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Issue: Vol. 5325 No. 2: 8 Aug. 2023
Type: Article
Published: 2023-08-08
DOI: 10.11646/zootaxa.5325.2.4
Page range: 223-238
Abstract views: 236
PDF downloaded: 14

South-East Asian populations of Karualona cf. karua (King. 1853) (Crustacea: Cladocera: Chydoridae) belong to a separate species

Biological Faculty; Shenzhen MSU-BIT University; No.1; International University Park Road; Dayun New Town; Longgang District; Shenzhen; Guangdong Province; 518172; P.R. China; Biological Faculty; M.V. Lomonosov Moscow State University; Leninskie gory; 119234 Moscow; Russia
Joint Russian-Vietnamese Tropical Center; Street 3 Thang 2; 3; Q10; Ho Chi Minh City; Vietnam; A.N. Severtsov Institute for Problems of Ecology and Evolution; Russian Academy of Sciences; Leninsky pr. 33; Moscow 119071; Russia
Crustacea Cladocera Karualona new species South-East Asia Sri Lanka morphology diversity biogeography

Abstract

Study of populations of Karualona cf. karua (King, 1853) (Сrustacea: Cladocera) from South-East Asia and Sri Lanka revealed that they belong to an undescribed taxon. Karualona fatimae sp. nov. differs from the Australian K. karua s. str. by a very small basal spine of postabdominal claw and the presence of small denticle on the anterior margin of labral keel. The latter character is unique for the genus. Morphology, distribution and phylogenetic position of the new species are discussed. Our data suggest that the diversity of Karualona is underestimated in most tropical regions, with at least one more undescribed taxon present in South-East Asia and one more taxon in Australia. An updated key for genus Karualona Dumont & Silva-Briano, 2000 of the Eastern Hemisphere is provided.

 

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