Zoological Studies

Vol. 60, 2021

(update: 2021.08.18)

The Hillstream Decapod Crustaceans of Shenzhen, China, with Description of a New Species of Freshwater Crab (Crustacea: Brachyura: Potamidae) of the Genus Megapleonum Huang, Shih & Ahyong, 2018

Chao Huang1,* and Siying Mao2


1Australian Museum, 1 William St, Sydney NSW 2010, Australia. *Correspondence: E-mail: chaohuang1777@yahoo.com
2Unaffiliated, Guangdong, China. E-mail: maosiying1994@gmail.com (Mao)

Received 29 July 2021 / Accepted 3 August 2021
Communicated by Benny K.K. Chan

Freshwater decapod crustaceans are often the keystone species in their habitats and are ecologically important. The freshwater hillstream decapods of Shenzhen City, Guangdong, China, were systematically surveyed for the first time from June to September 2019. We identified a total of 19 decapod species from 10 genera and 6 families. Of these, one Macrobrachium species and one potamid species could not be assigned to any known species. The latter clearly belongs to the monotypic genus Megapleonum Huang, Shih & Ahyong, 2018, and resembles the type species M. ehuangzhang in general external morphology. Striking differences in male gonopodal morphology along with genetic evidence based on mitochondrial 16S rDNA sequences strongly suggest this species as distinct from the type species and it is herein described as Megapleonum shenzhen n. sp. Our survey data sheds light on the biodiversity of hillstream decapods in Shenzhen and highlights areas of conservation interest.

Key words: Aquatic fauna, Decapoda, Freshwater crab, Freshwater shrimp, New species, Potamidae, Systematics.

Citation: Huang C, Mao SY. 2021. The hillstream decapod crustaceans of Shenzhen, China, with description of a new species of freshwater crab (Crustacea: Brachyura: Potamidae) of the genus Megapleonum Huang, Shih & Ahyong, 2018. Zool Stud 60:66.

Supplementary materials: Fig. S1Table S1