Abstract
Four species of freshwater crabs from three genera and two families (Cantopotamonhengqinense Huang, Ahyong & Shih, 2017, Nanhaipotamonguangdongense Dai, 1997, Nanhaipotamonmacausp. n., and Somanniathelphusazanklon Ng & Dudgeon, 1992) are documented from Macau for the first time. One new species, Nanhaipotamonmacausp. n., is described. The large flap on the male first gonopod terminal segment sets it apart from all other known congeners except N.wupingense Cheng, Yang, Zhong & Li, 2003, from Fujian. Characters of the carapace, male first gonopod and size, however, clearly differentiate these two species. Preliminary genetic studies also suggest that the two are not closely related. A neotype is designated for N.wupingense. The taxonomic status of Nanhaipotamonguangdongense is also discussed. Notes on the general biology and conservation status of these crabs are also included.
Highlights
Best known as the gambling capital of the world, Macau has a total land area of only 30.8 km2 but a population of more than 650,000 people, making it one of the most densely populated regions in the world (Government of Macao Special Administrative Region Statistics and Census Service)
Macau historically consists of the Macau Peninsula and two islands: Taipa and Coloane
It was found that these freshwater crab specimens contained three species, Cantopotamon hengqinense Huang, Ahyong & Shih, 2017, Somanniathelphusa zanklon Ng & Dudgeon, 1992, and a new species of Nanhaipotamon Bott, 1968
Summary
Best known as the gambling capital of the world, Macau ( known as Macao) has a total land area of only 30.8 km2 but a population of more than 650,000 people, making it one of the most densely populated regions in the world (Government of Macao Special Administrative Region Statistics and Census Service). It was found that these freshwater crab specimens contained three species, Cantopotamon hengqinense Huang, Ahyong & Shih, 2017, Somanniathelphusa zanklon Ng & Dudgeon, 1992, and a new species of Nanhaipotamon Bott, 1968. Three species of potamid crabs, Cantopotamon hengqinense Huang, Ahyong & Shih, 2017, Nanhaipotamon guangdongense Dai, 1997, and Nanhaipotamon macau sp.
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