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Iguanodectes spilurus (GÜNTHER, 1864)

Green Line Lizard Tetra

January 2nd, 2014 — 5:07pm

Widely-distributed throughout the Amazon, Orinoco, Essequibo, and Tocantins river systems in Brazil, Peru, Bolivia, Ecuador, Colombia, Venezuela, and Guyana.

Type locality is ‘Rio Cupai [= Rio Cupari], Rio Tapajós basin, Amazon River drainage, Pará State, Brazil’.

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Acnodon normani GOSLINE, 1951

Sheep Pacu

December 10th, 2013 — 9:05am

Known only from the lower Amazon river basin, and possibly restricted to the Xingu and Tocantins watersheds.

Type locality is ‘ Rio Santa Teresa, a western tributary of upper Rio Tocantins, Goiaz State, Brazil’, referring to what is now known as Goiás state, central Brazil.

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Laetacara araguaiae OTTONI & COSTA, 2009

July 18th, 2013 — 3:59pm

This species was known as L. sp. ‘Buckelkopf’ in the aquarium hobby prior to publication of its official description.

It’s distinguished from all congeners by possessing 7-8 dorsal-fin rays (vs. 9–10 in L. dorsigera, L. fulvipinnis and L. thayeri, 8–9 in L. curviceps and L. flamannellus, and 9–11 in L. flavilabris).

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Boulengerella cuvieri (SPIX & AGASSIZ, 1829)

March 18th, 2013 — 12:29pm

It’s known by various vernacular names including ‘Pirá-pacu’, ‘Pira-pucu’ or ‘Diente de cao’ (central Amazon), ‘Bicuda’ or ‘Uena’ (rio Tocantins), ‘Bicuda’ (rio Tapajós), ‘Aguejeta’ or ‘Picua’ (Venezuela), and ‘Moruwi’ or ‘Pirapoko’ (Guyana).

The entire dorsal-fin base is located anteriorly to a vertical through the anal-fin origin and this character distinguishes it from all other ctenolucids except B. lucius and B. xyrekes.

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Hydrolycus tatauaia TOLEDO-PIZA, MENEZES & SANTOS, 1999

March 13th, 2013 — 4:36pm

Vernacular names in Brazil include ‘Cachorra’ or ‘Pirandirá’, although these are also applied to congeners.

It can be told apart from all congeners by the following combination of characters: head and body silvery with dark dorsal surface; an elongate dark blotch posterior to the opercle; dorsal, caudal and anal-fin rays reddish to orange proximally with some individual variation in intensity and tonality; adipose fin dark, with diffuse black pigmentation.

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Hydrolycus armatus (JARDINE, 1841)

Payara

March 13th, 2013 — 11:51am

H. armatus should probably not be considered a home aquarium subject at all given its eventual size and migratory natural behaviour.

Unfortunately, juveniles are seen for sale quite regularly, most often without adequate information regarding their long-term care, and it’s common to see them being maintained in medium-sized aquaria with no possibility of achieving their potential.

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Synaptolaemus latofasciatus (STEINDACHNER, 1910)

March 5th, 2013 — 9:52am

This species was described from a single specimen and included in the genus Leporinus until 2011 at which point the holotype was examined and recognised as corresponding to the fish described as Synaptolaemus cingulatus (Myers & Fernández-Yépez, 1950).

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Leporinus friderici BLOCH, 1794

Threespot Leporinus

March 4th, 2013 — 10:42am

This species was described from Suriname but no specific locality was given.

It’s currently accepted to occur throughout much of the Amazon river system in Brazil, Peru and Bolivia with additional records from coastal drainages of Guyana, Suriname and French Guiana plus the island of Trinidad (Trinidad and Tobago).

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Acestrorhynchus falcirostris (CUVIER, 1819)

March 13th, 2012 — 1:26pm

This species is a member of the putative A. nasutus group of closely-related species within the genus alongside A. nasutus, A. maculipinna and A. isalineae.

These are characterised by possession of two dark, longitudinal stripes, one running from the tip of the snout to the base and the other from the posterior edge of the lower maxilla to the underside of the caudal peduncle.

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Acestrorhynchus microlepis (JARDINE, 1841)

March 13th, 2012 — 1:26pm

An obligate piscivore capable of consuming quite large prey in relation to its body size although it tends to focus on smaller prey such as tetras and related species.

Newly-imported specimens may refuse to accept anything but live fishes although most can be weaned onto dead alternatives once they recognise them as edible, and some even learn to accept dried foods.

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