Southern Thailand has five more named freshwater shrimp. In ZooKeys on September 15, 2026, Kongkit Macharoenboon and five co-authors described Caridina kuehnei, C. nangroma, C. srivijaya, C. takkola and C. tambralinga, after field surveys across the region’s rivers and streams.1
Caridina shrimp can look alike, and individuals of one species can vary a lot, so the team paired body measurements with DNA from two mitochondrial genes. The tree showed 18 lineages. With older records added, the region now has 21 known Caridina species, and almost half of them are endemic.1
The paper’s conservation section names habitat loss and overharvesting for the ornamental pet trade as threats to many Caridina species. In Thailand, the authors saw stream banks being lined with concrete and riprap, which removes the riverside plants several species live among. They single out landlocked species with tiny ranges, including the new C. kuehnei and C. srivijaya, as needing particular attention.1
Sources and notes 1 reference
- Macharoenboon et al. — A taxonomic review of the freshwater shrimp genus Caridina (Decapoda, Atyidae) from southern Thailand, with descriptions of five new species, ZooKeys 1292 (opens in a new tab)Published September 15, 2026
Background: September 15, 2026 (ZooKeys). Published November 1, 2026.
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