title: On Eulimnogammarus messerschmidtii, sp. n. (Amphipoda: Gammaridea) from Lake Baikal, Siberia, with redescription of E. cyanoides (Sowinsky) and remarks on taxonomy of the genus Eulimnogammarus.
abstract: A new amphipod species of the endemic fauna of Lake Baikal (East Siberia, Russia), Eulimnogammarus messerschmidtii sp. n., from the littoral zone of the northern part of the lake is described. The species is characterized by the presence of a group of spines with dense setae on the last 4 body segments. The basal peduncular segment of antenna 1 bears bunches of dense setae without spines, uropods 3 are covered by dense simple setae without plumose setae and the outer ramus has a second small article. The body length of sampled specimens ranges from 7.5 to 18 mm. Population analysis at one of the sampling points revealed a spring-summer reproduction period for this species. This species was previously erroneously identified as E. cyanoides. E. cyanoides is here redescribed in details based on the lectotype. The differences between E. messerschmidtii sp. n., E. cyanoides and other closely related Eulimnogammarus species are described. The taxonomy of the genus Eulimnogammarus is discussed.
authors.affiliation: Scientific Research Institute of Biology at Irkutsk State University, Irkutsk 664003, Russia.; Email: daria.bedulina@gmail.com.
authors.forename: Daria S
authors.initials: DS
authors.lastname: Bedulina
authors.affiliation: Scientific Research Institute of Biology at Irkutsk State University, Irkutsk 664003, Russia. Department of Invertebrate Zoology and Hydrobiology at Irkutsk State University, Irkutsk 664003, Russia.; Email: Amphipoda@yandex.ru.
authors.forename: Vadim V
authors.initials: VV
authors.lastname: Takhteev
authors.affiliation: National Museum of Natural History, Kiev 01601, Ukraine.; Email: slava.pogrebnyak@gmail.com.
authors.forename: Svyatoslav G
authors.initials: SG
authors.lastname: Pogrebnyak
authors.affiliation: Scientific Research Institute of Biology at Irkutsk State University, Irkutsk 664003, Russia.; Email: unknown.
authors.forename: Ekaterina B
authors.initials: EB
authors.lastname: Govorukhina
authors.affiliation: Scientific Research Institute of Biology at Irkutsk State University, Irkutsk 664003, Russia.; Email: unknown.
authors.forename: Ekaterina V
authors.initials: EV
authors.lastname: Madyarova
authors.affiliation: Scientific Research Institute of Biology at Irkutsk State University, Irkutsk 664003, Russia.; Email: unknown.
authors.forename: Yulia A
authors.initials: YA
authors.lastname: Lubyaga
authors.affiliation: Scientific Research Institute of Biology at Irkutsk State University, Irkutsk 664003, Russia.; Email: unknown.
authors.forename: Kseniya P
authors.initials: KP
authors.lastname: Vereshchagina
authors.affiliation: Scientific Research Institute of Biology at Irkutsk State University, Irkutsk 664003, Russia.; Email: unknown.
authors.forename: Maxim A
authors.initials: MA
authors.lastname: Timofeyev
authors.affiliation: UFZ Helmholtz Centre for Environmental Research, Department of Bioanalytical Ecotoxicology, Permoserstr.15, Leipzig 04318, Germany.; Email: till.luckenbach@ufz.de.
authors.forename: Till
authors.initials: T
authors.lastname: Luckenbach
mesh_terms: D033304:Amphipoda / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D017753:Ecosystem; D005260:Female; D060106:Lakes; D008297:Male; D009929:Organ Size; D012800:Siberia