Korovchinsky N.M. 2025. Ctenopoda (Crustacea: Cladocera) of Jeju Island (South Korea), with comments on taxonomic composition of the order of the whole country // Invert. Zool. Vol.22. No.3: 439–446 [in English].
A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Leninsky prospect 33, Moscow 119071 Russia.
Nikolai Korovchinsky: nmkor@yandex.ru ORCID: https://orcid.org/0000-0003-2824-0981
doi: 10.15298/invertzool.22.3.05
ABSTRACT. A review of the taxonomic composition of Cladocera (Crustacea) of the order Ctenopoda of the large Jeju Island (the southernmost territory of South Korea) has been provided. A reassessment of the species composition of representatives of this order has been carried out, revealing the occurrence of six species — Diaphanosoma cf. brachyurum, D. amurensis, D. sarsi, D. dubium, Sida cf. americana, and Pseudosida szalayi. Three former species are so far only known from the island. Sida cf americana and D. cf. brachyurum require further systematic revision. A critical review of the knowledge of all known representatives of Ctenopoda in South Korea is provided with an assessment of the validity of each taxon of species and subspecies rank. The Ctenopoda fauna of Jeju Island is significantly impoverished as compared to the mainland, with 6 species compared to 10(12?), which is typical of insular fauna in general. The fauna of the order on the island is mixed, with roughly equal proportions of boreal northern and tropical southern species, corresponding to its location in a wide transition zone between boreal and tropical Cladoceran complexes.
KEY WORDS: Jeju Island, South Korea, Cladocera, Ctenopoda, species composition, systematic and faunistic revision.