gracilis, Creagrutus Vari [R. P.] & Harold [A. S.] 2001:111, Fig. 44 [Smithsonian Contributions to Zoology No. 613; ref. 25842] Río Santiago, at La Poza, 4°01'S, 77°47'W, Provincia Condorcanqui, Amazonas, Peru. Holotype: LACM 41724-27. Paratypes: LACM 41724-32 (10); MUSM 8864 (10), 10760 (6); USNM 341370 (10, 2 c&s), 344534 (4). •Valid as Creagrutus gracilis Vari & Harold 2001 -- (Vari & Harold in Reis et al. 2003:123 [ref. 27061], Mirande et al. 2013:763 [ref. 33366], Barriga Salazar 2014:107 [ref. 35745], Thomaz et al. 2015:Add. 5 [ref. 33893], Meza-Vargas et al. 2021:18 [ref. 39298]). Current status: Valid as Creagrutus gracilis Vari & Harold 2001. Stevardiidae: Creagrutinae. Distribution: South America: Amazonas and Loreto States (Peru), and various localities along eastern slobe of Andean Cordilleras in Ecuador (Ecuador and Peru). Habitat: freshwater.