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Auchenipterichthys coracoideus (EIGENMANN & ALLEN, 1942)

Midnight Catfish

March 13th, 2012 — 1:22pm

This species is also known by the alternative vernacular name of ‘Zamora woodcat’, and is often misidentified as A. thoracatus. The latter is a valid species and very similar to A. coracoideus in that the coracoid bone is exposed ventrally and covered only by a thin layer of integument in both species. The two differ principally in the number of anal fin rays…

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Acestrorhynchus falcatus (BLOCH, 1794)

Red-tailed Freshwater Barracuda

March 13th, 2012 — 1:22pm

The vernacular name of this fish is derived from its appearance and behaviour, rather than a genetic association with the marine barracuda, and it’s also sometimes referred to as ‘pike characin’ or ‘spotted cachorro’ with local vernacular names including ‘Grand dent-chien’ (French Guiana), ‘ Cachorrinho’ or ‘Ueua’ (Brazil).

Although most species of Acestrorhynchus appear superficially similar to one another most exhibit distinguishable external chara…

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Colomesus asellus (MÜLLER & TROSCHEL, 1849)

Amazon Puffer

March 13th, 2012 — 1:22pm

This species is also referred to as ‘South American puffer’, ‘SAP’, ‘Amazonian puffer’, ‘Peruvian puffer’, or ‘Brazilian puffer’ in the ornamental trade.

Within the genus Colomesus, C. asellus can be immediately identified by possessing a unique transverse row of dermal flaps across the chin which is absent in its congeners C. psittacus and C. tocantinensis.

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Acanthicus adonis ISBRÜCKER & NIJSSEN, 1988

Polka Dot Lyre Tail Pleco

March 13th, 2012 — 1:22pm

Despite its patent unsuitability as an aquarium subject attractively-coloured juvenile specimens of this species are traded in quite large numbers, although the scarcity of privately-maintained adults would suggest that most fail to reach their potential. The striking, spotted patterning also disappears as this species matures, and since it also becomes increasingly bellligerent with age it can only be recommended to owners of the largest private aquaria or tropical ponds. There exists an albino…

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Aequidens tetramerus (HECKEL, 1840)

Saddle Cichlid

March 13th, 2012 — 1:21pm

This is the type species of the genus Aequidens and has the widest distribution of any member species. It exists in various colour forms depending on locality with variants from Ecuador and Peru being particularly sought after since they develop striking red (Ecuador) or orange (Peru) colouration on the lower part of the jaw, head and anterior portion of the belly whereas those from Brazil tend to have an overall grey/blue/green colouration, for example.

Despite its type status it's long…

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Brachyplatystoma filamentosum (LICHTENSTEIN, 1819)

Piraíba

March 13th, 2012 — 1:21pm

In the Amazon region it is only specimens larger than around 160 cm and werighing in excess of 50 kg that are referred to as ‘Piraíba’ with the name ‘filhote’ normally applied to smaller individuals. Other vernacular names include ‘Salton catfish’, ‘Kumakuma’; and ‘tiger antenna catfish’; with members of the genus often referred to collectively as ‘goliath catfishes’.

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Astyanax bimaculatus (LINNAEUS, 1758)

Two Spot Astyanax

March 13th, 2012 — 1:21pm

A. bimaculatus is not a popular aquarium fish but is available on occasion exception, most often as a contaminant among shipments of other species.

It’s identity is also in question to an extent with the name currently applied to what is considered to represent a species complex comprising at least four taxa.

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Hyphessobrycon stegemanni GÉRY, 1961

Savanna Tetra

March 13th, 2012 — 1:21pm

In the aquarium hobby the name Hyphessobrycon stegemanni has frequently been misapplied to a species that has been described as Hemigrammus ataktos Marinho, Dagosta, & Birindelli 2014. The reasons for this confusion are presumably that the two occur sympatrically in the rio Tocantins system and both possess a dark lateral stripe on the body.

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Hyphessobrycon heterorhabdus (ULREY, 1894)

Flag Tetra

March 13th, 2012 — 1:20pm

Its name appears to have been misapplied to similar-looking fishes occurring throughout much of the middle and lower Amazon in Brazil and Colombia, plus the rio Orinoco drainage in Colombia and Venezuela, and coastal systems of the Guianas. Some of these have been described as distinct species (e.g. Hyphessobrycon amapaensis Zarske & Géry 1998; H. eschwartzae García-Alzate, Román-Valencia & Ortega 2013; H. montagi Lima, Couthino & Woziacki 2014), whereas the identity of others remains un…

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Hyphessobrycon amandae GÉRY & UJ, 1987

Ember Tetra

March 13th, 2012 — 1:20pm

Type locality is ‘Rio das Mortes, some 100 km before its confluence with the Braço Maior of the Rio Araguaia (the western border of the Isla do Bananal). State of Mato Grosso.’

The das Mortes is a principal tributary of the Araguaia, itself the major affluent of the rio Tocantins within the lower Amazon basin in central and western Brazil, although the full range of H. amandae within the Araguaia system is unclear.

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