The lined leaf chameleon (Brookesia lineata) is a species of chameleon endemic to Madagascar. It belongs to the genus Brookesia, commonly known as leaf chameleons or pygmy chameleons, which are renowned for their small size and exceptional camouflage, mimicking dead leaves and twigs in the forest undergrowth.
Taxonomy
- Kingdom: Animalia
- Phylum: Chordata
- Class: Reptilia
- Order: Squamata
- Family: Chamaeleonidae
- Genus: Brookesia
- Species: B. lineata
- Binomial name: Brookesia lineata (F. Werner, 1904)
Etymology
The specific epithet "lineata" is Latin for "lined" or "striped," referring to the subtle linear patterns or rows of tubercles often present along the dorsal aspect of this species.
Description
Brookesia lineata is a very small chameleon, typically reaching a total length of only 3 to 5 centimeters (1.2 to 2 inches), making it one of the smaller members of the genus. Its body is flattened laterally and often exhibits a jagged, segmented appearance along its back, which further aids in its leaf-litter camouflage. The coloration is usually dull browns, grays, or tans, sometimes with lighter vertebral lines or rows of tubercles that give it a "lined" appearance. Like other Brookesia species, it possesses a short, non-prehensile tail, which is another adaptation for its terrestrial lifestyle in the leaf litter.
Distribution and Habitat
This species is endemic to northern Madagascar. Its known distribution includes rainforests in areas such as Montagne d'Ambre National Park and Marojejy National Park. Brookesia lineata is primarily found in the humid lowland and montane rainforests, where it inhabits the leaf litter on the forest floor. It relies heavily on this microhabitat for both camouflage and foraging.
Behavior and Ecology
Like other Brookesia chameleons, Brookesia lineata is largely diurnal, spending its days foraging for small invertebrates such as insects and their larvae, as well as isopods and other tiny arthropods among the fallen leaves. Its movements are slow and deliberate, enhancing its cryptic nature. When threatened, it typically remains motionless, relying on its camouflage, or may drop to the ground and feign death. At night, it often climbs onto low-lying vegetation, such as small shrubs or blades of grass, to sleep, presumably to avoid ground-dwelling predators.
Conservation Status
According to the IUCN Red List of Threatened Species, Brookesia lineata is assessed as "Least Concern" (LC). This assessment, last conducted in 2011, is due to its occurrence in well-protected areas, such as national parks, where its habitat is relatively secure. However, its small distribution range and reliance on specific forest habitats mean that it remains vulnerable to habitat degradation and deforestation outside of these protected zones. Efforts to protect Madagascar's remaining rainforests are crucial for the long-term survival of this and many other endemic species.