Updated checklist and distribution of the diaptomid copepods (Copepoda, Calanoida, Diaptomidae) of China

Abstract

We present an updated checklist of the Diaptomidae of China, based on a literature review and on original field data from all over China during 2012-2016. A total of 19 genera and 56 species have been recorded. Neutrodiaptomus has the highest species richness (10 species), followed by Arctodiaptomus (9 species). Only one species each of Eudiaptomus, Mixodiaptomus, Eodiaptomus, Dentodiaptomus, Dolodiaptomus, Allodiaptomus, Karstodiaptomus, Metadiaptomus and Paradiaptomus was found. The taxonomic status of 16 species was revised: one wrongly attributed genus, Argyrodiaptomus, was corrected to Sinodiaptomus. First records for China include Arctodiaptomus parvispineus and one new cave-dwelling genus, Karstodiaptomus, is added. One Latin name from Shen & Sung’s book (1979) is corrected. Remarks on nomenclature and taxonomic issues are supplemented with information on the geographical distribution of the various species within China.

Diversity, Distribution, and Habitat Occurrence of the Diaptomid Copepods (Crustacea: Copepoda: Diaptomidae) in Freshwater Ecosystems of Thailand

“…It is a rare taxon and has been found in lakes and temporary ponds in the northeast of Thailand. This species is also found in Vietnam [32] and southern China [38].…”

“…Allodiaptomus raoi Kiefer, 1936 is an uncommon species that occurrs in lakes, res-ervoirs, rivers, and rice fields in the northeast of Thailand. It was originally described in south India [37] and has been found in Cambodia [23], Vietnam [32], and China [38].…”

“…According to the typical pincer-like processes at the end of the exopod of the male left P5 and a distinct hyaline membrane on the inner margin of the basis of both the left and right P5s in the male (Figure 5B), this species is placed in the genus Arctodiaptomus. The record of this genus in Thailand is unexpected since members of this genus inhabit water bodies across Eurasia, North Africa, and North Asia, including China [38]. In Southeast Asia, only Arctodiaptomus dorsalis (Marsh, 1907) has been recorded in more than 20 lakes in the Philippines [39].…”

“…It is widely distributed in the northeastern region but sporadic in the northern, eastern, and western regions. D. javanus has been found in Cambodia [23], Indonesia [31], Vietnam [32], and southern China [38]. Dentodiaptomus orientalis Sanoamuang and Watiroyram, 2021 is a newly described taxon, recorded from five and six localities in the floodplain of the lower Mekong River Basin in Thailand and Cambodia, respectively [44].…”

“…It is a common species and has been found mostly in permanent water bodies, but sometimes in temporary ponds in the north, northeast, and west of Thailand. It has been reported from Cambodia [23], Bangladesh [50], Vietnam [32], and China [38].…”