Mimagoniates

Mimagoniates is a genus of characid fish from rivers and streams in southeastern, southern and central-western Brazil, northeastern Argentina, and Paraguay.[1][2] The individual species generally have relatively small ranges and two, M. lateralis and M. sylvicola, are considered threatened by Brazil's Ministry of the Environment.[3]

Mimagoniates
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Actinopterygii
Order:
Characiformes
Family:
Characidae
Subfamily:
Stevardiinae
Genus:
Mimagoniates

Regan, 1907
Synonyms

Coelurichthys Miranda-Ribeiro, 1908

Commonly known as croaking tetra or chirping tetra because they can produce sounds,[4] some of these fish were historically included in Glandulocauda and together with Lophiobrycon they form the tribe Glandulocaudini.[2] Mimagoniates 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.[4] 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.[5] They are small fish, up to 3–6.1 cm (1.2–2.4 in) in standard length depending on the exact species.[1]

Species

There are currently 7 recognized species in this genus:[1][2]

References
  1. Froese, Rainer and Pauly, Daniel, eds. (2016). Species of Mimagoniates in FishBase. January 2016 version.
  2. 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.
  3. ICMBio (Ministry of the Environment, Brazil): Portaria MMA nº 445, de 17 de dezembro de 2014. Lista de Especies Ameaçadas - Saiba Mais. Retrieved 1 December 2018.
  4. Axelrod, Herbert Richard (1996): Exotic Tropical Fishes. T.F.H. Publications. ISBN 0-87666-543-1
  5. 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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