Study area. Buenos Aires and Tronco creeks in Maranhão, Brazilian Amazon Coast.

 
 
  Part of: Ribeiro RP, Alves PR, Almeida ZS, Ruta C (2018) A new species of Paraonis and an annotated checklist of polychaetes from mangroves of the Brazilian Amazon Coast (Annelida, Paraonidae). ZooKeys 740: 1-34. https://doi.org/10.3897/zookeys.740.14640