Redescription of Streptaxis mouhoti Pfeiffer, 1863 and Streptaxis strangulatus Möllendorff, 1894 (Eupulmonata: Streptaxidae) from Peninsular Thailand and Their Assignment to a New Genus


  • Sittichai Chunkhajorn Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, THAILAND
  • Pongpisit Rungruangdejwattana Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, THAILAND
  • Chirasak Sutcharit Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, THAILAND
  • Thanit Siriboon Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, THAILAND


carnivorous snail, endemic species, genitalia, limestone, systematics


Two species of the family Streptaxidae found in Peninsular Thailand are redescribed and assigned to a new genus, Panhartemis gen. nov. The new genus has two new distinctive species, Panhartemis strangulatus comb. nov. and Panhartemis mouhoti comb. nov., from isolated limestone karsts in western Thailand. Panhartemis Siriboon, gen. nov. exhibits an oblique-cylindrical shell shape, elevated conical spire, last whorl slightly axially deflected, and penial hooks separated by elevated reticulated folds; none of these characteristics occur in other streptaxids. Details of the genital anatomy and the radula of the two species are provided for the first time. The current study advances knowledge of the streptaxid land snail species in Peninsular Thailand and emphasizes the value of limestone habitats for preserving biodiversity.


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How to Cite

Chunkhajorn, S. , Rungruangdejwattana, P. , Sutcharit, C. and Siriboon, T. 2023. Redescription of Streptaxis mouhoti Pfeiffer, 1863 and Streptaxis strangulatus Möllendorff, 1894 (Eupulmonata: Streptaxidae) from Peninsular Thailand and Their Assignment to a New Genus. Tropical Natural History. 7 (May 2023), 187–202.



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