Bryconacidnus, Myers, 1929

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 : 115-116

BRYCONACIDNUS Myers, 1929

AL Netto-Ferreira

Bryconacidnus Myers , in Eigenmann, Myers, 1929:545. Type species: Hyphessobrycon ellisi Pearson, 1924 . Type by original designation. Gender: Masculine.

Bryconacidnus ellisae (Pearson, 1924)

Hyphessobrycon ellisi Pearson, 1924:39 , Pl. 10 (fig. 2). Type locality: Espia. [Espía, is described in Pearson (1924) as a locality near the confluence of the La Paz and Miguilla rivers in La Paz State, Bolivia, forming the Río Bopi, itself a major former of the Río Beni , along with Río Cochabamba]. Syntypes: (55): CAS 47167 (37), SU 24660 (3), UMMZ 66505 (14), USNM 117544 (1), plus additional material.

Distribution: 312, 337 (Lima et al., 2003).

Remarks: Pearson (1924) dedicated the name to Mrs. Marion Durbin Ellis and therefore the name should be emended into ellisae Bragança et al. (2016). Although samples from other localities in Peru and Ecuador are assigned to this species, a thorough revision of the genus is necessary.

Bryconacidnus hemigrammus (Pearson, 1924)

Bryconamericus hemigrammus Pearson, 1924:44 . Type locality: Popoi River, Upper Beni . [Although Pearson (1924) described several of the main localities sampled in Bolivia, none is presented as “Río Popoi”. Downstream the confluence of the rivers Bopi with Río Cochabamba, forming the Río Beni , there is a small village named Popoy (approx. 15°38’24”S, 67°09’56”W), near which Pearson may have sampled during the Mulford Expedition]. Syntypes: CAS 39616 (7), UMMZ 66499 (4).

Distribution: 312 (Lima et al., 2003).

Remarks: Although samples from other localities in Peru and Ecuador are assigned to this species, a thorough revision of the genus is necessary.

Bryconacidnus hypopterus (Fowler, 1943)

Bryconamericus hypopterus Fowler, 1943d:241 , fig. 20. Type locality: Florencia , Rio Orteguasa, Colombia . Holotype: ANSP 70505 .

Distribution: 313 (Fowler, 1943d).

Remarks: Generic assignment based on Thomaz et al. (2015) based on poor taxon sampling of the clade including Knodus and other small genera of Stevardiinae ; see criticism in Menezes, Netto-Ferreira (2019).

Bryconacidnus paipayensis (Pearson, 1929)

Hemigrammus paipayensis Pearson , in Eigenmann, Myers, 1929:533. Type locality: Paipay, Rio Crisnejas . [In the original description, specimens from Río Pusoc (a mispelling form of Río Púsac, right bank tributary of Río Marañon near 06°58’10”S, 78°00’01”W), and from Paipay, Rio Crisnejas (misspelling of Pay Pay – 07°20’33”S, 77°56’4”W) are listed, but only those from the latter locality constitute the type series of the species]. Syntypes: CAS 44467 (now 1). Additional original material: CAS 44468 (now 216), ZMA 114207 (1). [Originally listed as “Many” in IU 17643: currently a single specimen is catalogued under CAS 44467 (ex-IU 17643) and remaining syntypes were removed to CAS 44468 (216), and ZMA 114207 (1)].

Distribution: 316, 317 (Lima et al., 2003).

Remarks: Although samples from other localities in Peru and Ecuador are assigned to this species, a thorough revision of the genus is necessary.

Bryconacidnus pectinatus ( Vari, Siebert, 1990)

Bryconamericus pectinatus Vari, Siebert, 1990:517 , figs. 1–5. Type locality: Peru, Departamento Madre de Dios, Provincia Manú, Parque Nacional de Manú , second large quebrada along Trail 1 leading to the east from Pakitza, tributary of Río Manú (approx. 11°50’S, 71°21’W). Holotype: MUSM 2057.

Distribution: 318 ( Vari, Siebert, 1990 ).

Remarks: Generic assignment based on Thomaz et al. (2015), however based on poor taxon sampling of the clade including Knodus and other small genera of Stevardiinae ; see criticism in Menezes, Netto-Ferreira (2019), after Weitzman et al. (2005:350) tentatively transferred this species to Knodus .