Sakaerat bent-toed gecko discovered in Thailand’s dense forests: A mysterious new reptile species with rare traits

A remarkable new species of gecko has been discovered in northeastern Thailand, captivating herpetologists and wildlife enthusiasts alike. Named Cyrtodactylus sakaeratensis, or the Sakaerat bent-toed gecko, this slender lizard is distinguished by its curved fingers, bold banding, and unique adaptations for forest life. The discovery, published in Zootaxa, led by Natee Ampai of Srinakharinwirot University was confirmed through careful DNA analysis and morphological measurements, highlighting the ongoing diversity and ecological complexity of Southeast Asia’s reptiles.

Cyrtodactylus sakaeratensis: A distinctive gecko, with curved fingers, found in Sakaerat Biosphere Reserve

The Sakaerat Biosphere Reserve, a UNESCO-recognised site located roughly 150 miles northeast of Bangkok, is home to dry evergreen forests, mixed deciduous woods, and dry dipterocarp habitats. This protected area provides an ideal environment for species that remain hidden during the day and forage at night.The newly discovered gecko measures approximately 2.5 to 3.3 inches from snout to vent, with light brown bodies and dark brown bands edged in yellow. Its head is moderately wide with a long snout and large brown eyes rimmed by yellow scales. Unlike many geckos, C. sakaeratensis relies on strong claws rather than broad sticky pads, allowing it to grip coarse bark and twigs effectively.

How scientists identified it as a new species

Researchers employed integrative taxonomy, combining body measurements, scale counts, and genetic sequencing to determine that this gecko was previously unrecognised.Genetic analysis: Sequencing of the mitochondrial ND2 gene revealed 6–29% divergence from closely related species, a range consistent with a separate species.Morphological traits: Scale counts along the lips, rows of tubercles on the back, and the arrangement of plates under the fourth toe helped distinguish it from similar species.This combination of genetic and physical evidence warranted the formal scientific naming of Cyrtodactylus sakaeratensis.

How gecko toe adaptations aid nighttime hunting and predator evasion

Curved digits are a hallmark of many forest-dwelling geckos, enabling them to grip narrow branches, rough bark, and small crevices. In C. sakaeratensis, claws provide mechanical grip where traditional gecko toe pads are reduced. These adaptations are essential for climbing trunks, evading predators, and hunting at night.

Notable features of Cyrtodactylus sakaeratensis, the new gecko discovered

Cyrtodactylus gecko discoveries highlight cryptic species in Thailand

Thailand’s bent-toed geckos have a history of hidden diversity. A 2021 study revealed significant cryptic variation in northern and western Thailand, indicating that many distinct lineages remain undetected. Discoveries like C. sakaeratensis highlight the importance of:Conducting careful surveys in protected areas.Combining DNA testing with classic morphological analysis for accurate species identification.Understanding the ecological needs and adaptations of species with narrow ranges.

Why new Cyrtodactylus discoveries highlight the importance of habitat research

The Cyrtodactylus genus is one of the most species-rich and ecologically diverse groups of geckos in Southeast Asia, spanning forests, limestone caves, granite outcrops, and islands. Each new species discovery adds to our understanding of biodiversity and underlines the importance of continued research in underexplored habitats.While formal naming does not establish conservation status, it lays the groundwork for future studies on population size, distribution, and potential threats, which are essential for protecting these unique reptiles.Also read | The whiskered hunters: How seals use their sensitive whiskers to track and follow escaping fish