Light micrographs showing the morphologies of living spionid larvae of genera Paraprionospio and Prionospio A, B Paraprionospio coora, lateral view of 25‐chaetiger (A) and 33‐chaetiger larvae (B) C, D Prionospio krusadensis, lateral view of 17‐chaetiger larvae E–G Prionospio membranacea, lateral view of 15‐chaetiger (E), 20‐chaetiger (F), and 24‐chaetiger larvae (G) H, Prionospio sp. 1, lateral view of 11‐chaetiger larva I Prionospio sp. 2, lateral view of 19‐chaetiger larva. Scale bars: 300 μm.

 
 
  Part of: Abe H, Sato‐Okoshi W (2021) Molecular identification and larval morphology of spionid polychaetes (Annelida, Spionidae) from northeastern Japan. ZooKeys 1015: 1-86. https://doi.org/10.3897/zookeys.1015.54387