Zootaxa· 2026Q2
A new species of Laubuka (Cypriniformes: Danionidae) from the Irrawaddy River System, Myanmar
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- Q2SCImago
- 2026year
Short summary
A new fish species, Laubuka caeruleostriata, has been identified in the Irrawaddy River system of Myanmar, distinguished by unique blue and golden stripes and genetic divergence.
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Key points
- A new species, Laubuka caeruleostriata, is described from Myanmar's Irrawaddy River system.
- Key distinguishing features include two blue and golden longitudinal stripes and a visible swim bladder.
- Fin and scale measurements (dorsal-fin base length, pectoral fin length, predorsal scales) also differentiate it from congeners.
- Genetic analysis reveals it is an independent evolutionary lineage with 16-22% sequence divergence in mitochondrial genes (COI, Cytb).
AI-generated from the title and abstract; the full text is not read.
Abstract
A new species of the genus Laubuka Bleeker, 1859 is described from the Yangon and Pyapon rivers, distributaries of the Irrawaddy River system in Myanmar. Laubuka caeruleostriata sp. nov. can be distinguished from its congeners by the following combination of features: (1) two blue and golden longitudinal stripes extending from pectoral-fin base to caudal-fin base; (2) swim bladder visible through transparent area beneath blue longitudinal stripe; (3) dorsal-fin base length less than half anal-fin base length; (4) pectoral fin long, reaching beyond tip of pelvic fin; and (5) 21–22 predorsal scales. Phylogenetic analysis of mitochondrial genes using Maximum Likelihood (ML) and Bayesian Inference (BI) indicates that the new species represents an independent evolutionary lineage, with p-distances of 16–19% for COI and 19–22% for Cytb relative to its congeners.
The authors' abstract, as published at the source. Zootaxa, 2026 · DOI ↗
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Field: Aquatic Science
Aquatic ScienceAgricultural and Biological Sciences