Deep in the high-altitude evergreen forests of western Thailand, at elevations above 1,300 metres where the terrain is rugged enough to fragment even the hardiest populations, researchers from Chulabhorn Royal Academy and Kasetsart University have described a new species of mountain horned lizard. They named it after a dragon.
The species is Acanthosaura syrax — named after Syrax, Queen Rhaenyra Targaryen’s mount in House of the Dragon. The discovery, published in the open-access journal ZooKeys, brings the total number of known species in the Acanthosaura genus to 23, and the naming choice turns out to be more considered than a simple pop culture nod.
Three Reasons the Name Actually Fits
The researchers, led by Poramad Trivalairat, were deliberate in their choice of Syrax as the namesake. In House of the Dragon, Syrax is known for three things: a striking yellow-gold colouring, a comparatively modest size next to the other dragons in the Targaryen stable, and a notably high number of hatchlings relative to her size.
“The name was not chosen by chance — Acanthosaura syrax shares the same yellow-green coloration, small size relative to its genus, and unusually large clutch size that made Syrax famous.” — Research team, ZooKeys 2026
The real animal reflects all three. A. syrax displays yellowish-green tones across its body, is one of the smallest species in the Acanthosaura genus, and lays clutches of eggs that are large for its body size. The team has proposed “Syrax mountain horned dragon” as the official English common name, with a matching Thai equivalent.
Mountain horned dragons — agamid lizards characterised by spiny crests along their neck and back — are a well-studied group in Southeast Asia. What makes A. syrax distinct from its closest relative, A. lepidogaster, is a combination of features confirmed through DNA analysis: the smallest crest scales recorded anywhere in the genus, a lack of the black eye patch seen in several related species, and a distinctive dark collar marking around the throat.
Found Only in Mae Wong’s High-Altitude Forests
The species has so far been recorded only from Mae Wong National Park, in the Tak-Kamphaeng Phet Province of western Thailand. The lizard appears to live exclusively in the cool, dense evergreen forests above 1,300 metres — habitat that, in this particular region, is naturally fragmented by the rugged mountain terrain.
That limited distribution is a conservation concern the researchers were direct about. Because Acanthosaura syrax appears to exist nowhere beyond this single area, its populations are considered vulnerable. Any significant disturbance to the high-altitude habitat of Mae Wong — whether from deforestation, climate-driven shifts in temperature, or development pressure — could affect the entire known range of the species.
The 23rd in Its Genus — and What DNA Confirmed
Before A. syrax, 22 species were recognised within Acanthosaura, a genus that ranges across parts of South and Southeast Asia. The Thai lizards in this group tend to occupy forest habitats at varying elevations, and the discovery of a new species here is a reminder of how much undescribed biodiversity likely remains in the region’s mountain ecosystems.
Genetic analysis of two genes confirmed what the physical differences suggested: A. syrax is a genuinely distinct species, not simply a regional variant of an already-described form. The study was conducted by Trivalairat and colleagues and published in ZooKeys on 31 July 2026.
The Timing and the Show
The paper’s publication, and the naming announcement that followed, landed just days before the House of the Dragon season three finale aired on 9 August. Whether the timing was deliberate is unclear, but the overlap gave the discovery an additional wave of attention from a fandom already primed to celebrate Syrax.
It’s not the first time a newly described species has been named after a popular culture figure — scientists have previously named animals after Beyoncé, Barack Obama, and David Bowie, among others. But the match between the real animal and its fantasy namesake makes this case more than a gimmick. Acanthosaura syrax earned the name on its own terms.
