concept

teleost fish

Also known as: Teleost fishes, teleosts, teleost fish

Facts (12)

Sources

Comparable Ages for the Independent Origins of Electrogenesis in ... journals.plos.org PLOS ONE 11 facts

perspectiveThe authors refer to gymnotiforms and mormyroids as a textbook example of convergent evolution to highlight their independent origins from phylogenetically unrelated and phenotypically dissimilar teleost ancestors.

claimThe mitochondrial DNA sequence content and order in the 70 teleost species analyzed are typical of those found in most other teleosts.

claimGene duplication is considered an important source of raw material for the origin of novel traits, including electrogenesis in teleosts.

referenceHoegg S, Brinkmann H, Taylor JS, and Meyer A (2004) published 'Phylogenetic timing of the fish-specific genome duplication correlates with the diversification of teleost fish' in 'J Mol Evol' 59: 190–203.

referenceWiley EO and Johnson GD (2010) published 'A teleost classification based on monophyletic groups' in 'Origin and Phylogenetic Interrelationships of Teleosts', edited by Nelson JS, Schultze HP, and Wilson MVH, München: Verlag Dr. Friedrich Pfeil, pp. 123–182.

claimThe nodes defining the Notopteroidei and Characiphysae clades define minimum age estimates for the independent origins of electroreception among teleosts, specifically in the form of derived ampullary electroreceptors.

claimWhole genome duplication (WGD) occurring just prior to the radiation of teleosts contributed to the origin of novel electrogenic systems in mormyroids and gymnotiforms.

claimThe most recent common ancestor of the Mormyroidea and Gymnotiformes was a non-electrogenic basal teleost that lived more than 85 million years before the origin of these electric fish lineages.

procedureThe study estimated the relative ages of stem- and crown-group gymnotiforms and mormyroids by including their putative sister groups, the Siluriformes and the Notopteridae, as well as a large sampling of basal teleost fishes.

measurementTeleost fishes comprise the largest group of vertebrates, containing more than 31,000 species.

claimWithin teleost fishes, electroreception is restricted to two distantly related groups: the Siluriphysi (Gymnotiformes plus Siluriformes) and the Notopteroidei (Mormyroidea plus Notopteridae).

Electroreception, electrogenesis and electric signal evolution - ADS ui.adsabs.harvard.edu ADS 1 fact

measurementSome groups of elasmobranchs and teleosts generate weak electric-organ discharges (EODs) of less than 10 volts or strong EODs of greater than 50 volts to facilitate communication or predation, though these groups do not perform electrolocation.