New Gecko Species
The discovery of a new gecko species in Assam has attracted attention in biodiversity circles. Named *Cnemaspis brahmaputra*, this diurnal reptile was found near the Dirgheswari Temple on the northern bank of the Brahmaputra River. Its identification provides fresh insight into the biogeography and evolutionary history of reptiles in northeast India.
Discovery and Identification
*Cnemaspis brahmaputra* is a day-active gecko, unlike most nocturnal species in the region. It belongs to the *Cnemaspis podihuna* clade, previously thought to be limited to Sri Lanka. The species was described by a team of researchers from India and Indonesia. It is genetically and morphologically distinct from its Sri Lankan relatives, showing evolutionary divergence. Key features include a larger body size, fewer mid-body scale rows, more ventral scales, absence of tubercles on lower flanks, and unique thigh scale arrangements.
Biogeographic Significance
The discovery strengthens evidence of ancient faunal connections between northeast India and Sri Lanka. It marks historical species exchanges across the Indian subcontinent. The Brahmaputra River acts both as a barrier and a corridor for evolutionary processes, shaping species distribution. The new gecko is the second *Cnemaspis* species found in the Brahmaputra valley, with *Cnemaspis assamensis* described in 2000 on the opposite riverbank. Both species show genetic differences, indicating long-term separation.
Ecological and Cultural Importance
The species was named after the Brahmaputra River, recognising the river’s ecological and cultural role in northeast India. The river supports diverse habitats and influences local biodiversity. It also holds spiritual and cultural significance for communities living along its banks. The discovery puts stress on the need to conserve riverine ecosystems that harbour unique and endemic species.
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