Male of the Amazon River Prawn, Macrobrachium amazonicum, collected in São Francisco river, northeast Brazil. Scale bar: 1 cm.

 
 
  Part of: Santos LVR, Coelho Filho PA (2021) An update of the amazon prawn (Macrobrachium amazonicum) distribution in the low course of the São Francisco river (northeast Brazil). Neotropical Biology and Conservation 16(1): 105-114. https://doi.org/10.3897/neotropical.16.e58895