Coelurichthys Miranda-Ribeiro, 1908
Mimagoniates is a genus of characid fish from rivers and streams in southern and eastern Brazil, northeastern Argentina and Paraguay. Commonly known as croaking tetra or chirping tetra because they can produce sounds, some of these fish were formerly included in Glandulocauda. They have a supplementary breathing organ located above the gills which makes a faint chirping sound when these fish come to the surface to gulp air. It also plays a role in courtship as the male chases and hovers near the female while taking gulps of air and expelling it to make a rhythmic noise. Croaking behavior may have evolved from a behavior called "surface nipping", which occurs when the fish is searching for food. This gulping of air has no useful respiratory function.
There are currently 7 recognized species in this genus:
- Mimagoniates barberi Regan, 1907
- Mimagoniates inequalis (C. H. Eigenmann, 1911) (Croaking tetra)
- Mimagoniates lateralis (Nichols, 1913)
- Mimagoniates microlepis (Steindachner, 1877) (Blue tetra)
- Mimagoniates pulcher Menezes & S. H. Weitzman, 2009
- Mimagoniates rheocharis Menezes & S. H. Weitzman, 1990
- Mimagoniates sylvicola Menezes & S. H. Weitzman, 1990
- Froese, Rainer, and Daniel Pauly, eds. (2016). Species of Mimagoniates in FishBase. January 2016 version.
- Thomaz, A.T., Arcila, D., Ortí, G. & Malabarba, L.R. (2015): Molecular phylogeny of the subfamily Stevardiinae Gill, 1858 (Characiformes: Characidae): classification and the evolution of reproductive traits. BMC Evolutionary Biology, (2015) 15: 146.
- Axelrod, Herbert Richard (1996): Exotic Tropical Fishes. T.F.H. Publications. ISBN 0-87666-543-1
- Nelson, Keith (1964): The Evolution of a Pattern of Sound Production Associated with Courtship in the Characid Fish, Glandulocauda inequalis. Evolution 18(4): 526–540.doi:10.2307/2406207
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