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Brachyrhamdia thayeria Slobodian & Bockmann, 2013

Image contributors to this species:

Ian Fuller (3) Brian Perkins (1)

ScotCat Sources:

Etymology = Genus Etymology = Species

Other Sources:

Google Search  All Catfish Species Inventory


Relevant Information:

The common name of 'False Arched Cory' is due to its likeness (mimicking) to Corydoras arcuatus. The habit of shoaling with Corydoras species probably stems from the protection of this scaleless catfish from large predators due to the plated Corydoras where predators are wary of the locked pectoral and dorsal spines. There is the other scenario that states that the Brachyrhamdia are practising a Batesian form of shoaling whereas they take food that the Corydoras dig up from the substrate and also they steal the eggs of these species. Aquarium Care: House in aquaria (24ins/60cm or over) with alternate sand and gravel substrate. Provide planted area. Keep in a species tank or with Corydoras and larger Characins or Anabantoides in the top half as they can be predatory with small species such as Neon Tetras. Diet: Tablet and pellet foods. Frozen and live foods such as bloodworm. Insect larvae. Not a fussy eater. Remarks: This species is so new (2013) that it is not yet listed in Fishbase but is documented in Catalog of Fishes. The new species appears to have a mimetic association with the syntopic callichthyid Corydoras arcuatus. Herein, we argue in favour of the hypothesis that the interaction between species of Brachyrhamdia and Pimelodella or Corydoras is Müllerian mimicry. (Slobodian, V. and F. A. Bockmann 2013).

Common Name:

False Arched Cory






South America: Rio Japurá, a left margin tributary of the Rio Solimões, Amazonas basin, Brazil.


7.5cm. (3ins)


21-25°C (69-77°F)




Slobodian, V. and F. A. Bockmann 2013 (26 Sept.) A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus. Zootaxa 3717 (no. 1): 1-22.



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