Holotype of Prognathodes geminus in its natural habitat at a depth of 116 m off Ngemelis, Palau. Photograph by JL Earle.

 
 
  Part of: Copus JM, Pyle RL, Greene BD, Randall JE (2019) Prognathodes geminus, a new species of butterflyfish (Teleostei, Chaetodontidae) from Palau. ZooKeys 835: 125-137. https://doi.org/10.3897/zookeys.835.32562