Opistognathus thionyi, CIUFES 2347, preserved holotype, 45.4 mm SL, male, Trindade Island, Brazil. Photograph by Zackary S. Randall.

 
 
  Part of: Smith-Vaniz WF, Tornabene L, Macieira RM (2018) Review of Brazilian jawfishes of the genus Opistognathus with descriptions of two new species (Teleostei, Opistognathidae). ZooKeys 794: 95-133. https://doi.org/10.3897/zookeys.794.26789