calvinoi, Titanolebias Alonso [F.], Terán [G. E.], Serra Alanís [W. S.], Waldbillig [M. M.], Montes [M. M.], Bugeau [B.], Barneche [J. A.], Shimabukuro [M. I.], Táboas [F. G.], Maroli [M.] & Almeida [M. J.] 2025:255, Figs. 1-4, 11 [Zoologischer Anzeiger v. 316; ref. 42115] Seasonal ponds, Parque Nacional Chaco, Rio Negro basin, Chaco Province, Argentina, approximately -26.82, -59.62, elevation 80 meters. Holotype: IBIGEO 496. Paratypes: CI-FML 8107 (14), IBIGEO 497 (15), MACN 13050 (2), MHNM 6879 (6). •Valid as Titanolebias calvinoi Alonso, Terán, Serra Alanís, Waldbillig, Montes, Bugeau, Barneche, Shimabukuro, Táboas, Maroli & Almeida 2025. Current status: Valid as Titanolebias calvinoi Alonso, Terán, Serra Alanís, Waldbillig, Montes, Bugeau, Barneche et al. 2025. Rivulidae: Cynolebiinae. Distribution: South America: Parque Nacional Chaco, Chaco Pro, Argentina. Habitat: freshwater.