Alekseeva T.M.*, Krivorotkin R.S., Timoshkin O.A. 2025. Redescription of four ostracod species (Ostracoda: Podocopida: Cytherideidae) of the genus Cytherissa Sars, 1925 from Lake Baikal // Arthropoda Selecta. Vol.34. No.2: 216–240 [in English].
Limnological Institute, Siberian Branch, Russian Academy of Sciences, Ulan-Batorskaya str., 3, Irkutsk 664033 Russia.
Tatyana Alekseeva: atm171@mail.ru ORCID https://orcid.org/0000-0001-8928-1491
Roman Krivorotkin: roman_bio@mail.ru ORCID https://orcid.org/0000-0002-2567-6600
Oleg Timoshkin: tim@lin.irk.ru ORCID https://orcid.org/0000-0001-6476-0074
* Сorresponding author
doi: 10.15298/arthsel.34.2.07
ABSTRACT. Illustrated redescriptions of structure of females and males of four species of the genus Cytherissa Sars, 1925: C. truncata Bronstein, 1930, C. parallela Bronstein, 1947, C. lata Bronstein, 1930 and C. sinistrodentata Bronstein, 1930 are presented. Neotypes were identified for all species. The shell structure of these species has been studied in detail using light and scanning electron microscopy. Data on the structure of male hemipenis, brush organs and right L6 of males are presented. All species are endemics of Lake Baikal and are well distinguished from each other by shell structure. The work is based on the rich collections of Lake Baikal ostracods collected by G.F. Mazepova.
KEY WORDS: morphology, Ostracoda, Cytherissa, Baikal endemics.