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| Main Authors: | , , , , , , , , , , , , , |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Ecology and evolution
2026
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| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42016934/ |
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Table of Contents:
- Genomic Insights and Matrilineal Evolution Reveal Potential Dispersal Patterns of Species (Osteoglossomorpha: Notopteridae) in the Sundaland Biodiversity Hotspot. Palimirmo, Flandrianto Sih Putra, Angkasa Wibowo, Arif Aini, Sarifah Kim, Ah Ran Lee, Soo Rin Kang, Hye-Eun Choi, Jung Hwa Kurniawan, Kurniawan Prakoso, Vitas Atmadi Surbani, Indah Lestari Kim, Hyun-Woo Kang, Kyoungmi Kundu, Shantanu The family Notopteridae is distributed across Africa and Asia and plays an important role in ecological functioning, local economies, and conservation initiatives. However, mitogenomic data for notopterids from the Sundaland hotspot remain scarce, limiting comprehensive understanding of their genetic architecture and matrilineal evolutionary history. To address this knowledge gap, the present study reports the first complete mitochondrial genome of and re-sequences the mitogenome of , two sympatric species endemic to Sundaland. Both mitogenomes exhibit the canonical teleost mitochondrial organization, comprising 37 genes and an AT-rich control region, with (16,943 bp) representing the longest mitogenome reported within the genus to date. The codon usage analyses revealed a bias toward arginine, leucine, and serine, while nonsynonymous-to-synonymous substitution rate estimates indicated that most protein-coding genes are evolving under purifying selection. The phylogenetic analyses recovered well-supported African and Asian notopterid clades, with resolved as the sister lineage to . Nevertheless, mitogenomic- and COI-based phylogenetic frameworks inferred using Bayesian inference and maximum-likelihood approaches supported multiple hypotheses regarding the systematic positions of mainland and island species in Southeast Asia. The divergence time estimates were congruent with historical biogeographic reconstructions, suggesting that Miocene tectonic events played a major role in the diversification of from other Asian notopterids. Furthermore, paleodrainage reorganization during the Last Glacial Maximum appears to have been critical in shaping the contemporary population structure of across the insular landscapes of this region. Collectively, this study provides new insights into the matrilineal evolutionary history of African and Asian notopterids, with particular emphasis on Sundaic species. The findings underscore the need for expanded taxon sampling and additional molecular data to improve population monitoring, inform conservation genetics, and ensure the long-term persistence of these freshwater fishes within this biodiversity hotspot.