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Hyphessobrycon compressus (MEEK, 1904)

Mayan Tetra

February 15th, 2014 — 1:46pm
Marco Endruweit

H. compressus is the type species of the genus Hyphessobrycon but is not well-known in the ornamental trade.

Hyphessobrycon was raised by Durbin in Eigenmann (1908) as a subgenus of Hemigrammus, differing from the latter by the absence of scales on the caudal-fin.

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Iguanodectes variatus GÉRY, 1993

January 2nd, 2014 — 6:47pm
Leandro Sousa

This species has been recorded from the Guaporé, Madeira, Branco, Trombetas, and Urubu river systems within the Amazon river basin, Brazil.

Type locality is ‘Igarapé Jatuarana, 5 kilometers above Samuel, Rio Guaporé, Rondonia, Brazil’.

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Iguanodectes spilurus (GÜNTHER, 1864)

Green Line Lizard Tetra

January 2nd, 2014 — 5:07pm
Neil Woodward

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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Iguanodectes adujai GÉRY, 1970

January 2nd, 2014 — 3:57pm
Neil Woodward

This species is known from the rio Negro within the Brazilan Amazon basin and upper Río Orinoco system in Venezuela.

Type locality is ‘Rio Adujá, Rio Itú, tributary of middle Rio Negro, Amazonia, Brazil’.

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Iguanodectes geisleri GÉRY, 1970

January 1st, 2014 — 9:43pm
Leandro Sousa

I. geisleri is typically exported for the aquarium trade alongside the similar-looking congener I. adujai (Géry, 1970) but can be identified by presence (vs. absence in I. adujai) of a black lateral stripe on the body beneath the red stripe, and possession of 20-25 (vs. 28-34) anal-fin rays.

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Hyphessobrycon eschwartzae ROMÁN-VALENCIA & ORTEGA, 2013

September 11th, 2013 — 4:57pm
Nathan Luján

H. eschwartzae is told apart from other laterally-striped Hyphessobrycon species from the Madre de Dios watershed by the following characters: 4 simple anal-fin rays (vs. 3 in other species listed); 13-15 dentary teeth (vs. 5-11); 6 teeth in the internal premaxillary ro…

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Hyphessobrycon brumado ZANATA & CAMELIER, 2010

September 5th, 2013 — 4:29pm
Eduardo Baena and Rafael Burger

This species superficially resembles the popular silver-tipped tetra, Hasemania nana, but can easily be told apart by presence (vs. absence) of an adipose-fin.

It can be told apart from other Hyphessobrycon sp…

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Hyphessobrycon borealis ZARSKE, LE BAIL & GÉRY, 2006

September 5th, 2013 — 4:01pm
Zarske et al.

H. borealis is a member of the putative ‘H. heterorhabdus-group’ of closely-related species within the genus as proposed by Géry (1977).

There are around 15 members characterised by a ‘longitudinal pattern’ consisting of a thin, usu…

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Hyphessobrycon auca ALMIRÓN, CASCIOTTA, BECHARA & RUÍZ DÍAZ, 2004

September 5th, 2013 — 2:33pm
A. E. Almirón et al.

The two ponds where H. auca was collected were located on a sand bar deposited by the nearby Paraná river during the Pleistocene.

At time of collection the substrates were composed of sand with submerged vegetation dominated by Egeria najas plus floating Eichhornia in marginal areas.

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Hyphessobrycon agulha FOWLER, 1913

September 5th, 2013 — 11:50am
H-J Chen

This species is relatively rare in the aquarium hobby but is occasionally traded as ‘red-tailed flag tetra’.

It lends its name to the H. aghula group of closely-related species within the genus as proposed by Géry (1977, see below) of which members share the following characters which set them apart from other characids: lower half of the body dark, especially above the anal-fin; usually possessing a laterally-elongate humeral spot, more-or-less united wit…

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