morphology (A), with embryonic development at approximately 25 hours (B) and 65 hours (C). In trophic eggs (D), there is no embryonic development at 25 hours (E) nor at 65 hours (F). Panels B, C, E, F represent fluorescence images with DAPI-counterstained nuclei.