Cavernicolous trechine beetles of the genus Tonkinaphaenops Deuve, 2013, known so far only from Vietnam, are reported for the first time from southern China, and new data are also provided regarding this genus from northern Vietnam. Two new Chinese species, T. yinquanicus sp. nov. from cave Yinquan Dong and T. jingxicus sp. nov. from cave Nianluo Dong in Jingxi County, southwesternmost Guangxi Zhuang Autonomous Region, are described and illustrated, together with the descriptions of two new Vietnamese species: T. anthonyi sp. nov. from the cave Hang Dõi and T. impunctatus sp. nov. from the cave Hang Rắn in Cao Bằng province. A key to all known species of Tonkinaphaenops is also provided.

Keywords: Coleoptera, cavernicolous, aphaenopsian, ground beetles, new species, Trechini

Sunbin Huang, Vương Tân Tú, Phạm Văn Phú, Mingyi Tian and Arnaud Faille. 2019. Contributions to the Knowledge of the Genus Tonkinaphaenops Deuve, 2013 from China and Vietnam (Coleoptera: Carabidae: Trechinae). Zootaxa. 4701(1); 35–53. DOI: 10.11646/zootaxa.4701.1.3