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Corydoras aurofrenatus EIGENMANN & KENNEDY, 1903

CW005

February 1st, 2013 — 10:51pm

C. aurofrenatus is currently understood to occur throughout much of the Río Paraguay-Paraná system in Paraguay, and has also been recorded in Argentina and Bolivia.

It was described from Paraguay with type locality given as ‘Aguada near Arroyo Trementina’. The latter is stated to be a tributary of the ‘Rio Aquido Canigi’.

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Corydoras amandajanea SANDS, 1995

December 11th, 2012 — 12:00pm

C. amandajanea is rare in the aquarium trade and appears to be variable in colour pattern to an extent, with some individuals posssessing relatively larger dark spots on the body, for example.

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.

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Corydoras albolineatus KNAACK, 2004

C056

December 11th, 2012 — 10:21am

In the upper Iténez it most commonly inhabits riparian zones with sandy substrates or edges of sand banks, although it’s also been collected in smaller streams and residual flood waters.

It typically forms large aggregations of up to several thousand individuals and at the confluence of the ríos Paraguá and Iténez occurs sympatrically with the congener C. paragua.

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Corydoras acutus COPE, 1872

Blacktop Cory

December 7th, 2012 — 4:23pm

This species can be confused with three similar-looking fishes of uncertain taxonomic status which have been assigned the C numbers C024, C077, and C109 in the aquarium hobby.

C024 and C109 are unlikely to be conspecific in that they occur in Pará state, Brazil, several thousand kilometers outside the range of C. acutus, in the rio Guamá (Tocantins drainage), and lower rio Xingu, respectively.

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Corydoras acrensis NIJSSEN, 1972

Acre Cory

December 6th, 2012 — 4:57pm

Type locality is ‘Furo do Lago São Francisco, 7°40’S, 72°39’W, tributary at left bank of Rio Juruá, Acre State, Brazil’, and C. acrensis appears to be endemic to the rio Juruá basin.

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.

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Corydoras virginiae BURGESS, 1993

Miguelito Cory

March 13th, 2012 — 1:23pm

This species is sometime referred to as ‘Virginia’s catfish’, Corydoras sp. ‘Sangama’ or ‘Zangama’, and prior to description was misidentified as both Corydoras bicolor and C. delphax.

Unfortunately additional 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.

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Corydoras simulatus WEITZMAN & NIJSSEN, 1970

March 13th, 2012 — 1:23pm

This species can be identified from similar-looking congeners by possession of a pair of small rictal barbels.

Its colour pattern can vary considerably depending on collection locality, with some forms having been misidentified as other species in the past. Those possessing a dark marking on the sides of the body are sometimes referred to as Corydoras sp. ‘olga’.

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Corydoras pastazensis WEITZMAN, 1963

Pastaza Cory

March 13th, 2012 — 1:23pm

The form from the Río Tigre, previously referred to as the subspecies C. p. orcesi (Weitzman & Nijssen, 1970) was raised to full species status as C. orcesi by Isbrücker (2001), but this decision does not appear to have been followed by all authorities some of which consider C. p. orcesi a synonym of C. pastazensis.

The two species are relatively easy to tell apart by colour pattern; in C. pastazensis the dark vertical…

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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 griseus HOLLY, 1940

March 13th, 2012 — 1:23pm

Native to Guyana, where it may be restricted to the Potaro River, a major tributary within the Essequibo watershed.

It was described from aquarium specimens which were said to have been collected in ‘very small water courses of the Amazon’, but the type locality was corrected to ‘Guyana-Essequibo, Potaro River, Kuribong trail’ by Nijssen and Isbrücker (1980).

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