Published November 4, 2023 | Version v1
Taxonomic treatment Open

Euglesa lindholmi Bespalaya & Vinarski & Aksenova & Babushkin & Gofarov & Kondakov & Konopleva & Kropotin & Mabrouki & Ovchankova & Palatov & Sokolova & Shevchenko & Travina & Taybi & Soboleva & Zubrii & Bolotov 2024, comb. nov.

  • 1. N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Nikolsky Avenue 20, 163020 Arkhangelsk, Russian Federation & Laboratory of Macroecology & Biogeography of Invertebrates, Saint Petersburg State University, Universitetskaya Emb. 7 - 9, 199034 Saint Petersburg, Russian Federation
  • 2. Laboratory of Macroecology & Biogeography of Invertebrates, Saint Petersburg State University, Universitetskaya Emb. 7 - 9, 199034 Saint Petersburg, Russian Federation
  • 3. N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Nikolsky Avenue 20, 163020 Arkhangelsk, Russian Federation
  • 4. Laboratory of Macroecology & Biogeography of Invertebrates, Saint Petersburg State University, Universitetskaya Emb. 7 - 9, 199034 Saint Petersburg, Russian Federation & Surgut State University, Lenina Ave., 1, 628403 Surgut, Russian Federation
  • 5. Biotechnology, Conservation and Valorisation of Natural Resources Laboratory, Faculty of Sciences Dhar El Mehraz, Sidi Mohamed Ben Abdellah University, Fez. B. P. 1796, 30003 Fès-Atlas, Morocco
  • 6. Laboratory of Macroecology & Biogeography of Invertebrates, Saint Petersburg State University, Universitetskaya Emb. 7 - 9, 199034 Saint Petersburg, Russian Federation & Zoological Institute, Russian Academy of Sciences, Universitetskaya Emb. 1, 199034 Saint Petersburg, Russian Federation
  • 7. Laboratory of Macroecology & Biogeography of Invertebrates, Saint Petersburg State University, Universitetskaya Emb. 7 - 9, 199034 Saint Petersburg, Russian Federation & A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Leninsky Prt., 33, 119071 Moscow, Russian Federation
  • 8. Mohammed Premier University, Multidisciplinary Faculty of Nador, Applied Biology and Biotechnology Research Team, B. P 300, 62700 Selouane, Morocco

Description

Euglesa lindholmi (Starobogatov & Streletzkaja, 1967) comb. nov.

(Fig. 9C)

Odhneripisidium lindholmi Starobogatov & Streletzkaja, 1967: 256, fig. 69.

Type series: The holotype (a separate valve) and three separate valves of paratypes are deposited in ZIN, nos 1 and 2 in the systematic catalogue.

Type locality: Russia, Republic of Yakutia (Sakha), Quaternary deposits on the left bank of the Allaikha River (Indigirka River Basin).

Material examined: North Asia: Gydan Peninsula, VII.2017, Sokolova & Shevchenko leg., Republic of Yakutia, Yana River Basin, VIII.2019, Zubrii leg., Republic of Buryatia, near Vitim Nature Reserve, Dannoe Lake, VIII.2020, Babushkin leg., in total 29 specimens (lot nos RMBH MSph-737, MSph-370, MSph-569/1, MSph-569/2, MSph-572/1).

Description: The shell is small (mean shell length ± SD 3.15 ± 0.03 mm), round-oval in shape (Fig. 9C). The beaks are rounded and prominent, and somewhat offset to the posterior edge of the valves (Fig. 9C). The cardinal tooth of the right valve is thickened on the posterior end. The inner cardinal tooth of the left valve is straight. The outer cardinal tooth of the left valve is thickened, shorter than inner cardinal tooth (Fig. 10C).

Comments: The 16S and 28S rRNA sequences of this species have no analogues in GenBank and are more closely related to the E. parvula group (Fig. 2). Previously, several species described from the basin of the Indigirka and Kolyma rivers and also from the Kamchatka Peninsula were assigned to the genus Hiberneuglesa Starobogatov in Dolgin, 1983 (Korniushin 1996, Vinarski and Kantor 2016) with the exception of Euglesa subconventa (Starobogatov & Streletzakaja, 1967), Pisidium indigircence Starobogatov & Streletzkaja, 1967, and Euglesa cor (Starobogatov & Streletzkaja, 1967). Currently, this group is treated as the species E. parvula (Graf and Cummings 2023; MolluscaBase 2023) with the junior synonyms: Euglesa anjuica Starobogatov & Korniushin, 1989, Euglesa kolhymensis (Starobogatov & Streletzkaja, 1967), Euglesa kuiperi (Starobogatov & Streletzkaja, 1967), Euglesa lindholmi (Starobogatov & Streletzkaja, 1967), and several species from other regions. Euglesa cor is currently considered as a junior synonym of Euglesa obtusalis (Lamarck, 1818) (Graf and Cummings 2023; MolluscaBase 2023). These species are still known only from their type specimens (represented by dried shells). We have studied the type specimens and the original descriptions of all of these species (Supporting Information, Fig. S1K, N–Q). According to morphological features of these type series, and morphological and molecular-genetic analysis of the examined material (see above), we believe that the listed nominal species should be treated as E. lindholmi. The taxonomic status of E. anjuica, E. cor, E. kolhymensis, E. kuiperi, E. subconventa, and Pisidium indigircence needs to be clarified.

Distribution: Siberia.

Notes

Published as part of Bespalaya, Yulia V., Vinarski, Maxim V., Aksenova, Olga V., Babushkin, Evgeniy S., Gofarov, Mikhail Yu., Kondakov, Alexander V., Konopleva, Ekaterina S., Kropotin, Alexander V., Mabrouki, Youness, Ovchankova, Nadezda B., Palatov, Dmitry M., Sokolova, Svetlana E., Shevchenko, Alexander R., Travina, Oksana V., Taybi, Abdelkhaleq F., Soboleva, Alena A., Zubrii, Natalia A. & Bolotov, Ivan N., 2024, Phylogeny, taxonomy, and biogeography of the Sphaeriinae (Bivalvia: Sphaeriidae), pp. 305-338 in Zoological Journal of the Linnean Society 201 (2) on pages 327-328, DOI: 10.1093/zoolinnean/zlad139, http://zenodo.org/record/13220074

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References

  • Korniushin AV. Bivalve Molluscs of the Superfamily Pisidioidea in the Palaearctic Region: Fauna, Systematics, Phylogeny. Kiev: Schmalhausen Institute of Zoology Press, 1996 [in Russian].
  • Graf DL, Cummings KS. The Freshwater Mussels (Unionoida) of the World (and Other Less Consequential Bivalves), updated 14 Febrary 2023, 2023. MUSSEL Project Web Site. Available at: http: // www. musselproject. net /