theIASHub | 19 Jul, 2025 | 17
Cnemaspis Brahmaputra : Recently, in a remarkable zoological discovery, researchers identified a new species of gecko—Cnemaspis brahmaputra—from the riverbanks of Assam, India.
o The species was discovered near the Dirgheswari Temple, located on the northern bank of the Brahmaputra River.
o Its presence in Assam points to an ancient biogeographic link between Sri Lanka and Northeast India, highlighting historical faunal exchange across the subcontinent.
o Distinctive Evolutionary Traits: The species is genetically and morphologically distinct from its Sri Lankan relatives, indicating significant evolutionary divergence.
ü Strengthens the understanding of regional endemism and evolutionary history in the Brahmaputra valley.
o Unique Features : Larger body size compared to related species.
ü Fewer mid-body scale rows but more ventral scale rows across the belly.
ü No tubercles on the lower flanks.
ü Presence of three enlarged rows of thigh scales, aligned parallel to the enlarged femoral scale row.
o The first species, Cnemaspis assamensis, was described in 2000.
o Both species are part of the podihuna clade and are restricted to the Brahmaputra River valley.
o Interestingly, the two species occur on opposite banks of the river and show significant genetic differences, emphasizing localized speciation.
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