Core Insights - A new species of freshwater snail, Li Si Guang Ya Tian Luo, has been discovered in Guilin, Guangxi, marking a significant addition to the region's biodiversity [1] - This species was thought to be extinct for nearly a century, having been first identified in 1935 and named after the renowned Chinese geologist Li Si Guang [1] Summary by Categories Discovery and Research - The research was published in the international journal "Zoological Journal" and highlights the discovery of a small living population of the snail species in a river near Guilin [1] - Morphological and molecular systematics studies confirmed that the current population matches the fossilized type specimen of Li Si Guang Ya Tian Luo [1] Historical Context - The species was originally discovered and named in 1935, but had not been seen in nature for almost 100 years until its recent rediscovery [1] - The naming of the species honors Li Si Guang, a prominent figure in Chinese geology, linking the species to a significant historical narrative [1] Biodiversity and Environmental Impact - The discovery of the living population of Li Si Guang Ya Tian Luo serves as a direct indicator of the biodiversity of freshwater species in Guangxi [1] - It also reflects the significant achievements in local water environment management, showcasing the positive impact of conservation efforts [1]

Core Insights - A collaborative research team from Nanchang University and the Kunming Institute of Zoology has systematically studied the gastropod species in Fuxian Lake, resulting in the description of a new genus, Yuanan, which includes four new species endemic to Fuxian Lake, along with four new species under the genus Kunming [1][3][4] Summary by Sections New Species and Genus Identification - The research identified one new genus, Yuanan, and eight new species, which are the Silver Spoon Yuanan, Big Pool Yuanan, Ice Glutinous Yuanan, and Yu Yuan Yuanan under the new genus, as well as the Glass Kunming, Iron Hammer Kunming, Pearl Kunming, and Flowing Fire Kunming under the Kunming genus [3] Morphological and Molecular Evidence - The validity of the new genus and species descriptions is supported by morphological evidence based on shell morphology, micro-sculpture of the shell, and radula structure, along with molecular phylogenetic trees and automated species recognition algorithms that align with morphological studies [3] Evolutionary Insights - Molecular systematics and molecular clock studies indicate that the Yuanan genus diverged from the Kunming genus approximately 13 million years ago, with the Kunming genus having two evolutionary branches, one of which is endemic to Fuxian Lake [3] Biodiversity and Historical Context - The study highlights the high freshwater biodiversity and endemism of Fuxian Lake, increasing the known freshwater mollusk species to 41, and suggests that the lake's formation may date back earlier than previously estimated, challenging earlier geological assessments [4]