arua, Apistogramma Römer [U.] & Warzel [F.] 1998:46, Figs. 1-2, 5-6, 9-10 + 1-4 (back) [aqua, Journal of Ichthyology and Aquatic Biology v. 3 (no. 2); ref. 23583] Some 2.5 kilometers upstream of village of Arua in a small right-bank affluent of Rio Arua, tributary of Rio Arapiuns, Para State, Brazil, about 2°39'27"S, 55°43'24"W. Holotype: MZUSP uncat. Paratypes: ZFMK 18599 (1), 18601 (1), 18605 (1). Type catalog: Herder et al. 2010:127 [ref. 31087]. •Valid as Apistogramma arua Römer & Warzel 1998 -- (Römer et al. 2003:28 [ref. 26768], Kullander in Reis et al. 2003:612 [ref. 27061], Staeck 2003:16 [ref. 27488], Römer et al. 2012:191 [ref. 32047], Staeck 2017:36 [ref. 35639]). Current status: Valid as Apistogramma arua Römer & Warzel 1998. Cichlidae: Cichlinae. Distribution: Amazon River basin, Brazil. Habitat: freshwater.