Vol. 62, 2023

(update: 2023.5.22)

Revision of the Genus Lacunipotamon Dai, Song, He, Cao, Xu & Zhong, 1975 (Crustacea: Decapoda: Brachyura: Potamidae), with Descriptions of Eight New Species from Vietnam

Peter K. L. Ng^1,*, Zhi Wan Tan^1,2, and Van Tri

³

¹Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377, Republic of Singapore. *Correspondence: E-mail: peterng@nus.edu.sg (Ng)
²Department of Biological Sciences, Faculty of Science, National University of Singapore, 16 Science Drive 4, Singapore 117558, Republic of Singapore. E-mail: tzw@nus.edu.sg (Tan)
³National Key Laboratory, Institute of Tropical Biology, Vietnamese Academy of Sciences and Technology, 9/621 Hanoi Highway, Thu Duc City, Ho Chi Minh City, Vietnam. E-mail: trigeckonid@hotmail.com (Ngo).

(Received 22 November 2022 / Accepted 30 January 2023 / Published 22 May 2023)
Communicated by Benny K.K. Chan

The taxonomy of the potamid genus Lacunipotamon Dai, Song, He, Cao, Xu & Zhong, 1975, is revised. Three species are known from southern China: L. albusorbitum Dai, Song, He, Cao, Xu & Zhong, 1975 (type species); L. yuanshi Huang, Shih & Ahyong, 2020; and L. cymatile Huang, Shih & Ahyong, 2020. Eight new species are here described from northern Vietnam: L. globus, L. panda, L. contrastum, L. sublividum, L. mimicum, L. thuanchau, L. pectum and L. purpureum. This is the first record of the genus in Vietnam, with all the new species obtained from karst formations. The species are differentiated by the characters of carapace shape, anterolateral armature, posterior margin of the epistome, male sternopleonal cavity, chelipeds, ambulatory legs, male thoracic sternum, male pleon, and structures of the male first gonopodsand vulvae.

Key words: Potamoidea, New genus record, Rediagnosis, Descriptions of new species, Taxonomy, China, Vietnam, Karst.

Citation: Ng PKL, Tan ZW, Ngo VT. 2023. Revision of the genus Lacunipotamon Dai, Song, He, Cao, Xu & Zhong, 1975 (Crustacea: Decapoda: Brachyura: Potamidae), with descriptions of eight new species from Vietnam. Zool Stud 62:20.doi:10.6620/ZS.2023.62-20.