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vol.12 issue1A new species of the Hypostomus cochliodongroup (Siluriformes: Loricariidae) from the rio Aripuanã basin in BrazilRedescription of Panaqolus purusiensis(LaMonte, 1935) (Siluriformes: Loricariidae) with identification key to the species of the genus author indexsubject indexarticles search
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Neotropical Ichthyology

Print version ISSN 1679-6225On-line version ISSN 1982-0224


ROSA, Alaina Cristine  and  LANGEANI, Fernanda de Oliveira Martins and Francisco. Miniaturization in Otothyris Myers, 1927 (Loricariidae: Hypoptopomatinae). Neotrop. ichthyol. [online]. 2014, vol.12, n.1, pp.53-60. ISSN 1679-6225.

Many species of freshwater fishes are considered miniatures, nevertheless, their identification as miniatures is frequently based only on an arbitrary criterion of small body size. Although some species of Otothyris had been suggested to be miniature, informations about the process and consequences of miniaturization in the genus are lacking. Here, we detail developmental events of loss, fusion, and modifications in several bones, the laterosensory system, and even the brain, that in sum demonstrate miniaturization in all species of the genus. Our results may be useful in the recognition of other miniature species of loricariids.

Keywords : Freshwater; Heterochrony; Miniature; Neotropical region; Ontogeny.

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