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Colomesus tocantinensis AMARAL, BRITO, SILVA & CARVALHO, 2013

August 13th, 2015 — 8:18pm

It is distinguished from congeners by the following combination of characters: anal-fin with 6-7 basal pterygiophores and 9 rays (vs. 10-11 rays in C. asellus and C. psittacus; dorsal-fin with 10 bas…

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Retroculus acherontos LANDIN, MAREIRA & FIGUEIREDO, 2015

July 23rd, 2015 — 4:46pm

Known only from affluents within the upper rio Tocantins basin draining into the enormous Serra da Mesa hydroelectric reservoir in Goiás state, Brazil. It has been collected from the rios Maranhão, das Almas, Traíras, and Palmerinha/Palmeira(?).

Type locality is ‘Brazil, Goiás, Rio Tocantins basin, Rio das Almas, tributary of left margin of Rio Maranhão, 14˚37′51.2″S, 49˚1′56.6″W’.

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Retroculus lapidifer (CASTELNAU, 1855)

July 21st, 2015 — 8:14pm

Retroculus spp. are unsuitable for the standard community aquarium, and should be maintained in a set-up designed to resemble a flowing river. The substrate should be composed of soft sand mixed with small pebbles if the aim is to breed the fish (see ‘Reproduction’). Rocks, boulders, roots, branches, and aquatic plants can also be added, although the la…

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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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Peckoltia sp.


June 23rd, 2013 — 6:11pm

Wild specimens are probably omnivorous foragers but with a preference for aquatic invertebrates and suchlike.

In the aquarium it does best when offered a varied diet comprising sinking dried foods, frozen Daphnia, mosquito larvae, chironomid larvae (bloodworm), and prawn/shrimp, for, example, plus some fresh fruit, parboiled potato, etc.

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Peckoltia oligospila (GÜNTHER, 1864)

L006, Brown Dot Peckoltia

June 23rd, 2013 — 3:08pm

This species can be distinguished from all congeners except P. bachi and some specimens of P. furcata by possessing only faint spots and saddles on the body.

It can be told apart from P. bachi by possession of narrow (vs. wide) pelvic-fin spines, having the eyes positioned high (vs. low) on the head, and distinctly round (vs. appearing more as a mottling) spots on the body.

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Corydoras splendens (CASTELNAU, 1855)

Emerald 'Brochis'

June 18th, 2013 — 10:57pm

This species was formerly included in the genus Brochis alongside C. britskii and C. multiradiatus, and is sometimes referred to as ‘common brochis’. Juveniles have a mottled colour pattern and are sometimes traded as ‘hi-fin cory’ due to their enlarged dorsal-fin.

C. splendens can be told apart from other ex-Brochis species by possession of 10-12 dorsal-fin rays…

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Boulengerella maculata (VALENCIENNES, 1850)

March 19th, 2013 — 9:03am

Both species also possesses a broader dark midlateral stripe on the body which tends to be more well-defined in B. lateristriga than in B. maculata.

Colour pattern in B. maculata varies considerably with some specimens noticeably paler than others, for example, and the the broad midlateral stripe usually less intense in such individuals.

This does not app…

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