Microgenys, Eigenmann, 1913

Toledo-Piza, Mônica, Baena, Eduardo G., Dagosta, Fernando C. P., Menezes, Naércio A., Ândrade, Marcelo, Benini, Ricardo C., Bertaco, Vinicius A., Birindelli, José Luís O., Boden, Gert, Buckup, Paulo A., Camelier, Priscila, Carvalho, Fernando R., Castro, Ricardo M. C., Chuctaya, Junior, Decru, Eva, Derijst, Eddy, Dillman, Casey B., Ferreira, Katiane M., Merxem, Dimitri G., Giovannetti, Victor, Hirschmann, Alice, Jégu, Michel, Jerep, Fernando C., Langeani, Francisco, Lima, Flávio C. T., Lucena, Carlos A. S., Lucena, Zilda Margarete S., Malabarba, Luiz R., Malabarba, Maria Cláudia S. L., Marinho, Manoela M. F., Mathubara, Kleber, Mattox, George M. T., Melo, Bruno F., Moelants, Tuur, Moreira, Cristiano R., Musschoot, Tobias, Netto-Ferreira, André L., Ota, Rafaela P., T. Oyakawa, Osvaldo, Pavanelli, Carla S., Reis, Roberto E., Santos, Osmar, Serra, Jane Piton, Silva, Gabriel S. C., Silva-Oliveira, Cárlison, Souza-Lima, Rosana, Vari, Richard P. & Zanata, Angela M., 2024, Checklist of the species of the Order Characiformes (Teleostei: Ostariophysi), Neotropical Ichthyology (e 230086) 22 (1), pp. 1-548 : 218

MICROGENYS Eigenmann, 1913

AL Netto-Ferreira

Microgenys Eigenmann, 1913:22 . Type species: Microgenys minutus Eigenmann, 1913 . Type by original designation. Gender: Feminine.

Microgenys lativirgata Pearson, 1927

Microgenys lativirgatus Pearson , in Eigenmann , 1927:355. Type locality: Rio Pusoc, above Balsas, Peru. [Río Pusoc is likely a mispelling form of Río Púsac, a right bank tributary of Río Marañon near 06°58’10”S, 78°00’01”W]. Syntypes: CAS 47171 (4).

Distribution: 312 (Eigenmann, 1927).

Microgenys minuta Eigenmann, 1913

Microgenys minutus Eigenmann, 1913:22 . Type locality: Rio Viera at Piedra Moler. [Piedra de Moler (4°42’40”N, 75°51’26”W) in Valle del Cauca, Colombia, near the border with the Risaralda department, is cut by the Río La Vieja (possibly the correct form of the Río Viera of Eigenmann)]. Holotype: FMNH 56215 .

Distribution: 302 (Eigenmann, 1913).

Microgenys weyrauchi Fowler, 1945

Microgenys weyrauchi Fowler, 1945b:3 , fig. 4. Type locality: Ninabamba near Ayacucho, at 1900 meters elevation, Rio Ucayali basin, Peru. [Ninabamba (13°25’42”S, 73°50’17”W) is a small village at the left bank of the Río Pampas, draining into the Río Apurímac]. Holotype: ANSP 71627 .

Distribution: 312 (Fowler, 1945b).

Remarks: Although considered a possible synonym of Bryconacidnus ellisae by Géry (1977) and Lima et al. (2003), specimens lack the “peppered” colour pattern mentioned by Géry for B. ellisae. On the other hand, the species shares several similarities with species of Bryconacidnus , but only a concatenated revisionary study of both genera will allow a proper evaluation of the validity of M. weyrauchi .