📜 Specimen Data
Layer:
Cíyíng Fm
Sample Age:
N2
Scale:
20-15-11 (mm)
Sur-rock:
Yellow fluvial and lacustrine deposits
Locality:
Ciying Town, Qilin District, Qujing City, Yunnan Province, China
Date Collected:
2026-6-11
Collected by:
OpenShell
🔬 Taxonomy
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda-Prosobranchia
Order:
Mesogastropoda
Family:
Viviparidae
Genus:
Tchangmargarya
Species:
sp
IUCN Status:
Not specified
❧ ❧ ❧
✻ ✻ ✻
Notes & Observations
The surrounding rock of the specimen is yellow siltstone, characteristic of a fluviolacustrine facies with a well-developed granular sedimentary structure. According to the national 1：5,000,000 geological map, the site is assigned to the Pliocene N₂ stratum. It is inferred that this locality represents the ancestral lineage of Tchangmargarya, which dispersed into the lake from the ancient Nanpanjiang River system.
The surrounding rock of the specimen is yellow siltstone, characteristic of a fluviolacustrine facies with a well-developed granular sedimentary structure. According to the national 1：5,000,000 geological map, the site is assigned to the Pliocene N₂ stratum. It is inferred that this locality represents the ancestral lineage of Tchangmargarya, which dispersed into the lake from the ancient Nanpanjiang River system.