Mesalina Bishnoi: New Lizard Species Found in India

Context:

The Zoological Survey of India (ZSI) and independent wildlife researchers have recently discovered an entirely new species of lizard, Mesalina bishnoi, in Gajner, Bikaner district of Rajasthan. This discovery highlights previously unexplored aspects of desert biodiversity and underscores the ecological richness of the Thar Desert.

Background and Recent Discovery:

In 1935, British zoologist Malcolm A. Smith reported the presence of the genus Mesalina in the Jaisalmer region. However, due to the absence of a physical specimen, the record remained unverified and existed only in scientific literature. Recently, researchers collected specimens from a rocky desert landscape near Bikaner and conducted detailed genetic analyses. This has provided the first official and scientifically validated evidence of the presence of the genus Mesalina in India.

About Mesalina bishnoi:

• • • Discovery and Location: Mesalina bishnoi was discovered near Gajner in Bikaner district, Rajasthan, within the Thar Desert region of India.
    • Habitat: The species inhabits a harsh desert ecosystem characterized by rocky and compact soil, sparse vegetation, and an extremely arid climate.
    • Taxonomic Identity: It is a newly identified species belonging to the genus Mesalina. Lizards of this genus are generally small, fast-moving, and diurnal (active during the day).
    • First Record in India: This discovery represents the first confirmed occurrence of the genus Mesalina in India, supported by specimen-based scientific evidence.
    • Significance of the Name: The species has been named “bishnoi” in honor of the Bishnoi community of Rajasthan, renowned for its long-standing tradition of wildlife conservation and environmental protection.
    • Physical Size: It is a small-bodied lizard with a snout-to-vent length of approximately 39.2 mm.
    • Coloration and Pattern: Its body is grey to olive-brown in color, featuring lateral stripes, black markings behind the eyes, and a distinctive pattern of dark spots interspersed with white dots.

Major Monitor Lizard Species Found in India:

Monitor lizards belong to the family Varanidae and are among the most intelligent reptiles. In India, all monitor lizard species are protected under Schedule I of the Wildlife (Protection) Act, 1972, making hunting, capture, or trade a serious legal offense.

• • • Bengal Monitor (Varanus bengalensis): Widely distributed across forests, agricultural landscapes, and urban fringes throughout India.
    • Asian Water Monitor (Varanus salvator): The second-largest lizard species in the world, commonly found in mangroves and wetlands, including the Sundarbans.
    • Yellow Monitor (Varanus flavescens): Occurs mainly in the floodplains and wet grasslands of northern and eastern India.
    • Desert Monitor (Varanus griseus): Adapted to arid environments and found primarily in the Thar Desert and parts of Gujarat.

Conclusion:

The discovery of Mesalina bishnoi represents a significant addition to India’s reptilian biodiversity. It not only enhances scientific understanding of desert-dwelling species but also demonstrates that the Thar Desert remains a biologically rich ecosystem with immense potential for new discoveries. The finding reinforces the importance of continued biodiversity exploration, taxonomic research, and conservation efforts in India’s arid landscapes.