A new species of Enchytraeus (Enchytraeidae, Oligochaeta) from the profundal of Lake Van, the world's largest soda Lake (Turkey, East Anatolia)
Laen...
Kuupäev
2018
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Magnolia Press
Abstrakt
Enchytraeus polatdemiri sp. nov. (Enchytaeidae, Oligochaeta) was discovered in the framework of a sampling campaign
of the benthic invertebrate fauna of the hyperalkaline Lake Van in Eastern Anatolia, Turkey, the third-largest closed lake
and the largest soda lake on Earth. It was the only oligochaete species found in all samples. DNA sequencing included a
fragment of the mitochondrial cytochrome c oxidase subunit I (COI) gene, and a fragment of the nuclear histone 3 (H3)
gene. For comparison, specimens from laboratory cultures of E. albidus Henle, 1837, a widespread and morphologically
similar species, were sequenced as well. The new species differs from E. albidus in comparatively small body size, 2 or 3
chaetae per bundle, saddle-shaped clitellum, absence of a copulatory field between the male pores and vasa deferentia usu-
ally not extending beyond the clitellum. The individual gene trees of COI and H3, as well as the combined phylogenetic
analysis of both trees, recovered Enchytraeus polatdemiri sp. nov. as a monophyletic group within the genus Enchytraeus,
closely related to E. albidus, but with an average p-distance for COI of 14.5 %. E. polatdemiri sp. nov. may have evolved
from a local population of Enchytraeus albidus, a species well-adapted to changing salinity conditions, or from a common
ancestor into an extremophile species that dwells and reproduces in the profundal of a strongly alkaline soda lake.
The study is supported by ESOGU BAP 106T588.
The study is supported by ESOGU BAP 106T588.
Kirjeldus
Märksõnad
Clitellata, extremophile, aquatic oligochaetes, benthos, integrated taxonomy, Middle East, articles