What does this research mean for the field?

The cichlid genus Mesonauta is monophyletic and consists of six distinct monophyletic groups with specific geographic and sister-group relationships across South American river basins. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Resolve the evolutionary relationships and verify the monophyly of the Neotropical cichlid genus Mesonauta using molecular data.

August 29, 2026Organisms Diversity & EvolutionOpen Access

Molecular phylogeny of Mesonauta Günther, 1862 (Cichliformes: Cichlidae)

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Authors

RORianne Caroline de OliveiraUniversidade Estadual de Maringá RBRicardo BritzkeNational University of San Marcos COCláudio OliveiraFederal University of São João del-Rei

Discussion

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Overview

Phylogenetic analysis reveals genus monophyly and two major lineages in Mesonauta cichlids, highlighting complex evolutionary relationships and unresolved species boundaries.

Key Points

Resolve the evolutionary relationships and verify the monophyly of the Neotropical cichlid genus Mesonauta using molecular data.
Sequenced and analyzed two mitochondrial genes, COX1 and 16S, across Mesonauta taxa.
Reconstructed phylogenetic relationships using Maximum Likelihood and Bayesian Inference methods.
Maximum Likelihood and Bayesian Inference analyses both corroborate the monophyly of Mesonauta, recovering two primary sister clades containing six monophyletic groups.
Bayesian Inference revealed topological discordance with Maximum Likelihood, mirroring prior species delimitation questions regarding Mesonauta insignis/egregius and Mesonauta mirificus/guyanae.

Cite This Study

Oliveira et al. (2026) studied this question.

synapsesocial.com/papers/6a9299ac8e5d7d1fc0c11bb2 https://doi.org/10.1007/s13127-026-00708-2

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August 29, 2026Organisms Diversity & EvolutionOpen Access

Molecular phylogeny of Mesonauta Günther, 1862 (Cichliformes: Cichlidae)

View Full Paper

Ask AI

Bookmark

Authors

RORianne Caroline de OliveiraUniversidade Estadual de Maringá RBRicardo BritzkeNational University of San Marcos COCláudio OliveiraFederal University of São João del-Rei

Discussion

Member takes

Overview

Phylogenetic analysis reveals genus monophyly and two major lineages in Mesonauta cichlids, highlighting complex evolutionary relationships and unresolved species boundaries.

Key Points

Resolve the evolutionary relationships and verify the monophyly of the Neotropical cichlid genus Mesonauta using molecular data.
Sequenced and analyzed two mitochondrial genes, COX1 and 16S, across Mesonauta taxa.
Reconstructed phylogenetic relationships using Maximum Likelihood and Bayesian Inference methods.
Maximum Likelihood and Bayesian Inference analyses both corroborate the monophyly of Mesonauta, recovering two primary sister clades containing six monophyletic groups.
Bayesian Inference revealed topological discordance with Maximum Likelihood, mirroring prior species delimitation questions regarding Mesonauta insignis/egregius and Mesonauta mirificus/guyanae.

Cite This Study

Oliveira et al. (2026) studied this question.

synapsesocial.com/papers/6a9299ac8e5d7d1fc0c11bb2 https://doi.org/10.1007/s13127-026-00708-2

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