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Corydoras incolicana BURGESS, 1993

C001

March 13th, 2012 — 1:23pm

C. incolicana was the first recipient of a ‘C’ number (see below) in 1993 and was described the same year. Unfortunately its description was published in an aquarium hobbyist magazine, and we have been unable to obtain a copy to date meaning its diagnosis is unavailable. It is therefore difficult to identify accurately, not least because its type locality is in a relatively remote area, and there exist a number of superficially similar Corydoras species or populations in the aquarium trade.

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Corydoras guapore KNAACK, 1961

Guaporé Cory

March 13th, 2012 — 1:23pm

C. guapore is a sought after aquarium fish although it is not often traded. It exhibits slightly different behaviour to the majority of congeners in that it tends to form aggregations in midwater and spends a large proportion of its time away from the substrate. Its morphology exhibits corresponding adaptations towards a pelagic existence with a relatively large eye, a more terminal mouth position, more strongly-forked caudal-fin, and more symmetrical body shape than most other Corydoras species.

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Corydoras gomezi CASTRO, 1986

March 13th, 2012 — 1:23pm

This species’ range is unclear with collection records scarce, although it certainly occurs in the ‘Tres Fronteras’ region of the western Amazon river basin where the borders of Brazil, Colombia, and Peru meet.

Type locality is ‘Lakes of the Isla de Mocagua, Amazon River, near Leticia, Comisaría del Amazonas, 3°54’S, 70°14’W, Colombia’.

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Corydoras copei NIJSSEN & ISBRÜCKER, 1986

March 13th, 2012 — 1:23pm

This species is not well known and rarely traded for the aquarium hobby.

Unfortunately diagnostic characters cannot be provided since we’ve been unable to obtain the type description, and little has been written about this species since it was published. It looks very similar to several congeners, particularly C. acrensis and C. cruziensis.

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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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Satanoperca acuticeps (HECKEL, 1840)

Sharphead Eartheater

March 13th, 2012 — 1:22pm

This species is relatively rare in the ornamental trade, where it is sometimes confused with its similarly-patterned congeners S. daemon and S. lilith. These three species all possess 1-3 dark blotches on the side of the body and a relatively large ocellus on the upper caudal-fin base, characters that immediately separate them from the remainder of the genus which lack blotches on the body and have a relatively small ocellus on the upper caudal-fin base.

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Hyphessobrycon vilmae GÉRY, 1966

March 13th, 2012 — 1:21pm

Choice of décor is not especially critical although it tends to show better colouration when maintained in a well-furnished set-up with live plants and a dark substrate.

A natural-looking arrangement might consist of a soft, sandy substrate with wood roots and bran…

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Hyphessobrycon loretoensis LADIGES, 1938

Loreto Tetra

March 13th, 2012 — 1:21pm

The most recent diagnosis appears to be that of Géry (1977), in which it was separated from other members of the group by the following combination of characters: dorsal-fin insertion at or slightly anterior to mid-body; caudal-fin brick red to orange-red; body depth fits less than 3.6 times in SL; head length fits 3.5-4.0 times in SL; caudal peduncle length u…

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Hyphessobrycon megalopterus (EIGENMANN, 1915)

Black Phantom Tetra

March 13th, 2012 — 1:20pm

The majority of records pertain to the rio Guaporé (Río Iténez in Bolivia), the main affluent of the rio Mamoré, which drains the vast tropical wetland known as the Pantanal, and the upper rio Paraguai, which also has its headwaters in the Pantanal but flows in the opposite direction. The Guaporé and Paraguai are connected due to rising water levels during the annual wet season.

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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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