Embryonic development of Apachyus chartaceus (Apachyidae), DAPI staining, UV-excitation, fluorescence microscopy. Lateral view, anterior to the top, ventral to the left. A Stage 1. B Stage 2. C Middle Stage 3. D Late Stage 3. E Stage 4. F Early Stage 5. G Late Stage 5. H Middle Stage 6. I Early Stage 7. J Late Stage 7. K Early Stage 8. L Late Stage 8. M Stage 9. – Abbreviations: Ab – abdominal region / abdomen; Am – amnion; An – antenna; Bd – blastoderm; Ce – cercus; CN – cleavage nucleus; DDC – definitive dorsal closure; EA – embryonic area; EEA – extraembryonic area; Em – embryo; Gn – gnathal region; HC – head capsule; HL – head lobe; LP – lateral plate; Md – mandible; MxP – maxillary palp; Pce – protocephalon; Pco – protocorm; PDC – provisional dorsal closure; SDO – secondary dorsal organ; Se – serosa; SYN – secondary yolk nucleus; Th – thoracic region / thorax; Th2 – 2nd thoracic segment; Th1L–3L – 1st to 3rd thoracic legs; I–XI – 1st to 11th abdominal segments. – Symbols: black arrowhead – anterior end of embryo; white arrowhead – posterior end of embryo. – Scale bar: 500 μm.