Euglesa nordenskioldi (Clessin, 1876)

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), Zoological Journal of the Linnean Society 201 (2), pp. 305-338 : 329

publication ID

https://doi.org/ 10.1093/zoolinnean/zlad139

publication LSID

lsid:zoobank.org:pub:DC94015-12D0-42CB-B21E-F7C950E94EFDEuglesa

DOI

https://doi.org/10.5281/zenodo.13311721

persistent identifier

https://treatment.plazi.org/id/03D887B7-1822-FFEF-3D9E-F831A3871F74

treatment provided by

Plazi

scientific name

Euglesa nordenskioldi
status

 

Euglesa nordenskioldi View in CoL (Clessin in Westerlund, 1876)

( Fig. 9H View Figure 9 )

Pisidium nordenskioldi Westerlund, 1876: 68–69 View in CoL , pl., fig. 20.

Type series: Not traced, probably lost.

Type locality: Russia, Krasnoyarsk Territory (northern part) and Tyumen Region. The syntypes were collected in several localities ["Jenissei, vid Dudino, (lat. 69°15 ʹ), Surgutskoj (lat. 62°50 ʹ), Worogowa Selo (lat. 69°50 ʹ)"; Westerlund 1877: 69].

Material examined: Vashutkiny lakes, VIII.2016, Aksenova, Aksenov, Bespaliy, Sokolova & Shevchenko leg., 94 specimens (lot nos RMBH MSph 184, 263), Vaigach Island , VIII.2010, Aksenova & Bespalaya, leg., 68 specimens; Yugorsky Peninsula, VI.2015, Spitsyn leg., four specimens (lot no. RMBH MSph 86-3) .

Description: The shell is medium sized (mean length ± SE 2.9 ± 0.6 mm), round-oval in shape ( Fig. 9H View Figure 9 ), distinctly and regularly striated. The beaks are rounded and prominent, located in the middle of the valves ( Fig. 9H View Figure 9 ). The cardinal tooth of the right valve is slightly curved, with a weaker split at the posterior end. The inner cardinal tooth of the left valve is straight. The outer cardinal tooth of the left valve is thin, slightly curved ( Fig. 10E View Figure 10 ). The lateral teeth are long.

Distribution: Northern European Russia and Siberia.

Comment: The 16S and 28S rRNA sequences of this species have no analogues in GenBank and are more closely related to the E. henslowana group ( Fig. 2 View Figure 2 ). We analysed the original descriptions and type specimens of some nominal species of this group from close localities (Supporting Information, Fig. S1A–D View Figure 1 ), that is, Euglesa nordenskioldi (Clessin in Westerlund, 1877), Euglesa ostroumovi Pirogov & Starobogatov, 1974 , Euglesa polonica Anistratenko & Starobogatov, 1990 , Euglesa sibirica (Clessin in Westerlund, 1877), and Euglesa suecica (Clessin in Westerlund, 1873). The original morphological description of Pisidium nordenskioldi Clessin published in Westerlund (1876) corresponds well to the morphological features of specimens from our samples. In addition, Korniushin (1996) noted the presence of E. nordenskioldi in the lakes of the Bolshezemelskaya Tundra. According to morphological features, this species can be classified as E. nordenskioldi . At the same time, the type specimens of E. polonica , E. ostroumovi , and E. suecica , studied by us, can be distinguished from E. nordenskioldi by having narrow and prominent beaks, offset to the posterior edge of the valves and with oblique folds ( Fig. 9 View Figure 9 ; Supporting Information, Fig. S2A–D View Figure 2 ). Therefore, we do not have sufficient grounds to synonymize the listed species with E. nordenskioldi .

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Sphaeriida

Family

Sphaeriidae

Genus

Euglesa

Loc

Euglesa nordenskioldi

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
2024
Loc

Pisidium nordenskioldi

Westerlund 1876: 68 - 69
1876
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