Affiliations 

  • 1 A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences; Leninsky Prospect 33; Moscow 119071; Russia. ivan.dadykin@gmail.com
  • 2 Southern Branch of Joint Vietnam-Russian Tropical Science and Technology Research Center; No. 3; 3/2 Street; District 10; Ho Chi Minh City; Vietnam. dinhcnd@gmail.com
  • 3 R.J. Shiel & Assoc.; 3 Hillcrest Ave; Crafers West; SA 5152; Australia. russell@rjshiel.com
  • 4 A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences; Leninsky Prospect 33; Moscow 119071; Russia. alexey-a-kotov@yandex.ru
Zootaxa, 2024 Jun 12;5468(2):331-349.
PMID: 39646174 DOI: 10.11646/zootaxa.5468.2.5

Abstract

During recent years, many taxa of water fleas (Crustacea: Cladocera) with wide distribution ranges were revised and finally accepted as groups of cryptic species. Here we provide a redescription of Ilyocryptus raridentatus Smirnov, 1989 (Anomopoda: Ilyocryptidae). Our study clearly confirms that I. raridentatus belongs to the sarsi-group based on incomplete moulting, absence of dorsal keel, structure of antennule, thoracic limb I and postabdomen. The species is widely distributed in Australia and East Asia (Malaysia, Thailand, Vietnam, Central China, Japan, South Korea) and penetrates north to the Far East of Russia. A morphological variability among different populations of I. raridentatus does not exceed an intrapopulational level. I. raridentatus seems to be a relatively rare species with a benthic lifestyle similar to its congeners.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.