This treatment validates Thaipotamon nandidarbhai as a new freshwater-crab species from Sung Men District, Phrae. A holotype is designated and diagnostic carapace, surface, and strongly curved male gonopod characters are documented. Earlier names used in Thai reports and media lacked ICZN requirements, and the new treatment regularises the nomenclature.
Key findings
- A Phrae specimen was formally designated as the holotype. • Distinctive G1 curvature and external morphology separate the species from relatives. • The treatment resolves a long history of locally circulated but unavailable names.
Why this matters globally
Formal recognition adds northern Thailand’s freshwater-crab diversity to international taxonomic records and provides a foundation for distribution, evolutionary, and habitat-protection research.
Thai researcher contribution
Phaibul Naiyanetr of Chulalongkorn University, together with the discovery history involving Sermsak Nandidarbha, reflects sustained Thai contributions to collecting, diagnosing, and formalising local biodiversity.
Limitations to consider
The description centres on a single male holotype and morphology. The Zenodo treatment does not resolve intraspecific variation, distribution limits, genetics, ecology, or extinction risk.