Larval morphology (head and mandibular tusk) A Potamanthus formosus Eaton, 1892 B Rhoenanthus magnificus Ulmer, 1920 C R. obscurus Navás, 1922 D angle measurement of mandibular tusk E R. distafurcus Bae & McCafferty, 1991 F R. speciosus Eaton, 1881.

 
 
  Part of: Kwanboon S, Sartori M, Boonsoong B (2021) Behningiidae and Potamanthidae (Insecta, Ephemeroptera) in Thailand. ZooKeys 1067: 57-82. https://doi.org/10.3897/zookeys.1067.72779