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Gastrodermus nanus Nijssen & Isbrücker, 1967

Image contributors to this species:

Karsten Schönherr (1) Drake Shaw (2)

ScotCat Sources:

Other Sources:

Relevant Information:

Can sometimes be difficult to identify, has two white stripes along the body with a blackish stripe splitting them. All fins have a yellow tinge. One of the species in the so called "Elegans group" and it can be difficult at times to be able to identify to species. The problem stemmed from the first description which did not mention any characteristics. The first specimens captured were very small and the Holotype was only 23mm from the Surinam-Brokopondo, Surinam River system. There was also 6 paratypes which were smaller and are housed in the RMNH (4) and the ZMA (2). This Gastrodermus is not very common in the hobby. Lineage: Part of the so called "Elegans Group" which would place it in Lineage 5. A revision in the future could involve the resurrection of the genus name Gastrodermus (Cope, 1878), with the designated type species: C. elegans. As of the latest update Corydoras nanus has now been placed in Lineage 5 and has the new genus name of Gastrodermus (2024). Aquarium Care: This is akin to most of this genus, very peaceful, and would be best housed with small to medium sized tankmates such as Tetras, Rasboras and Danios or in a species tank for breeding purposes. Best to purchase 6 individuals or more as they will be happier in a group. Diet: Readily accepts a mixed and varied diet which includes granular foods, tablet food, frozen bloodworm and a good quality flake. Etymology: The specific name nanus: meaning "Dwarf", the smallest species of the genus (then known) in the Guianas. Remarks: The first thumbnail image depicted is a wild specimen which was captured by the image contributor in the Gran Rio a river in Suriname and is considered to be the true G. nanus. Still found on some online sources as Corydoras nanus.

Common Name:

None

Synonyms:

Corydoras nanus

Family:

Callichthyidae

Distribution:

South America: Suriname; Maroni River basin. French Guiana; Iracoubo River basin.

Size:

Male: 4.5cm (1¾ins) Female: 5.0cm (2ins)

Temp:

23-25°C (73-77°F)

p.H.

6.0-7.2.

Reference:

Alexandrou, Markos & Taylor, Martin. (2011). Evolution, ecology and taxonomy of the Corydoradinae revisited.
Angelica C Dias, Luiz F C Tencatt, Fabio F Roxo, Gabriel de Souza da Costa Silva, Sérgio A Santos, Marcelo R Britto, Martin I Taylor, Claudio Oliveira, Phylogenomic analyses in the complex Neotropical subfamily Corydoradinae (Siluriformes: Callichthyidae) with a new classification based on morphological and molecular data, Zoological Journal of the Linnean Society, 2024;, zlae053.
Fuller, Ian A.M. & Evers, Hans-Georg: Identifying Corydoradinae Catfish. 2005. 384 p.
Ian A. M. Fuller & Hans-Georg Evers (2011). Identifying Corydoradinae Catfish Supplement 1. Ian Fuller Enterprises.
Nijssen H. & Isbrücker I.J.H.: 1980, A review of the Genus Corydoras Lacepede, 1803. (Pisces, Siluriformes, Callichthyidae) 22p

Family: Callichthyidae Back to Ident-A-Cat Click on Thumbnails

Gastrodermus nanus

Gastrodermus nanus
Dorsal views

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