A new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the río Madre de Dios basin, Peru

Abstract

A new species of Corydoras is described from the río Madre de Dios basin, Peru. The new species can be distinguished from its congeners by presenting the following features: a longitudinal black stripe along midline of flank; mesethmoid short, with anterior portion poorly developed; serrations on posterior margin of pectoral spine directed towards the tip of the spine; dorsal fin with the region of the first branched ray, including membrane, with concentration of black pigmentation, the remaining areas with irregular black blotches; absence of a vertically elongated black blotch across the eyes; conspicuously rounded moderately-developed black spots on the snout; and ventral expansion of infraorbital 1 moderately developed.Uma espécie nova de Corydoras é descrita da bacia do rio Madre de Dios, Peru. A espécie nova pode ser distinguida de suas congêneres por apresentar as seguintes características: uma faixa preta longitudinal ao longo da linha mediana do flanco; mesetmóide curto, com porção anterior pouco desenvolvida; serrilhas na margem posterior do espinho peitoral voltadas em direção à ponta do espinho; região do primeiro raio ramificado da nadadeira dorsal, incluindo membranas, com concentração de pigmentação preta, as demais áreas com manchas pretas irregulares; ausência de uma mancha preta verticalmente alongada através dos olhos; manchas pretas moderadamente desenvolvidas, conspicuamente arredondadas, no focinho; e expansão ventral do infraorbital 1 moderadamente desenvolvida.

From the inside out: a new species of armoured catfish Corydoras with the description of poorly‐explored character sources (Teleostei, Siluriformes, Callichthyidae)

“…Corydoras benattii presents a general morphological pattern most similar to the species of lineage 9 sensu Alexandrou et al . (), with characteristics such as: the presence of a short mesethmoid; posterior margin of the pectoral‐fin spine with serrations generally directed towards the tip of the spine; infraorbital 1 generally with moderately developed ventral laminar expansion; infraorbital 2 generally not contacting compound pterotic, as cited by Tencatt & Britto () and Tencatt & Ohara (). Even though lineage 6 has a similar general morphological pattern as lineage 9, the assignment of C .…”

“…As mentioned by Tencatt & Evers (2016), the Corydoradinae are very popular in the aquarium hobby, being kept and reproduced for many decades by hobbyists around the world. Some species in the ornamental fish trade are recognized for the difficulty in determining their taxonomic status among those already described.…”

Redescription of Corydoras undulatus Regan, 1912 (Siluriformes: Callichthyidae), with comments on the identity of Corydoras latus Pearson, 1924

“…As explained by Tencatt & Evers [23], the color pattern of the Corydoradinae considerably change from their hatching till the adult stage. Corydoras undulatus is well known among fishkeeping hobbyists, and it was successfully bred under aquarium conditions by Hans-George Evers, who documented C .…”

Corydoras fulleri (Siluriformes: Callichthyidae), a new catfish species from the rio Madeira basin, Peru

“…Despite the wide geographic distribution of Corydoras in cis‐andean South America, its representatives predominantly occur in the Amazon basin, in which more than the half of the known species can be found (Tencatt & Ohara, 2016b). The rio Madeira basin, which flows into the rio Amazonas, is the world's richest drainage regarding the number of fish species (Jézéquel et al ., 2020; Torrente‐Vilara et al ., 2013), and currently harbours 44 species of Corydoras , representing one quarter of the total species of the genus (Ohara et al ., 2016; Tencatt & Evers, 2016; Tencatt & Ohara, 2016a, 2016b). As discussed in Tencatt and Evers (2016), the Corydoradinae are extremely popular in the aquarium hobby, which leads to the capture and discovery of many putative new species within the trade.…”

“…The rio Madeira basin, which flows into the rio Amazonas, is the world's richest drainage regarding the number of fish species (Jézéquel et al ., 2020; Torrente‐Vilara et al ., 2013), and currently harbours 44 species of Corydoras , representing one quarter of the total species of the genus (Ohara et al ., 2016; Tencatt & Evers, 2016; Tencatt & Ohara, 2016a, 2016b). As discussed in Tencatt and Evers (2016), the Corydoradinae are extremely popular in the aquarium hobby, which leads to the capture and discovery of many putative new species within the trade. Therefore, to prevent the creation of nomina nuda by using trade names, the C‐number code‐system was created, which was posteriorly replaced by CW‐number coding (Evers, 1993; and see Corydoras World website).…”