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Apistogramma sp. 'breitbinden'

A164, A165, A167

March 13th, 2012 — 1:26pm

The German term 'breitbinden' translates literally as "broad-banded" and refers to the uniformly broad suborbital stripe seen in males of this 'species' which remains undescribed despite being known in the aquarium hobby for several decades. It's often imported as bycatch among shipments of wild-collected A. iniridae.

Some of the populations have also been assigned th…

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Biotoecus opercularis (STEINDACHNER, 1875)

March 13th, 2012 — 1:26pm

At time of writing there exists no scientific evidence that the different populations of this species seen in the aquarium trade (see 'Distribution') represent anything other than a single, widely-distributed species although some exibit minor morphological differences including relative body depth, longer fin rays in the unpaired fins and yellow or orange colouration in the paired fins. There is apparently a form from the upper rio Negro which may turn out to be distinct but it's…

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Biotodoma wavrini (GOSSE, 1963)

Orinoco Eartheater

March 13th, 2012 — 1:26pm

Populations known in the aquarium trade include ‘Cuao’, ‘Orinoco’, ‘San Antonio’, and ‘Sipapo Ventuari’.

B. wavrini and its congener B. cupido can be separated by body shape and position of the dark blotch on the posterior portion of the flank. In B. cupido the body is relatively compact and the blotch located above the upper lateral line, whereas in B. wavrini the body is noticeably elongate and the blotch on or below the upper lateral line.

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Andinoacara sp. 'Orinoco'

March 13th, 2012 — 1:26pm

This apparently undescribed species was traded as 'Aequidens' sp. 'Orinoco' but following Musilová et al. (2009) appears to be a member of the genus Andinoacara.

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Geophagus parnaibae STAECK & SCHINDLER, 2006

March 13th, 2012 — 1:25pm

Although only described in 2006 this species has been known in the hobby since at least 1988 when it was imported to Germany and traded as G. sp. 'Parnaíba'. An undescribed species from the rio Pindaré in Maranhão state usually sold as G. sp. 'Pindaré' is sometimes labelled G. sp. 'Pindaré' (Parnaíba) which has resulted in some confusion but the two do not occur sympatrically and are totally distinct from one another.

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Geophagus brachybranchus KULLANDER & NIJSSEN, 1989

March 13th, 2012 — 1:25pm

This species is generally rare in the aquarium hobby though oddly appears to be one of the commoner species in Australia where it’s often referred to by the vernacular name ‘black-throated eartheater’. It’s a member of the nominal G. surinamensis ‘group’ of closely-related species within the genus and can be identified by a combination of characters including: presence of dark preopercular markings; no vertical bars on the flanks even when stressed/preserved; base of filaments on the first gill arch mostly covered by a flap of skin; exposed part of bra…

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'Geophagus' brasiliensis (QUOY & GAIMARD, 1824)

Pearl Cichlid

March 13th, 2012 — 1:25pm

This species is also known as the 'pearlscale' or 'mother-of-pearl' cichlid in deference to the iridescent body scaling. It's also worth noting that fishes sold as Gymnogeophagus australis in Europe are ‘G.brasiliens is more often than not.

Wild specimens exhibits significant dissimilarities in body colour and patterning depending on locality with basic colouration being dominated by varying shades of blue, green or yellow, for example. Some populations al…

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Geophagus taeniopareius KULLANDER & ROYERO, 1992

March 13th, 2012 — 1:25pm

This species is relatively rare in the hobby but sometimes available from specialist retailers or private breeders. Though described in 1992 it was first collected much earlier and has been in the hobby since the late 1970s, being known as ‘Wangenstrich-Erdfresser’ (cheek-stripe eartheater) in Germany.

It’s one of just five Geophagus species not to be included in the nominal G. surinamensis ‘group’ of closely-related species within the genus along with G. argyrostictus, G. gottwaldi, G. grammepareius and G. harreri.

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Geophagus argyrostictus KULLANDER, 1991

March 13th, 2012 — 1:25pm

This species is relatively rare in the hobby but sometimes available from specialist retailers or private breeders. Though described in 1991 it was first collected much earlier and misidentified by Gosse (1976) as G. surinamensis.

It’s one of just five Geophagus species not to be included in the nominal G. surinamensis ‘group’ of closely-related species within the genus along with G. gottwaldi, G. grammepareius, G. harreri an…

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Geophagus camopiensis PELLEGRIN, 1903

Oiapoque Eartheater

March 13th, 2012 — 1:25pm

In a study conducted on the Arataye River, the main tributary of the Approuage, this species was mostly collected from stretches of rapids with rocky substrate which were reduced to a series of pools during the dry season. Other fishes observed at the same site were Auchenipterus nuchalis, Hypostomus gymnorhynchus and Moenkhausia cf. intermedia while at other localities in the river Bryconops affinis, Myleus ternetzi, M. rhomboidalis, Moenkhausia aff. barbouri, Curimata sp. and Serrasalmus sp. were collected.

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