Editorial

347

Sabirov R.M., Golubev A.I., Malutina L.V., Bespyatikh A.V. Scientific and pedagogical heritage of Professor V.L. Wagin at the Kazan University

348

Khlebovich V.V. Memoirs of Vladimir Lvovich Wagin

361

Nigmatullin Ch.M. The main results of parasitological investigations of Vladimir Lvovich Wagin (1907–1984)

367

Burukovsky R.N. On Coelenterata: Validation and des­cription of the superphylum Coelenterata (Leuckart, 1847)

382

Zeleev R.M. Building parametric systems for Ascotoracida and Myzostomida taхa: Current problems and ways to solve them

395

Golubev A.I., Malutina L.V., Salnikova M.M., Zabotin Ya.I. Cellular plasticity of nervous system of helminthes at the ultrastructural level

409

Zabotin Ya.I., Golubev A.I. On the origin of the nervous system based on studying sensillae in acoel turbellarians (Acoela)

421

Sabirov R.M., Novikov A.A., Golikov A.V. Structure of male reproductive system in Spirula (Cephalopoda: Spirula spirula)

433

Sudnik S.A. Evolutionary aspects of reproductive strategies in shrimps

443

Porfiriev A.G. Morphology and redes­cription of endemic Baikal planarians of the genus Archicotylus Korotneff, 1912

455

Gordeev I.I., Sokolov S.G., Orlov A.M. Macroparasites of blue hake Antimora rostrata and Pacific flatnose Antimora microlepis (Gadiformes, Moridae): Current state of exploration

468

Pinchukov M.A. Estimation of age in females of the red king crab Paralithodes camtschaticus (Decapoda, Lithodidae) from the Barents Sea based on their size composition

480

Kwong L.E., Pakhomov E.A. Assessment of active vertical carbon transport: New methodology

492

Olenin S.N. The study of biological invasions in marine ecosystems during the period of shifts in research paradigms

510

Uvaeva E.I., Shimkovich E.D. Bioindication significance of population characteristics of viviparids (Mollusca, Gastropoda, Viviparidae) in water bodies of Central Polesia, Ukraine

521

Karmazina I.O., Shulaev N.V. Outbreaks of acridoid grasshoppers in the Republic of Tatarstan (Russia)

531