Volume 31

Volume 31 part 2

Squamophora; new species; Squamophora nierstraszi;
pp. 51 -

I propose to restore the old genus name Squamophora for S. oviformis and the described herein S. nierstraszi sp. nov.. A new emendation of the genus Squamophora is provided, taking into account the main features of the shell, girdle and radula that distinguish it from the closely-related genus Loricella. The new species differs from the type species by the sculpture of the dorsal scales and the shape of the radula teeth.

Восстановление рода Squamophora (Mollusca: Polyplacophora: Loricidae)
Сиренко Б.И. ;
land molluscs; introduction; phenotypes; Western Ukraine; Moscow region; Russia;
pp. 59 -

The phenotypic composition of C. hortensis colonies was studied in Western Ukraine (more than 30 thousand adults from 23 settlements and 5 administrative regions) and the Moscow region of Russia (more than 500 adults and juveniles from two colonies in Moscow and Vidnoe). Most Western Ukrainian colonies were characterized by the absence of pink shells, the high frequencies of unbanded shells (70% or more), as well as the white ground colour in all banded shells. It is supposed that the latter feature makes it possible to reliably identify the colonies formed by the descendants of the primary introduction of C. hortensis into Western Ukraine, which occurred in the 20th century, from later and independent repeated introductions of this species. Unlike Western Ukraine, snails with yellow banded and pink shells were found in both colonies from the Moscow region. Pink banded shells were registered only in Moscow as well as in two colonies from Lviv. In two of the three colonies mentioned, part of the pink unbanded (Moscow) or all pink shells (Lviv) had a dark lip.

Полиморфизм окраски раковины интродуцированной улитки Cepaea hortensis (Gastropoda, Pulmonata, Helicidae) из отдельных регионов Восточной Европы
Гураль-Сверлова Н. В.; Гураль Р. И.;
Soldatov A.A.; Kukhareva T. A.; Morozova V.N.; Richkova V.N.; Andreyeva A.Yu.; Bashmakova A. O.;
extrapallial fluids; cellular volume; anomalies; reactive amitotic division; shistocytes; polymorphic nuclei;
pp. 77 -

In the present work we investigated the influence of three days anoxia on hematological parameters, morphological and functional characteristics of eryhroid cells of alien bivalve Anadara kagoshimensis. Oxygen concentration in seawater was decreased by bubbling with nitrogen gas for 5 h. Temperature was maintained at 20±1oC and photoperiod was 12h day: 12h night. Extrapallial fluids were sampled by a puncture of extrapalial cavity. Three-day exposure to anoxia caused pronounced cellular responses. At the organismic level changes were not observed, as hemoglobin concentration the total number of erythroid cells and mean hemoglobin concentration (МСН) remained at the level of normoxia. We observed an increase of cellular anomalies, i.e. shistocytes and erythroid cells with polymorphic nuclei, and cells undergoing reactive amitotic division, which resulted in formation of binuclear cells. Nuclear volume (Vn) increased for more than 40 % compared to control level. This increase depended on the duration of anoxia. Changes in cellular volume (Vc) possessed a complicated manner. At the end of experimental period (3rd day of anoxia) nucleo-cytoplasmic ratio was 36% lower comparing to normoxia. Exposure to anoxia did not cause mortality of erythroid cells. The number or red blood cell shades observed on slides remained at control level.

Морфометрические характеристики эритроидных гемоцитов у моллюска-вселенца Anadara kagoshimensis (Tokunaga, 1906) в условиях нормоксии и аноксии
Солдатов А.А.; Кухарева Т.А.; Морозова В.Н.; Рычкова В.Н.; Андреева А.Ю.; Башмакова А.О.;
pp. 87 -

Sexual dimorphism is the condition where individuals of different sex in the same species exhibit different characteristics beyond the differences in their sexual organs. In this study, individuals of a viviparid species Filopaludina martensi from the Kwai Yai River in Kanchanaburi Province (Thailand) were examined for eight shell and operculum characteristics. Sexual differences were observed in size of shell and operculum, with females being larger than males. The results indicated that morphometric analyses are useful to detect subtle differences between sexes in this species.

Половой диморфизм и морфометрический анализ Filopaludina martensi martensi (Gastropoda: Viviparidae)
pulmonate molluscs; marine Caenogastropoda;
pp. 93 -

Using the methods of light and electron microscopy, the morphological properties were studied, and the evolutionary changes in the vitreous body of the camera-like eyes of some species of terrestrial gastropod pulmonate molluscs were traced. It was demonstrated that all the considered properties of the vitreous body of molluscs are typical for terrestrial pulmonates. In the course of evolution, as a result of the land development by mollusks, the properties of their vitreous body have hardly changed.

Стекловидное тело камерных глаз наземных брюхоногих моллюсков (Heterobranchia, Stylommatophora)
Шепелева И.П.;
Helix lutescens; Moscow; introduced species;
pp. 105 -

Three small but abundant in specimens isolated colonies of Helix lutescens have been found in the eastern part of Moscow City in the central part of European Russia for the first time. This is an easternmost known colony of the species. Differences from the related and similar small form of H. pomatia are given and discussed.

Helix (H.) lutescens Rossmaessler, 1837 (Gastropoda, Pulmonata, Helicidae), новый интродуцированный вид в малакофауне Москвы
Егоров Р.;