Tortopsis toro sp. nov., nymph. 7, labrum, dorsal view; 8, left mandible, inner view, 9, right mandible, inner view; 10, right mandible, detail of tusk, ventral view (arrow indicates stout spine near inner margin); 11, hypopharynx, dorsal view; 12, labium, ventral view; 13, left maxilla, ventral view (arrow indicates membranous gill); 14, right maxilla, ventral view.

 
 
  Part of: Molineri C, Dias LG, Zúñiga MC (2021) New insights into the phylogeny of Tortopus Needham and Murphy and Tortopsis Molineri (Ephemeroptera, Polymitarcyidae) with description of three new species. Arthropod Systematics & Phylogeny 79: 151-170. https://doi.org/10.3897/asp.79.e62735