Thalassiosira azovica sp. nov. and some other Thalassiosira species (Bacillariophyta) from Holocene sediments of the Sea of Azov

2017 ◽  
Vol 51 ◽  
pp. 37-56 ◽  
Author(s):  
R. M. Gogorev ◽  
G. V. Kovaleva
Keyword(s):  
New Species ◽  
Sea Of Azov ◽  
The Holocene ◽  
The Sea Of Azov ◽  
Holocene Sediments

New data on morphology of 10 Thalassiosira species from the Holocene deposits of the Sea of Azov are presented. The new species, Thalassiosira azovica Gogorev et Kovaleva, sp. nov., is described. It is very similar to T. latimarginata and T. trifulta and differs mainly by presence of scattered strutted processes on the valve face. Two species, T. allenii and T. mediterranea, are first recorded for the Sea of Azov and Russia. Furthermore, they are first found in fossils as well as T. incerta and T. proschkinae.

Actinocyclus pseudopodolicus sp. nov. and infraspecific complex of A. octonarius (Bacillariophyta) from Holocene sediments of the Sea of Azov

2018 ◽  
Vol 52 (1) ◽  
pp. 33-61
Author(s):  
R. M. Gogorev ◽  
G. V. Kovaleva ◽  
A. V. Nazarenko
Keyword(s):  
New Species ◽  
Sea Of Azov ◽  
The Holocene ◽  
The Sea Of Azov ◽  
Holocene Sediments ◽  
Infraspecific Taxa

New data on morphology of 7 infraspecific taxa of Actinocyclus octonarius, frequently found in the Holocene deposits of the Sea of Azov, are presented. New species A. pseudopodolicus Kovaleva et Gogorev, sp. nov., and variety A. octonarius var. tonsura Kovaleva et Gogorev, var. nov. are described. They are similar to varieties of A. octonarius and some other Actinocyclus species but differ from them in presence of curved fascicules of areolae in A. pseudopodolicus and hyaline ring on valves of A. octonarius var. tonsura.

scholarly journals A New Species of Mites of the Genus Bdella (Acari, Bdellidae) from Ukraine

2013 ◽  
Vol 47 (2) ◽  
pp. 52-56
Author(s):  
S. I. Maslov ◽  
A.A. Khaustov
Keyword(s):  
New Species ◽  
Black Sea ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
A New Species

Bdella kuznetsovi Maslov et Khaustov, sp. n. is described from storm detritus of Black Sea and Sivash Gulf of the Sea of Azov, Ukraine

scholarly journals New species of unilocular calcareous foraminifera from the Holocene of the southwest Pacific Ocean

1995 ◽  
Vol 14 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Fred E. Clark
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Pumpkin Seed ◽  
The Holocene ◽  
Southwest Pacific ◽  
Holocene Sediments ◽  
Strong Resemblance

Abstract. Four new species of unilocular calcareous foraminifera are described from Holocene sediments of the southwest Pacific Ocean. Vasicostella cranimorpha sp. nov. is distinguished by a lenticular tubule that pierces each margin of the peripheral carina. Globofissurella pattersoni sp. nov. is characterized by a large, produced circular apertural area ornamented in part by costae continuing from the chamber surface. Palliolatella peponisema sp. nov. bears a strong resemblance to a pumpkin seed, and has quite variable development of its central keel. Parafissurina thryptica sp. nov. is distinctly teardrop-shaped, with its greatest diameter near the base, and a mildly acute apertural end.

New Results on the History of the Sea of Azov in the Holocene

2019 ◽  
Vol 489 (1) ◽  
pp. 1339-1344
Author(s):  
G. G. Matishov ◽  
V. V. Polshin
Keyword(s):  
Sea Of Azov ◽  
The Holocene ◽  
The Sea Of Azov ◽  
History Of

Cyclicity of Climate in the Sea of Azov Region: The Holocene and the Current Period (19th to 21st Centuries)

2021 ◽  
Vol 498 (1) ◽  
pp. 436-440
Author(s):  
G. G. Matishov ◽  
L. V. Dashkevich ◽  
E. E. Kirillova
Keyword(s):  
Sea Of Azov ◽  
The Holocene ◽  
The Sea Of Azov ◽  
Current Period ◽  
Azov Region

A new species of the genus Thinophilus (Diptera: Dolichopodidae) from Ukraine and Kazakhstan

2017 ◽  
Vol 26 (2) ◽  
pp. 325-328
Author(s):  
O.P. Negrobov ◽  
O.O. Maslova ◽  
O.V. Selivanova
Keyword(s):  
New Species ◽  
Dorsal Seta ◽  
Fore Tibia ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Northern Kazakhstan ◽  
A New Species

Thinophilus sinclairi sp. nov. is described from the coast of the Sea of Azov, Ukraine, and from northern Kazakhstan. The new species is similar to T. spinitarsis Becker but differs from it in the structure of the hypopygium, apex of fore tibia without long black dorsal seta, and segments 2–4 of fore tarsi with long posterodorsal black setae.

scholarly journals Cairaeanthus gen. n. (Cestoda, Rhinebothriidea), with the Description of Two New Species from Dasyatis pastinaca in the Black Sea and the Sea of Azov

2012 ◽  
Vol 46 (4) ◽  
pp. e-1-e-18 ◽  
Author(s):  
V. Kornyushin ◽  
T. Polyakova
Keyword(s):  
New Species ◽  
Black Sea ◽  
New Genus ◽  
Morphological Characters ◽  
The Black Sea ◽  
Sea Of Azov ◽  
Type Specimens ◽  
The Sea Of Azov ◽  
Apical Sucker ◽  
Two New Species

Cairaeanthusgen. n. (Cestoda, Rhinebothriidea), with the Description of Two New Species fromDasyatis pastinacain the Black Sea and the Sea of AzovTwo new species were identified among cestodes collected fromDasyatis pastinaca(Linnaeus, 1758) in the Black Sea and the Sea of Azov. Their morphology corresponds in the most characters to the descriptions ofPhyllobothrium lactucavan Beneden, 1850 andP. gracilisWedl, 1855 by L. Borcea (Borcea, 1934) and T. P. Pogorel'tseva (Pogorel'tseva, 1960) from the same host and seas. However, some morphological characters of these cestodes (namely, the marginal loculi on the pedicellate bothridia, cephalic peduncle, absence of the apical sucker and post-poral testes, genital pore opening marginally, close to posterior end of proglottid) correspond to diagnosis of Rhinebothriidea. Since the species from the Black Sea and the Sea of Azov did not fit diagnoses of any known genera currently belonging to Rhinebothriidea, the new genus,CairaeanthusKornyushin et Polyakova, gen. n., with two species,C. ruhnkeiKornyushin et Polyakova, sp. n. andC. healyaeKornyushin et Polyakova, sp. n., is established.Cairaeanthusgen. n. differs fromAnthocephalumLinton, 1890 in absence of apical sucker, posteriorly bifid bothridia and vitelline fields interrupted by the ovary, not extending in the posterior end of the proglottid. The new genus can be distinguished fromRhinebothriumLinton, 1890,Echeneibothiumvan Beneden, 1850,RhabdotobothriumEuzet, 1953,RhinebothroidesMayes, Brooks et Thorson, 1981,ScalithriumBall, Neifar et Euzet, 2003 by the absence of facial loculi on the bothridia and by numerous vitelline follicles, stopping at the anterior margin of the ovary; fromRhodobothriumLinton, 1889 - by absence of post-poral testes, and fromSpongiobothriumLinton, 1889 - by numerous vitelline follicles, stopping at the level of ovary.C. ruhnkeisp. n. differs fromC. healyaesp. n. in the lengths of the strobila, the cephalic peduncle and the bothridia pedicel, in size of marginal loculi and the ovary, in the number of the proglottids and the testes in the proglottid, and in the structure of genital atrium. Two new species are differentiated also from the morphologically related speciesPhyllobothrium pastinacaeMokhtar-Mocamouri, Zamali, 1981. Examined type specimens ofP. pastinacaewere attributed to Rhinebothiidea based on a set of morphological characters. However, they appear to differ from all known Rhinebothriidea, including the species from the generaAnthocephalumLinton, 1890 andCairaeanthusgen. n. Taxonomic position ofP.pastinacaeneeds further identification.

Artificial radionuclides, mercury, lead, and oil components in sediment cores as markers of the Anthropocene Epoch

2021 ◽  
Author(s):  
Yury Fedorov ◽  
Andrey Kuznetsov ◽  
Irinageo Dotsenko ◽  
Anna Mikhailenko
Keyword(s):  
Bottom Sediments ◽  
Working Group ◽  
Anthropogenic Impact ◽  
Sediment Cores ◽  
Water Bodies ◽  
Sedimentation Rates ◽  
Sea Of Azov ◽  
The Holocene ◽  
The Sea Of Azov ◽  
Oil Components

<p>The majority of researches of the Working group on the ‘Anthropocene’ of the International Commission on Stratigraphy (ICS) voted for the recognition of the Anthropocene as a formal chrono-stratigraphic unit characterized by profound alterations of several conditions and processes on Earth by human impact. It is also proposed to place its beginning and the end of the Holocene epoch in the mid-20th century, coinciding with the launch of nuclear weapon tests [1]. In contemporary sediment cores of the Sea of ​​Azov, the Don and the Kuban rivers, we will distinguish a "layer of anthropogenic impact", meaning the layer containing considerable quantities of technogenic material and (or) pollutants [2]. To reveal the chronology of its formation, its thickness, and boundaries, it is proposed to use the results of layer-by-layer determining of the Cs-137 and Am-241 specific activities, as well as the content of oil components, lead and mercury in the bottom sediments of the water bodies. The upper Cs-137 peak formed due to the Chernobyl accident and sometimes the lower Cs-137 and Am-241 peaks related to the global radioactive fallout in the 1950s and 1960s have been detected [3]. The decrease of mercury, lead, and oil components concentrations from the upper to the lower parts of sediment cores has also been observed. The results of analysis of technogenic radionuclides and priority pollutants distribution have proved that since the 1950s and 1960s in the bottom sediments of the Sea of ​​Azov and water bodies of its basin the “layer of anthropogenic impact" has been being formed. Its thickness varies from 20 to 50 cm and may even exceed 50 cm in areas characterized by high sedimentation rates. It has been found out that in the mid-20th century the ecosystem of the Sea of ​​Azov began to suffer from intense anthropogenic pressure, which reached its maximum in the 1970s and 1980s. It is proposed to consider the studied pollutants (technogenic radionuclides, mercury, lead, and oil components) as a possible set of priority markers of the Anthropocene epoch. The Holocene - Anthropocene boundary should be placed at the base of the identified “layer of anthropogenic impact”.</p><p> </p><p>The research was supported by the Russian Foundation for Basic Research, project no. 19-05-50097.</p><p> </p><p>Bibliography</p><p>[1] Working Group on the ‘Anthropocene’. Results of binding vote by AWG. http://quaternary.stratigraphy.org/working-groups/anthropocene/ (last accessed 17 January 2021).</p><p>[2] Kuznetsov A.N., Fedorov Yu.A., and Yaroslavtsev V.M. (2018) Technogenic and natural radionuclides in the bottom sediments of the Sea of Azov: regularities of distribution and application to the study of pollutants accumulation chronology. IOP Conference Series: Earth and Environmental Science 107, 012063.</p><p>[3] Fedorov Yu.A., Kuznetsov A.N., and Trofimov M.E. (2008) Sedimentation rates in the Sea of Azov inferred from Cs-137 and Am-241 specific activity. Doklady Earth Sciences, vol. 423, no. 1, pp. 1333-1334.</p>

Paleoceanology of the Sea of Azov in the Holocene (Based on Geological Survey Data and Investigation of Malacofauna on the Dolgaya Spit)

Oceanology ◽  
2021 ◽  
Vol 61 (4) ◽  
pp. 533-542
Author(s):  
G. G. Matishov ◽  
V. V. Polshin ◽  
E. P. Kovalenko ◽  
K. S. Grigorenko
Keyword(s):  
Survey Data ◽  
Geological Survey ◽  
Sea Of Azov ◽  
The Holocene ◽  
The Sea Of Azov
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