New Freshwater Fish Genus Koima Discovered in Western Ghats
Why focus: GS3 Biodiversity. Western Ghats endemic species discoveries frequently appear as 'Koima is recently in news, what is it?' MCQs.
In News
What Happened
Why It Matters
Background
History & Context
What Changed
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BEFORE: Two distinct fish were scientifically recognized as Mesonoemacheilus remadevii (Shaji 2002) and Nemacheilus monilis (Hora 1921). NOW: They have been formally reclassified and renamed as Koima remadevii and Koima monilis under the newly coined genus.
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BEFORE: The taxonomic placement of these fishes relied on outdated morphological assumptions linking them to widespread Southeast Asian lineages. NOW: Advanced multi-gene phylogenetic analysis isolates them in a distinct peninsular Indian monophyletic group, sister to the endemic Schistura denisoni.
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BEFORE: Accurate identification was difficult due to the fishes' small size, complex color variations, and morphological plasticity. NOW: The Koima genus provides clear diagnostic criteria, specifically a yellowish-brown ground color, a single row of lateral black spots, hyaline (transparent) fins, and the absence of a uniform dorsal banding pattern.
Prelims Angle
NCERT Connection
Practice Questions
Q1
With Reference ToWith reference to the newly discovered freshwater fish genus 'Koima', consider the following statements: 1. It is endemic to the fast-flowing streams of the Cauvery and Kunthi river basins in the Western Ghats. 2. The genus was established to reclassify two loach species previously grouped under broader Southeast Asian genera. 3. The genus is morphologically characterized by a bright blue banding pattern and opaque fins. Which of the statements given above is/are correct?