Electrophorus varii , sp. nov. de Santana, Wosiacki, Crampton, Sabaj, Dillman, Mendes-Júnior and Castro e Castro Holotype: MPEG 25422, 1000 mm TL; Goiapi River, Marajó Island, Pará, Brazil. Paratypes: INPA 46378, INPA 46379 (3); MHNG 2748.083; MPEG 30480 (3). Etymology: In honor of Richard Peter Vari (1949–2016) for his contributions to ichthyology. Diagnosis: Eleven nucleotides in COI: A(64), A(80), G(146), G (164), T (190), A(251), A(467), C(512), T (517), A(536), and C (569). Pectoral-fin rays 20–28 and lateral-line pores 124–186 (versus 32–38, and 88–101, respectively, in E . electricus ). Distinguished by head narrow, Fig. 2a (versus wide, Fig. 2b, in E . voltai ; distance between medial margins of contralateral dentaries at transverse through last two ventral pores 2–3 times shorter in E . varii than E . voltai , Fig. 2a, b), skull deep, cleithrum lies between vertebrae 1 and 2, Fig. 2b (versus skull depressed, cleithrum lies between vertebrae 5 and 6, in both E . electricus and E . voltai Fig. 2a, c). ... : Published as part of de Santana, C. David, Crampton, William G. R., Dillman, Casey B., Frederico, Renata G., Sabaj, Mark H., Covain, Raphaël, Ready, Jonathan, Zuanon, Jansen, de Oliveira, Renildo R., Mendes-Júnior, Raimundo N., Bastos, Douglas A., Teixeira, Tulio F., Mol, Jan, Ohara, Willian, Castro, Natália Castro e, Peixoto, Luiz A., Nagamachi, Cleusa, Sousa, Leandro, Montag, Luciano F. A., Ribeiro, Frank, Waddell, Joseph C., Piorsky, Nivaldo M., Vari, Richard P. & Wosiacki, Wolmar B., 2019, Unexpected species diversity in electric eels with a description of the strongest living bioelectricity generator, pp. 1-10 in Nature Communications 10 (4000) on page 6, DOI: 10.1038/s41467-019-11690-z, http://zenodo.org/record/3405402 ...