Moenkhausia cf. sanctaefilomenae ( Steindachner, 1907)

Reia, Lais, S. da Costa e Silva, Gabriel, Garcia-Ayala, James R., P. F. Vicensotto, Ana Maria & Benine, Ricardo C., 2020, Ichthyofauna of the ribeirão Sucuri, a tributary of the rio Tietê, upper rio Paraná basin, southeastern Brazil, Check List 16 (3), pp. 711-728: 718

publication ID 10.15560/16.3.711

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Moenkhausia cf. sanctaefilomenae ( Steindachner, 1907)


Moenkhausia cf. sanctaefilomenae ( Steindachner, 1907)  

Figure 3D

Original description. Tetragonopterus   sanctaefilome- nae Steindachner 1907: 82.

Material examined. BRAZIL • 1, 40.6 mm SL; São Paulo state, Pongaí, Córrego Água Grande ; 21°41′31″S, 049° 20′31″W; 12 May 2018; leg. Silva G.S.C. and Reia L. ( LBP 26510 View Materials ) GoogleMaps   .

Identification. Body deep; mouth terminal; premaxil- lary teeth in two rows, inner row with five pentacuspi- date teeth, outer row with three tricuspidate teeth; two tricuspidate teeth on maxilla; dentary with five anteri- ormost teeth larger, tri- to pentacuspidate. Lateral line complete with 25 perforated scales; four horizontal scale rows above lateral line; four horizontal scale rows be- low lateral line. Overall body coloration silver; dark chromatophores concentrated on distal margin of scales resulting in conspicuous reticulated pattern; conspicu- ous vertical dark humeral blotch; caudal peduncle with conspicuous dark spot extending to base of caudal-fin, preceded by a lighter area; dorsal portion of eyes red; yellowish fins.

Remarks. Specimens collected in the ribeirão Sucuri have a complete lateral line, as in M. australis Eigenmann, 1908   , but they differ in the number of transver- sal scale rows above and below lateral line (4 vs 5). Reia et al. (2019) identified the specimens of the socalled Moenkhausia oligolepis   group from the upper Paraná basin (except from Mato Grosso do Sul state) as Moenkhausia cf. sanctaefilomenae   by presenting a variable number of transversal scale series and an interrupted lateral line. This criterion is adopted herein. The M. oligolepsis   group is being taxonomically revised by the first author.