The name of a dragon from a fantasy drama has entered the real-world biological classification system. A small horned lizard discovered in the high-altitude evergreen forests of Mae Wong National Park in western Thailand has been described as a new species, Acanthosaura syrax*Acanthosaura syrax*. House of the Dragon While the name was inspired by the dragon ‘Syrax’ from the drama, the classification of the new species was based on the morphology of eight type specimens and two mitochondrial genes, rather than pop culture.
The original paper was published in an open-access journal on July 31, 2026, ZooKeys and garnered renewed attention through follow-up reports by international science media outlets between August 23 and 25. The research team identified characteristics such as a small body size, the smallest nuchal and dorsal ridge scales within the *Acanthosaura* genus, and a unique pattern; sequence analyses of ND2 and COI genes supported a distinct lineage separate from other congeneric species.
30-Second Summary
- Acanthosaura syrax*Acanthosaura syrax* is a new species described from the high-altitude evergreen forests of Mae Wong National Park in western Thailand.
- Eight specimens secured during two field surveys in 2025 formed the basis of the type series.
- Morphological comparisons and analyses of mitochondrial ND2 and COI genes were used in conjunction.
- “Genetic distances from other congeneric species ranged from 14.1% to 15.9% for the ND2 gene and from 14.96% to 28.13% for the COI gene.
- “Its currently known distribution is limited to narrow high-altitude forests above 1,300 m, but population trends and IUCN status have not yet been determined.
What happened?
On April 23, 2025, the research team collected three specimens of a small horned lizard in Mae Wong National Park that did not match existing regional species lists; a follow-up survey of the same area one month later yielded five additional specimens. These eight individuals—comprising an adult male holotype and male and female paratypes—were used for morphological measurements and molecular phylogenetic analysis.
The type locality was recorded at an elevation of 1,340 m in the Mae Wong area of Kamphaeng Phet Province, Thailand. According to the researchers and the publisher, confirmed habitats are concentrated in evergreen forests above 1,300 m in Mae Wong National Park. With this description, Acanthosaura the number of known species in the genus has reached 23.
Target Species Information
| Category | Details |
|---|---|
| Common Name | No official Korean name; referred to in the text as ‘Syrax mountain horned dragon’ based on the proposed English name. |
| English name | Syrax mountain horned dragon (proposed by researchers) |
| Scientific name | Acanthosaura syrax Trivalairat et al., 2026 |
| Classification | Order Squamata · Family Agamidae · Acanthosaura Genus |
| Confirmed distribution | High-altitude evergreen forests in Mae Wong National Park, western Thailand; currently known records are from elevations above 1,300 m. |
| Type locality | Mae Wong area, Kamphaeng Phet Province; elevation 1,340 m |
| Conservation Status | IUCN assessment status unconfirmed; insufficient data on population size and trends. |
How was it confirmed as a new species?
1. Morphological comparison
The researchers compared the type specimen’s body shape, scale count and size, ridges on the neck and back, patterns around the eyes, and neck color bands with those of other Acanthosaura species. A. syrax It has a generally small physique and possesses the smallest nuchal and dorsal ridge scales recorded within the genus to date. It lacks the black spots around the eyes seen in several related species and displays a distinct dark collar pattern on the neck.
2. ND2 and COI gene analysis
Moving beyond morphological differences, we conducted Maximum Likelihood and Bayesian phylogenetic analyses using mitochondrial ND2 and COI sequences. In both gene analyses, the new species was recovered as a distinct monophyletic lineage. Maximum Likelihood support values were 76% for ND2 and 99% for COI, while Bayesian posterior probabilities were 0.78 and 1.00, respectively.
Intraspecific variation was low—0–0.01% for ND2 and 0–0.34% for COI—whereas the genetic distance from other congeneric species ranged from 14.1–15.9% for ND2 and 14.96–28.13% for COI. This divergence, combined with morphological differences, supports the distinct status of the new lineage. Crucially, the species classification was not based solely on genetic distance but was determined by integrating data from the type specimen, morphology, and phylogenetic analysis.
“Why was it named ‘Sirax’?
Researchers linked the new lizard’s characteristics—specifically its yellowish-hued coloration, smaller physique compared to other dragons, and high reproductive rate—to the dragon Syrax from the drama. In reality, A. syrax it exhibits a yellowish-green tint and a small body size, and descriptions note its trait of laying a large number of eggs relative to its build. While this provided the inspiration for a memorable name, the scientific basis for validating the species name lies in morphological diagnosis, type specimens, and molecular phylogenetic analysis.
Why is this important?
First, it demonstrates that the biodiversity of Southeast Asia’s high-altitude forests has not yet been fully documented. Even a lizard with distinctive spiny scales had not been recognized as a distinct species until recently, due to its restricted altitudinal range and the region’s rugged terrain.
Second, taxonomy alters conservation units. If a species previously thought to be widely distributed actually consists of several isolated species, the amount of habitat at risk for each individual species is significantly smaller. The research team A. syrax proposed the possibility of using it as a flagship species for the conservation of the Mae Wong high-altitude forests.
Third, the combination of physical specimens and DNA data is crucial. Rather than relying solely on a “numerical phylogeny” based on sequence differences, the study produced both type specimens—permanently preserved in a museum—and morphological diagnoses that allow for future verification. If specimens from other regions are discovered later, their distribution and variations can be compared using the same criteria.
Points to avoid overinterpreting
- The fact that its currently known range is limited does not automatically mean it should be classified as an “endangered species.”
- The eight type specimens used to diagnose the species do not necessarily represent the total population size or long-term population trends.
- ND2 and COI is a mitochondrial marker. Analyses of the nuclear genome and broader geographic sampling could further verify phylogenetic relationships.
- Captive husbandry conditions—such as temperature, humidity, diet, or breeding methods—should not be assumed based solely on research into a new species in the wild.
- Rarity and a catchy common name do not justify the pet trade.
Study limitations and remaining questions
The most significant gaps concern distribution and population status. Further research is needed to determine if populations exist at other elevations in the Maewong Range or in adjacent forests, the extent to which gene flow is restricted by rugged terrain, and how detection rates vary seasonally. Data on habitat area, population size, and decline trends are required for an IUCN assessment.
Morphologically similar A. lepidogaster Broader sampling of other related species and the addition of nuclear DNA data would allow for a more precise explanation of the timing of speciation and the effects of geographic isolation in high-altitude forests. This paper is not a final conclusion but rather a baseline for future comparisons.
Key takeaways for readers
- The ‘dragon’ name adds an element of interest, but the classification of the new species was based on morphology and DNA analysis.
- Analyses of eight type specimens and ND2/COI markers supported the existence of a distinct lineage.
- The species has currently been confirmed at elevations above 1,300 m, and its known distribution is very limited.
- Its IUCN status and population trends have not yet been determined.
- The moment it was given a new name, the need for distribution surveys and the protection of high-altitude forests became even more apparent.
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Original source, DOI, and references
- Trivalairat et al. (2026), ZooKeys 1287: 47–76 — DOI: 10.3897/zookeys.1287.186636
- PubMed PMID 42571307 — Cross-verification of abstract, bibliographic, and figure data
- Official description by Pensoft Publishers (2026-08-10)
- “Discover Magazine — Details of collection and researcher commentary (2026-08-10)
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