1. Finding of Oriental River Prawn Macrobrachium nipponense (De Haan, 1849) in the Lower Terek River (Caspian Sea Basin)

   • D. F. Afanasyev
   • L. A. Zhivoglyadova
   • A. V. Mirzoyan

   OriginalPaper 03 October 2020 Pages: 191 - 197

   

2. Features of Biocenotic Relations of Anadara kagoshimensis (Bivalvia, Arcidae) in the Kazachya Bay of the Black Sea

   • I. P. Bondarev

   OriginalPaper 03 October 2020 Pages: 198 - 207

   

3. Anthropogenic Invasion of Micromycetes to Undisturbed Ecosystems of the Larsemann Hills Oasis (East Antarctica)

   • D. Yu. Vlasov
   • I. Yu. Kirtsideli
   • E. P. Barantsevich

   OriginalPaper 03 October 2020 Pages: 208 - 215

   

4. Great White Egret Casmerodius albus in Novgorod Region in 2016–2018

   • N. V. Zueva
   • V. Yu. Arkhipov
   • A. V. Kotkin

   OriginalPaper 03 October 2020 Pages: 216 - 219

   

5. Naturalization of Striped Seabream Lithognathus mormyrus (Sparidae) in the Black Sea

   • E. P. Karpova

   OriginalPaper 03 October 2020 Pages: 220 - 224

   

6. The Settlement of Erigeron annuus (L.) Pers. and Analysis of the Reasons for Reproductive Success

   • E. I. Kudryavtseva
   • Yu. Kir. Vinogradova
   • N. M. Reshetnikova

   OriginalPaper 03 October 2020 Pages: 225 - 237

   

7. Environmental Factors Affecting the Conchological Variability of the Common River Snail Viviparus viviparus (L., 1758) (Mollusca: Gastropoda) in the Novosibirsk Reservoir, Russia

   • D. V. Kuzmenkin
   • L. V. Yanygina

   OriginalPaper 03 October 2020 Pages: 238 - 245

   

8. Change of Low-Molecular-Weight Metabolome of Alien Species Potamogeton pectinatus L. in Lake Ladoga in Comparison with Population of Native Range

   • E. A. Kurashov
   • J. V. Krylova
   • A. G. Rusanov

   OriginalPaper 03 October 2020 Pages: 246 - 264

   

9. Attagenus gobicola Frivaldszky, 1892 and Anthrenus picturatus Solskij, 1876 (Coleoptera: Dermestidae)—The New Invasive Species of Carpet Beetles in the Fauna of Belarus

   • A. M. Ostrovsky

   OriginalPaper 03 October 2020 Pages: 265 - 267

   

10. Thladiantha dubia Bunge in Bryansk Region: Distribution, Ecology, and Biochemical Characteristics

    • N. N. Panasenko
    • L. N. Anishchenko

    OriginalPaper 03 October 2020 Pages: 268 - 276

    

11. Brown Algae of the Genus Cystoseira in the Sea of Azov: Settling or Expansion of the Range?

    • O. V. Stepanyan

    OriginalPaper 03 October 2020 Pages: 277 - 282

    

12. Parasites of the So-Iuy Mullet Planiliza haematocheila (Temminck & Schlegel, 1845) (Actinopterygii: Mugilidae) in the Native Range and Places of Introduction

    • V. M. Yurakhno

    OriginalPaper 03 October 2020 Pages: 283 - 292

13. The Occurrence of Amphiglena mediterranea (Leydig, 1851) (Annelida: Sabellidae) at the Romanian Coast of the Black Sea: A Case on an Unsuccessful Invasion?

    • V. Surugiu
    • María Capa

    OriginalPaper 03 October 2020 Pages: 293 - 299