Cornigerius lacustris of Lake Hazar, Turkey, a synonym of Cornigerius maeoticus (Pengo) of the Ponto-Caspian (Cladocera: Onychopoda)

Dumont H. J., Vierstraete A., AKBULUT N.

ZOOTAXA, vol.4619, no.1, pp.177-183, 2019 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 4619 Issue: 1
  • Publication Date: 2019
  • Doi Number: 10.11646/zootaxa.4619.1.9
  • Journal Name: ZOOTAXA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.177-183
  • Hacettepe University Affiliated: Yes

Abstract

Cornigerius species are endemic to the Ponto-Caspian, with the exception of Cornigerius lacustris, which is endemic to freshwater Lake Hazar in the Euphrates basin. However, the barcoding fragment of the cytochrome c subunit I (COI) of animals from the type locality shows less than 1 % divergence with Black Sea and less than 2% with Caspian Lake C. maeoticus, the oldest and most widespread species of the genus. Black Sea and Caspian Lake animals show 1.5 % divergence. We therefore place the origin of the Hazar population in the Black Sea. Combined with a variable morphology, we also conclude that C. lacustris is a synonym of C. maeoticus, as already suspected by its describer. Dating the 'lacustris' population is difficult, but it has been there for at least a century.