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Temporal range: Early Triassic
Reconstruction of a Conodont
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Conodonta
Genus: Hindeodus
Species: H. parvus

Hindeodus parvus is a species of the extinct class conodont, whose first appearance in the fossil beds at Meishan, Changxing County, Zhejiang marks the base of the Triassic, and thus the boundary between the Triassic and Permian.

Biostratigraphic significance[edit]

The International Commission on Stratigraphy (ICS) has assigned the First Appearance Datum of Hindeodus parvus as the defining biological marker for the start of the Induan, 252.2 ± 0.5 million years ago, the first stage of the Triassic.


  • Yin Hongfu, Z. K., Tong Jinnan, Yang Zunyi, and Wu Shunbao (2001). "The Global Stratotype Section and Point (GSSP) of the Permian-Triassic Boundary." Episodes 24(2): 12.