TY - JOUR

T1 - Two Radix spp. (Gastropoda

T2 - Lymnaeidae) endemic to thermal springs around Lake Baikal represent ecotypes of the widespread Radix auricularia

AU - Aksenova, Olga

AU - Vinarski, Maxim

AU - Bolotov, Ivan

AU - Kondakov, Alexander

AU - Bespalaya, Yulia

AU - Tomilova, Alyona

AU - Paltser, Inga

AU - Gofarov, Mikhail

PY - 2017/11/1

Y1 - 2017/11/1

N2 - In this study, we re-examine two species of freshwater gastropods of the genus Radix Montfort, 1810 (family Lymnaeidae), endemic to the geothermal springs in the Lake Baikal region in the southern part of eastern Siberia — Lymnaea (Radix) hakusyensis Kruglov et Starobogatov, 1989, and Lymnaea (Radix) thermobaicalica Kruglov et Starobogatov, 1989. The alleged species status of these endemics has been re-assessed by means of an integrative approach combining molecular genetic taxonomy techniques with the traditional methods based on shell and soft body morphology. Phylogenetic reconstructions were made using both mitochondrial (COI) and nuclear (ITS2) DNA markers. We used topotypic samples of both species and specimens sampled from other sites around Lake Baikal. The results demonstrate that the two endemic species are only synonyms of a widespread Holarctic species, Radix auricularia (Linnaeus, 1758), and represent its intraspecific morph (ecotype) adapted to living in thermal springs. A new synonymy is proposed: Thermoradix Kruglov et Starobogatov, 1989 = Radix Montfort, 1810 (syn. n.).

AB - In this study, we re-examine two species of freshwater gastropods of the genus Radix Montfort, 1810 (family Lymnaeidae), endemic to the geothermal springs in the Lake Baikal region in the southern part of eastern Siberia — Lymnaea (Radix) hakusyensis Kruglov et Starobogatov, 1989, and Lymnaea (Radix) thermobaicalica Kruglov et Starobogatov, 1989. The alleged species status of these endemics has been re-assessed by means of an integrative approach combining molecular genetic taxonomy techniques with the traditional methods based on shell and soft body morphology. Phylogenetic reconstructions were made using both mitochondrial (COI) and nuclear (ITS2) DNA markers. We used topotypic samples of both species and specimens sampled from other sites around Lake Baikal. The results demonstrate that the two endemic species are only synonyms of a widespread Holarctic species, Radix auricularia (Linnaeus, 1758), and represent its intraspecific morph (ecotype) adapted to living in thermal springs. A new synonymy is proposed: Thermoradix Kruglov et Starobogatov, 1989 = Radix Montfort, 1810 (syn. n.).

KW - endemic species

KW - hot springs

KW - integrative taxonomy

KW - morphotypes

KW - Radix auricularia

UR - http://www.scopus.com/inward/record.url?scp=85026649538&partnerID=8YFLogxK

U2 - 10.1111/jzs.12174

DO - 10.1111/jzs.12174

M3 - Article

AN - SCOPUS:85026649538

VL - 55

SP - 298

EP - 309

JO - Journal of Zoological Systematics and Evolutionary Research

JF - Journal of Zoological Systematics and Evolutionary Research

SN - 0947-5745

IS - 4

ER -