Science & Tech 29 October 2026
Scientists Discover 237-Million-Year-Old First Fully Marine Stem Amphibian Fossil 'Gerrothorax maritimus' in China
Why in the News?
Paleontologists have uncovered well-preserved fossils of a **237-million-year-old** ancient creature in Guizhou Province, China, identified as **Gerrothorax maritimus**—the first known fully marine stem amphibian in the fossil record.
Key Features / Major Points:
- Species Identification: Named *Gerrothorax maritimus*, this discovery challenges long-held scientific views by proving that certain early stem amphibians completely adapted to saltwater marine ecosystems.
- Location & Geological Context: Excavated from marine seabed deposits in Guizhou Province, South-Western China, dating back to the **Late Triassic period**.
- Physical Characteristics & Adaptations:
- Measured approximately **74 centimeters** in length.
- Possessed a flattened, broad, disc-shaped body morphology.
- Covered in thick **bony armor plates**, which provided physiological protection against saltwater as well as defense against apex marine predators like Ichthyosaurs.
- Publication: The study was published in the journal **Nature Ecology & Evolution** on October 26, 2026.
Static GK Facts:
- Amphibians: Ectothermic, tetrapod vertebrates transitioning between aquatic and terrestrial environments (e.g., frogs, salamanders).
- Triassic Period: Spanned from ~252 to 201 million years ago (the earliest period of the Mesozoic Era).
- Country Profile (China):
- Capital: Beijing | Currency: Renminbi (Yuan).
- Guizhou Province: Globally renowned for rich marine fossil beds (Lagerstätten) from the Triassic period.
One-Liner Quiz (All Competitive Exams):
Q: In which country was the fossil of the first fully marine stem amphibian, Gerrothorax maritimus, discovered?
A: China (Guizhou Province)
Q: What is the scientific name given to the newly discovered 237-million-year-old marine amphibian?
A: Gerrothorax maritimus
Q: To which geological period do the fossils of Gerrothorax maritimus belong?
A: Late Triassic Period
Q: In which international journal was this paleontological study published in October 2026?
A: Nature Ecology & Evolution
#GerrothoraxMaritimus #MarineAmphibian #China #FossilDiscovery #LateTriassic #CurrentAffairs #StaticGK