Fig. 8
From: The development of the adult nervous system in the annelid Owenia fusiformis
Neuropeptide-lir elements in the juveniles. CLSM images of DAPI (cyan) and neuropeptide-lir (red or white) elements in juveniles (> 4 wpf). a, c, e, g Ventral views; b, d, f, h lateral views, with anterior to the top. The brain connects with the ventral nerve cord (vnc), via circumesophageal connectives (lateral medullary cords [22] at the trunk thorax, made out of three ciliated thoracic segments (cts). Iterated a–b FVamide-lir, c–d RYamide-lir and g–h MIP-lir neurons and lateral transverse nerves (ln) are present in the segments of the trunk. e–f RWG labels the parapodial glandular organs (pgos). Double yellow line marks the division between thoracic and abdominal segments. br: brain; cc: circumesophageal connectives; cts: ciliated thoracic segments; lmc: lateral medullary cords; lml: lower mouth lip; mo: mouth; mt: mucous tube; pgo: parapodial glandular organ 1–4; vnc: ventral nerve cord