Petitella Géry [J.] & Boutière [H.] 1964:474 Fem. Petitella georgiae Géry & Boutière 1964. Type by original designation (also monotypic). •Valid as Petitella Géry & Boutière 1964 -- (Géry 1977:547 [ref. 1597], see Malabarba 1998:232 [ref. 23844], Lima in Reis et al. 2003:153 [ref. 27061], Mirande 2009:7 [ref. 30267] in Characidae, Hemigrammus clade with question, Mirande 2010:500 [ref. 31006] in Characidae, Tetragonopterinae with question, Bittencourt et al. 2020:7 [ref. 37634], Melo et al. 2024:21 [ref. 41541] in Megalamphodinae). Current status: Valid as Petitella Géry & Boutière 1964. Acestrorhamphidae: Megalamphodinae.