Report on two rare Myostenostomum species (Platyhelminthes: Catenulida) from the Volga River Basin

2017 ◽  
Vol 26 (2) ◽  
pp. 199-204
Author(s):  
R.P. Tokinova ◽  
S.V. Berdnik
Keyword(s):  
South America ◽  
Geographical Distribution ◽  
Biosphere Reserve ◽  
Morphological Characters ◽  
Volga Basin ◽  
Volga River ◽  
Volga River Basin ◽  
Middle Volga Basin ◽  
Middle Volga ◽  
First Time

Two rare catenulid species, Myostenostomum vanderlandi Rogozin, 1992 and M. bulbocaudatum Luther, 1960, were found in reservoirs of the Volga-Kama Biosphere Reserve (Middle Volga Basin, Russia) during a survey of microturbellaria in 2013. Both the species were recorded for the first time in the fauna of the Volga Basin, while M. vanderlandi, previously known only from water bodies of South America, was first found in the Holarctic. The morphological characters and geographical distribution of the species are discussed.

scholarly journals Distribution and species composition of zooplankton (rotifers and crustaceans) in the Basin of the Middle Volga River, Russia

2021 ◽  
Vol 9 ◽  
Author(s):  
Oksana Mukhortova ◽  
Stepan Senator ◽  
Elena Unkovskaya
Keyword(s):  
Species Composition ◽  
River Basin ◽  
Native Species ◽  
Biosphere Reserve ◽  
Zooplankton Species ◽  
Kuibyshev Reservoir ◽  
Volga River ◽  
Volga River Basin ◽  
Samara Oblast ◽  
Middle Volga

The presented dataset contains information on the distribution and species composition of zooplankton (rotifers and crustaceans) registered in the Basin of the Middle Volga River, Russia. The studies have been performed in the Kuibyshev Reservoir (Samara Oblast and the Republic of Tatarstan), the Saratov Reservoir (Samara Oblast), in several lakes (Raifskoe, Gniloe, Krugloe and Lenevo) in the Volzhsko-Kamsky State Biosphere Reserve (Republic of Tatarstan) and in Lake Aslikul, one of the largest lakes of the Middle Volga River Basin, located in the Asly-Kul Natural Park (Republic of Bashkortostan). The hydrobiological data were obtained and published from 1957 to 2020. In total, the dataset includes 5141 records of 111 zooplankton species (including 17 subspecies), belonging to 45 genera. These are mainly native species - 98.5%, while the naturalised, including invasive species, accounts for less than 1.5%. A total of 5141 records have been published on the taxonomic diversity and occurrence of zooplankton (rotifers and crustaceans) in the Middle Volga River Basin. Each record includes information about the place and date of finding the specimen, its taxonomy, occurrence and abundance and the collector. If the information about the find has been published, a link to the corresponding reference is provided. The presented dataset supplements the data on the distribution of zooplankton species in the European part of Russia. Data on zooplankton in the Middle Volga River Basin are published for the first time.

scholarly journals An Overview of the Helminths of Moor Frog Rana arvalis Nilsson, 1842 (Amphibia: Anura) in the Volga Basin

Diversity ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 61
Author(s):  
Igor V. Chikhlyaev ◽  
Alexander B. Ruchin
Keyword(s):  
Systematic Position ◽  
Helminth Fauna ◽  
Helminth Species ◽  
Volga Basin ◽  
Rana Arvalis ◽  
Amphibian Species ◽  
Volga River ◽  
Spirometra Erinacei ◽  
First Time ◽  
Moor Frog

This is the first review of the helminth fauna of the moor frog Rana arvalis Nilsson, 1842 from the Volga river basin (Russia). The article summarizes the authors’ and literature data on the helminthic fauna of this species. The method of complete helminthological dissection was used. Thirthy-eight helminth species were recorded from three classes: Cestoda (1), Trematoda (28), and Chromadorea (9). Nine helminth species are new to the moor frog in Russia: trematodes Gorgodera varsoviensis Sinitzin, 1905, Strigea falconis Szidat, 1928, larvae, Neodiplostomum spathoides Dubois, 1937, larvae, Tylodelphys excavata (Rudolphi, 1803), larvae, Pharyngostomum cordatum (Diesing, 1850), larvae, Astiotrema monticelli Stossich, 1904, larvae and Encyclometra colubrimurorum (Rudolphi, 1819), larvae, nematodes Strongyloides spiralis Grabda-Kazubska, 1978 and Icosiella neglecta (Diesing, 1851). The cestode Spirometra erinacei (Rudolphi, 1918), larvae were observed of this amphibian species in the Volga basin for the first time. The nematodes Rhabdias bufonis, Oswaldocruzia filiformis, Cosmocerca ornata and the trematode Haplometra cylindracea form the core of the helminth fauna of the moor frog. Information on species of helminths includes systematic position, localization, areas of detection, type and scheme of life cycle, geographical distribution, and degree of specificity to host amphibians.

A revision of Rhaponticoides (Asteraceae, Cardueae–Centaureinae) from Iran

Phytotaxa ◽  
2015 ◽  
Vol 213 (2) ◽  
pp. 87 ◽  
Author(s):  
Kazem Negaresh ◽  
SAYED MOHAMMAD REZA KHOSHROO ◽  
ROYA KARAMIAN ◽  
MOHAMMAD REZA JOHARCHI
Keyword(s):  
Geographical Distribution ◽  
Morphological Characters ◽  
Identification Key ◽  
Full Description ◽  
New Combinations ◽  
Taxonomic Review ◽  
Herbarium Collections ◽  
First Time

A taxonomic review of Rhaponticoides in Iran is based on morphological characters of the specimens from the authors’ expeditions and other herbarium collections. Rhaponticoides lachnopus, R. schmidii, R. sect. Iranicae and R. sect. Ruthenicae are proposed as new combinations. Full description for the genus Rhaponticoides and R. sect. Iranicae and R. sect. Ruthenicae are presented for the first time here. Three names, R. lachnopus, R. ruthenica and its synonym, are typified. A synopsis with recognized sections and species, relevant synonyms, type citations, lists of specimens examined and an identification key are provided for the genus Rhaponticoides in Iran. In addition, some notes about ecology and habitat of Rhaponticoides especially in Iran are given. Finally, the geographical distribution of all the 4 species recognized in Iran is presented and mapped.

scholarly journals THE FIRST DATA ON THE MEIOBENTHOS OF LAKE NERO

2020 ◽  
pp. 61-72
Author(s):  
V. Gusakov
Keyword(s):  
Species Richness ◽  
Aquatic Organisms ◽  
Quantitative Structure ◽  
Community Members ◽  
Volga River ◽  
Volga River Basin ◽  
Qualitative And Quantitative ◽  
First Results ◽  
High Species Richness ◽  
First Time

The paper provides the first results of a study of the qualitative and quantitative structure of the community of bottom meiofauna (meiobenthos) in shallow, hypereutrophic Lake Nero (Volga River basin, Yaroslavl region, Russia). In the samples, collected in early September 2017, 106 representatives from 16 systematic groups of aquatic organisms were found. About half of them had not been previously recorded in the lake's fauna. The species composition of Gastrotricha, Nematoda, Tardigrada, Acari, Harpacticoida, and Ostracoda was analyzed in the water body for the first time. It is established that at the end of the vegetation season, the lake's meiobenthos characterizes by relatively high species richness, diversity, and quantitative parameters. The circle of the main (dominant) community members in the studied period was outlined.

The parasitoid complex (Hymenoptera, Eulophidae) of leafminer flies (Diptera, Agromyzidae) in the middle Volga Basin

2013 ◽  
Vol 93 (7) ◽  
pp. 865-873 ◽  
Author(s):  
I. S. Strakhova ◽  
Z. A. Yefremova ◽  
M. von Tschirnhaus ◽  
E. N. Yegorenkova
Keyword(s):  
Volga Basin ◽  
Parasitoid Complex ◽  
Middle Volga Basin ◽  
Middle Volga

scholarly journals Ontogenetic structure and types of cenopopulation of Hedysarum grandiflorum Pall. in the Middle Volga basin

2019 ◽  
Vol 64 (3) ◽  
pp. 302-310
Author(s):  
V. N. Ilyina
Keyword(s):  
Growth Conditions ◽  
Volga Basin ◽  
Limiting Factors ◽  
Life Strategy ◽  
Aging Index ◽  
Current State ◽  
Main Indicator ◽  
Middle Volga Basin ◽  
Ontogenetic Structure ◽  
Middle Volga

. The need to study the current state of cenotic populations of rare plant species in nature is not in doubt for the conservation of floristic and phytocenotic diversity at the regional and world levels. The purpose of our study is to study the current state of the cenotic populations of Rare in the Middle Volga basin Hedysarum grandiflorum Pall. To characterize the ontogenetic structure of the cenopopulations, generally accepted demographic indicators were used: the recovery index (the ratio of growth to the generative fraction is calculated), the replacement index (the ratio of growth and the sum of generative and post-regenerative fractions), and the aging index (post-generative to the adult part of the cenotic populations). The population estimation was carried out by the criterion “delta-omega”.A relatively narrow range of ecological and phytocoenotic growth conditions is characteristic of the species, for the most part a patient type of life strategy. Among the limiting factors for the development of populations of environmental factors are their location at the border of the area, uncontrolled grazing in areas, excessive recreation of territories and steppe fires (natural origin and pala) in phytocenoses with the participation of a penny, career development of limestone and Cretaceous slopes, and construction debris, the appearance of dirt roads and the construction of various objects in the points of growth of the model species.The main ways of ontogenesis of the species are identified – normal, accelerated and delayed, breaks in the development of individuals, their rejuvenation and the manifestation of quasisenity were noted. The majority of H. grandiflorum develop at a normal and accelerated rate. The main indicator for determining the current state of populations and their loci is the ontogenetic structure. As an example, information on the ontogenetic composition of some cenopopulations of H. grandiflorum at the Chubovskaya Krasnaya Gorka (High Samara Zavolzhye, Russia) is given. Populations are characterized by the predominance of generative individuals. Of the registered cenopopulations, 11 is characterized as mature, 9 – transitional, 2 – ripening, 1 – young. Aggregation is characteristic of the spatial structure of H. grandiflorum.

scholarly journals Initial stages of two Neolithisation models in the Lower Volga basin

2016 ◽  
Vol 43 ◽  
pp. 161-166
Author(s):  
Alexander Vybornov
Keyword(s):  
Eastern Europe ◽  
River Basin ◽  
Volga Basin ◽  
Volga River ◽  
Production Economy ◽  
Volga River Basin ◽  
Lower Volga

In this paper, two groups of ancient sites located in the Lower Volga River basin are analysed. The first group is linked to the emergence of the oldest pottery in this region, which is one of the most ancient in Europe. The presence of this feature of the ‘Neolithic package’ can be dated to the middle of the 7th millenium BC. A production economy is a particular feature of the second group of sites, which can be dated to the end of the 6th millenium BC. This is one of the earliest pieces of evidence of the existence of domesticated species in Eastern Europe. These two groups of sites show the initial stages of two Neolithisation models in the Lower Volga basin.

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