TY - JOUR

T1 - One Beringian genus less

T2 - A re-assesment of Pacifimyxas Kruglov & Starobogatov, 1985 (Mollusca: Gastropoda: Lymnaeidae) questions the current estimates of Beringian biodiversity

AU - Vinarski, Maxim V.

AU - Aksenova, Olga V.

AU - Bespalaya, Yulia V.

AU - Kondakov, Alexander V.

AU - Tomilova, Alena A.

AU - Khrebtova, Irina S.

AU - Yu. Gofarov, Mikhail

AU - Bolotov, Ivan N.

N1 - Funding Information: The authors thank the Russian Scientific Fund (project No. 19‐04‐00066) for funding field samplings and molecular studies of mollusks of Beringia as well as the writing of this article. The work with museum collections and morphological studies were partially funded by the Russian Foundation of Basic Research under projects (No. 18‐44‐292001 and 19‐04‐00270), and by the Ministry of Science and Higher Education of the Russian Federation (project no. AAAA‐A17‐117033010132‐2). The fieldwork in Kamchatka was made with support from President of Russia Grant Council (project No. MК‐1720.2019.4). The authors are thankful to Yu.E. Dekina and the late E.P. Dekin (Elizovo, Kamchatka), N.P. Sychova (Esso, Kamchatka), N.V. Solov'ev (Kronotsky Nature Reserve, Kamchatka and Nature Park Volcanoes of Kamchatka), V.A. Parensky, V.N. Koryagin and other staff of the “Raduga” biological station (National Scientific Center of Marine Biology, the Far Eastern Branch of the Russian Academy of Sciences), E.V. Basov (Anadyr, Chukotka), I.V. Vikhrev, S.E. Sokolova, and A.R. Shevchenko (RMBH) for their help during field works and collecting of snail samples. We thank Pavel Kijashko (ZIN) for the photograph of the lectotype of Limnaeus kamtschaticus . Marco T. Neiber, Benedikt Wiggering, and an anonymous referee are acknowledged for their constructive remarks on earlier versions of this paper. We thank the Associate Editor, Barna Páll‐Gergely, for his useful suggestions. Publisher Copyright: © 2020 Blackwell Verlag GmbH Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - The taxonomic position of three nominal species of lymnaeid snails placed by Kruglov & Starobogatov (1993) into the subgenus Lymnaea (Pacifimyxas) Kruglov & Starobogatov, 1985, has been re-assessed based on a molecular genetic study of topotypic specimens and an examination of the type series and other materials available. It has been shown that the two species, Lymnaea (Pacifimyxas) magadanensis Kruglov & Starobogatov, 1985 and Lymnaea (Pacifimyxas) streletzkajae Kruglov & Starobogatov, 1985, are identical with the species Kamtschaticana kamtschatica (Middendorff, 1850) and must be treated as its junior synonyms. Hence, Pacifimyxas becomes a junior synonym of Kamtschaticana Kruglov & Starobogatov, 1984. The taxonomic identity of the third species of Pacifimyxas, Lymnaea (Pacifimyxas) perpolita, remains obscure, and this species is considered here as taxon inquirendum. Two other nominal species, Lymnaea aberrans (Westerlund, 1897) and Lymnaea middendorffi (W. Dybowski, 1904), have been synonymized with K. kamtschatica based on morphological and geographical evidence. The lectotype of Limnaea peregra var. middendorffi is designated. The actual level of species richness in the Beringian freshwater malacofauna may be 20–25% lower than it was determined on the basis of the traditional system. Some implications of this outcome for the biogeography of the Beringian freshwater fauna are discussed.

AB - The taxonomic position of three nominal species of lymnaeid snails placed by Kruglov & Starobogatov (1993) into the subgenus Lymnaea (Pacifimyxas) Kruglov & Starobogatov, 1985, has been re-assessed based on a molecular genetic study of topotypic specimens and an examination of the type series and other materials available. It has been shown that the two species, Lymnaea (Pacifimyxas) magadanensis Kruglov & Starobogatov, 1985 and Lymnaea (Pacifimyxas) streletzkajae Kruglov & Starobogatov, 1985, are identical with the species Kamtschaticana kamtschatica (Middendorff, 1850) and must be treated as its junior synonyms. Hence, Pacifimyxas becomes a junior synonym of Kamtschaticana Kruglov & Starobogatov, 1984. The taxonomic identity of the third species of Pacifimyxas, Lymnaea (Pacifimyxas) perpolita, remains obscure, and this species is considered here as taxon inquirendum. Two other nominal species, Lymnaea aberrans (Westerlund, 1897) and Lymnaea middendorffi (W. Dybowski, 1904), have been synonymized with K. kamtschatica based on morphological and geographical evidence. The lectotype of Limnaea peregra var. middendorffi is designated. The actual level of species richness in the Beringian freshwater malacofauna may be 20–25% lower than it was determined on the basis of the traditional system. Some implications of this outcome for the biogeography of the Beringian freshwater fauna are discussed.

KW - Beringia

KW - biogeography

KW - freshwater mollusks

KW - Lymnaeidae

KW - molecular taxonomy

KW - Pacifimyxas

UR - http://www.scopus.com/inward/record.url?scp=85090121948&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85090121948

VL - 59

SP - 44

EP - 59

JO - Journal of Zoological Systematics and Evolutionary Research

JF - Journal of Zoological Systematics and Evolutionary Research

SN - 0947-5745

IS - 1

ER -