Russell Train’s Marble Gecko – Gekko russelltraini – Ngo Van Tri, Bauer, Wood & JL Grismer, 2009

Science name: Gekko russelltraini – Ngo Van Tri, Bauer, Wood & JL Grismer, 2009

Taxonomic:  Animalia>> Chordata>> Reptilia>> Squamata >> Gekkonidae >> russelltraini

Species status: Endemic ; IUCN status: VU (Vunerable)

Description: Physical characteristics: Gekko russelltraini is a medium-sized gecko with a snout-vent length (SVL) ranging from 70.3 to 82.9 mm. Males possess 8–11 precloacal pores. The species has 12–16 longitudinal rows of weakly enlarged, smooth dorsal tubercles. The dorsal side exhibits a pattern of 5–7 white vertebral blotches between the nape and sacrum, with 4–7 pairs of short white bands on the flanks between limb insertions.

Coloration and Appearance: The gecko’s body is adorned with a series of white markings, including 5–7 vertebral blotches along the midline and short white bands on the sides. Its tail displays alternating light and dark bands.

Distribution and habitat: Elevation: Found at elevations between 100 and 500 meters above sea level.
Area: Gekko russelltraini is native to southeastern Vietnam, specifically known from Chua Chan Mountain in Suoi Cat Commune, Xuan Loc District, Dong Nai Province. Its range is estimated to cover approximately 18 km².
Habitat: This species inhabits subtropical/tropical moist lowland forests and is often associated with caves and rocky surfaces. It is usually found on lianas, shrubs, and trees, particularly figs, using caves as diurnal shelters and for egg-laying.

Behaviour and ecology: Lifestyle: This species is nocturnal and arboreal, active at night while foraging on rocky surfaces, trees, and shrubs. During the day, it hides in caves and rocky crevices. It feeds on various insects and other small arthropods in its forest habitat.

Reproduction: Gekko russelltraini is oviparous, laying clutches of 2–4 eggs in cave crevices and rocky areas. The reproductive season typically coincides with the onset of the rainy season.

Conservation and status: IUCN Red List Category and Criteria: Listed as Vulnerable (VU) due to its very restricted range (around 18 km²) and potential future threats from habitat change, such as quarrying activities, which could quickly lead to a decline in its population.

Threats: The primary threat to this species is habitat disturbance from nearby plantations and potential quarrying activities. Although it is presently common in its known habitat, future habitat changes could pose significant risks.

Conservation actions: Conservation efforts should focus on protecting the species’ habitat from further degradation, especially by regulating quarrying and habitat destruction. Monitoring population trends and ensuring habitat protection are crucial for its long-term survival.