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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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Acanthodoras spinosissimus (EIGENMANN & EIGENMANN, 1888)

Chocolate Talking Catfish

March 13th, 2012 — 1:26pm

This species, which may also be referred to by the alternative vernacular names 'spiny catfish', 'painted talking catfish' or 'chocolate raphael', isn't particularly common in the trade and most often exported only as bycatch among shipments of Platydoras armatulus. It appears very similar to A. cataphractus with the most useful external distinguishing character being the presence of pale blotches on the dorsal surface, between the dorsal and caudal fins, in….

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Copella arnoldi (REGAN, 1912)

Splash Tetra

March 13th, 2012 — 1:23pm

This species is also known as the ‘spraying’, ‘splashing’ or ‘jumping’ tetra and these names are also sometimes applied to its congeners although none of them exhibit a comparable spawning strategy, simply depositing their eggs among vegetation at or around the water surface.

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Carnegiella strigata (GÜNTHER, 1864)

Marbled Hatchetfish

March 13th, 2012 — 1:23pm

C. strigata is an enduringly popular species in the aquarium hobby but is not bred on a commercial basis with all fish offered for sale collected in the wild.

It can be told apart from other members of the genus by its larger adult size and dark, marbled colour pattern appearing as a series of dark and light stripes running diagonally across the body below the lateral line.

This colour pattern is variable and popul…

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Rhaphiodon vulpinus SPIX & AGASSIZ, 1829

Biara

March 13th, 2012 — 1:23pm

R. vulpinus is the most widely-distributed member of the family Cynodontidae.

Type locality is given simply as ‘Brazilian rivers’, but this species is currently understood to be distributed in the Amazon basin from the Río Ucayali system in Peru, eastward as far as the rio Xingu in Brazil, plus the rio Tocantins and Rio Capim basins.

It’s also known from the Río Orinoco ba…

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Crenuchus spilurus GÜNTHER, 1863

Sailfin Characin

March 13th, 2012 — 1:23pm

This species is currently the only described member of its genus although colour pattern and morphology vary considerably across its range.

You may see reference to this species being the only fish species to possess infra-red vision, but other species also possess this ability and we suspect that infra-red plays an important role in the reproductive cycle of many fishes.

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Biotodoma cupido (HECKEL, 1840)

Cupid Cichlid

March 13th, 2012 — 1:23pm

Recorded throughout much of the Amazon basin, with its range extending eastwards from the Ucayali system in Peru as far as the Tocantins drainage which flows into the Atlantic alongside the Amazon at its delta. The southern extremity of its range appears to be the Río Mamoré in Bolivia, a tributary of the rio Guaporé, and the northern limit the Essequibo basin, Guyana.

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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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Corydoras bondi GOSLINE, 1940

Blackstripe Cory, C031

March 13th, 2012 — 1:22pm

Type locality is ‘Río Yuruari, 3 kilometers east of El Callao, 7°18’N, 61°50’W, Bolivar, Venezuela’, and this species is also known from the Rupununi River drianage in Guyana and the Courantyne/Corantijn system in Suriname.

The Yuruari, an affluent of the Río Cuyuni, an…

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