Late Cretaceous Flora of the Zyryanka Coal Basin in Northeastern Russia: Composition, Age, and Plant Communities

2021 ◽  
Vol 29 (1) ◽  
pp. 55-64
Author(s):  
A. B. Herman ◽  
S. V. Shczepetov
Keyword(s):  
Plant Communities ◽  
Late Cretaceous ◽  
Northeastern Russia ◽  
Coal Basin

scholarly journals Asynchronous origins of ectomycorrhizal clades of Agaricales

2011 ◽  
Vol 279 (1735) ◽  
pp. 2003-2011 ◽  
Author(s):  
Martin Ryberg ◽  
P. Brandon Matheny
Keyword(s):  
Plant Communities ◽  
Ribosomal Rna ◽  
Late Cretaceous ◽  
Fungal Diversity ◽  
Evolutionary Transitions ◽  
Nutritional Mode ◽  
Ecm Fungi ◽  
Rate Of Substitution ◽  
Rapid Radiations

The ectomycorrhizal (ECM) symbiosis is the most widespread biotrophic nutritional mode in mushroom-forming fungi. ECM fungi include, though are not limited to, about 5000 described species of Agaricales from numerous, independently evolved lineages. Two central hypotheses suggest different explanations for the origin of ECM fungal diversity: (i) dual origins, initially with the Pinaceae in the Jurassic and later with angiosperms during the Late Cretaceous, and (ii) a simultaneous and convergent radiation of ECM lineages in response to cooling climate during the Palaeogene and advancing temperate ECM plant communities. Neither of these hypotheses is supported here. While we demonstrate support for asynchronous origins of ECM Agaricales, the timing of such events appears to have occurred more recently than suggested by the first hypothesis, first during the Cretaceous and later during the Palaeogene. We are also unable to reject models of rate constancy, which suggests that the diversity of ECM Agaricales is not a consequence of convergent rapid radiations following evolutionary transitions from saprotrophic to ECM habits. ECM lineages of Agaricales differ not only in age, but also in rates of diversification and rate of substitution at nuclear ribosomal RNA loci. These results question the biological uniformity of the ECM guild.

New data about the Late Cretaceous floras of the Ulya depression (western coast of Sea of Okhotsk)

Palaeobotany ◽  
2013 ◽  
Vol 4 ◽  
pp. 148-167 ◽  
Author(s):  
L. B. Golovneva
Keyword(s):  
River Basin ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Sea Of Okhotsk ◽  
Northeastern Russia ◽  
Western Coast ◽  
Fossil Plants ◽  
Sedimentary Deposits ◽  
Volcanogenic Belt ◽  
Systematic Composition

New investigation of fossil plants from volcanic-sedimentary deposits of the Amka Formation in Ulya River basin (southern part of the Okhotsk-Chukotka volcanogenic belt, Northeastern Russia) shows, that the Arinda, Uenma, Ust-Amka and Gyrbykan floristic assemblages from diff erent localities of this formation have very close systematic composition. We propose to joint these assemblages in the single regional flora, which is named the Ulya flora. The Ulya flora consists of almost 40 species. The majority of them are represented by new undescribed taxa. In this flora gymnosperms (Phoenicopsis ex gr. speciosa Heer, Ginkgo ex gr. adiantoides (Ung.) Heer, G. ex gr. sibirica Heer, Sphenobaiera sp., Podozamites sp., Elatocladus spp., Araucarites sp., Sequoia sp., Metasequoia sp., Cupressinocladus sp., Ditaxocladus sp., Pityophyllum sp., Pityostrobus sp.) predominate. Ferns (Asplenium dicksonianum Heer, Arctopteris sp., Cladophlebis spp. and several undescribed taxa) and angiosperms (Trochodendroides spp., undetermined Platanaceae, Dicotylophyllum spp., Quereuxia angulate (Newb.) Krysht. ex Baik.) are not abundant. This flora is characterized by presence of the Early Cretaceous relicts (Phoenicopsis, Sphenobaiera and Podozamites), by rarity of angiosperms and by high endemism. On the base of comparison of the Ulya flora with other floras from middle and northern parts of the Okhotsk-Chukotka volcanogenic belt, the age of the Ulya flora is estimated as the Coniacian.

The distribution of the genus Dalembia E. Lebedev et Herman (Magnoliophyta) in Late Cretaceous floras of Northern Pacifica

Palaeobotany ◽  
2016 ◽  
Vol 7 ◽  
pp. 66-79 ◽  
Author(s):  
D. A. Yudova ◽  
L. B. Golovneva ◽  
P. I. Alekseev
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Western Siberia ◽  
Geographical Area ◽  
Northern China ◽  
Northeastern Russia ◽  
Pacific Region ◽  
Eastern Siberia ◽  
New Findings ◽  
Stratigraphic Range

New findings of the genus Dalembia from Late Cretaceous sediments are described: Dalembia sp. from lower part of the Sym Formation (Coniacian – Santonian) of Eastern Siberia; Dalembia sp. from upper part of the Timmerdyakch Formation (Turonian – Coniacian) of Western Siberia; D. vachrameevii E. Lebedev et Herman and the new species D. argentea Yudova et Golovneva from the Chingandzha Formation (Turonian – Coniacian) of Okchotsk-Chukotka volcanogenic belt (Northeastern Russia). The stratigraphic range of the genus Dalembia stretch from the late Albian to Campanian. The geographical area includes the territories of Alaska, northern China, Northeastern Russia, Western and Eastern Siberia. The highest quantity of occurrences associated with Nothern Pacific region.

New species of the genus Sequoia Endlicher (Cupressaceae) from the Late Cretaceous deposits of the Northeastern Russia

Palaeobotany ◽  
2015 ◽  
Vol 6 ◽  
pp. 80-95 ◽  
Author(s):  
D. A. Yudova ◽  
L. B. Golovneva
Keyword(s):  
New Species ◽  
River Basin ◽  
Late Cretaceous ◽  
Volcanic Belt ◽  
Northeastern Russia ◽  
Eastern Siberia ◽  
New Siberian Islands ◽  
Chukotka Volcanic Belt ◽  
Epidermal Features ◽  
Cretaceous Deposits

New species Sequoia ochotica Yudova et Golovn. (Pinopsida, Cupressaceae) from the Turonian-Coniacian deposits of the Arman and Chingandzha Formations of the Okhotsk-Chukotka volcanic belt is described based at morphological features of leaves and shoots. Two other Late Cretaceous species of this genus: S. minuta Sveshn. from the Vilyui River basin of Eastern Siberia and S. tenuifolia (Schmalh.) Sveshn. et Budants. from the New Siberian Islands have comparable shoot morphology, but these species were described based at epidermal features.

The late Cretaceous Arman flora of Magadan oblast, Northeastern Russia

2016 ◽  
Vol 24 (7) ◽  
pp. 651-760 ◽  
Author(s):  
A. B. Herman ◽  
L. B. Golovneva ◽  
S. V. Shczepetov ◽  
A. A. Grabovsky
Keyword(s):  
Late Cretaceous ◽  
Northeastern Russia ◽  
Magadan Oblast

Late Cretaceous and Cenozoic History of North American Vegetation (North of Mexico)

1999 ◽  
Author(s):  
Alan Graham
Keyword(s):  
Environmental Change ◽  
Plant Communities ◽  
Late Cretaceous ◽  
North American ◽  
Causal Factors ◽  
The Past ◽  
Biotic Response ◽  
History Of

This book is a unique and integrated account of the history of North American vegetation and paleoenvironments over the past 70 million years. It includes discussions of the modern plant communities, causal factors for environmental change, biotic response, and methodologies. The history reveals a North American vegetation that is vast, immensely complex, and dynamic.

Sr–Nd isotopic characteristics of the Late Cretaceous Shuangyashan suite: evidence for enriched mantle 2 in Northeast China

2011 ◽  
Vol 149 (4) ◽  
pp. 645-661 ◽  
Author(s):  
LEI ZHANG ◽  
BAO-FU HAN ◽  
JIA-FU CHEN ◽  
ZHAO XU
Keyword(s):  
Late Cretaceous ◽  
Northeast China ◽  
Igneous Rocks ◽  
Coal Basin ◽  
Enriched Mantle ◽  
Eurasian Continent ◽  
Depleted Mantle ◽  
Subduction Setting ◽  
End Members ◽  
Focal Zone

AbstractIn Northeast China, large volumes of Mesozoic–Cenozoic igneous rocks have developed as a result of long-lasting subduction of the palaeo-Pacific and Pacific plates beneath the eastern Eurasian continent. Previous studies have convincingly confirmed the presence of depleted mantle (DM), FOcal ZOne (FOZO) mantle and enriched mantle 1 (EM1) end-members; the enriched mantle 2 (EM2) end-member is probably present but it has been poorly constrained. The Late Cretaceous Shuangyashan suite, comprising a monzogabbro and diorite–porphyrite stocks and their cumulate hornblendite enclaves, from the Shuangyashan coal basin, Northeast China, is characterized by high initial87Sr/86Sr (0.70922–0.71095) and low initial143Nd/144Nd ratios (0.51221–0.51238) at 98 Ma. Their occurrence demonstrates that EM2 is present in the lithospheric mantle of Northeast China and its formation may be related to recycled continental material in a subduction setting.

The genus Trochodendroides Berry in the Chingandzha flora of Northeastern Russia

Palaeobotany ◽  
2014 ◽  
Vol 5 ◽  
pp. 60-72 ◽  
Author(s):  
D. A. Yudova ◽  
L. B. Golovneva
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Northeastern Russia ◽  
Cretaceous Deposits

Three species of Trochodendroides were described fr om the Late Cretaceous deposits of the Chingandzha Formation. Two of them (T. tumanensis Yudova, sp. nov. and T. deminii Yudova et Golovn., sp. nov.) were described as new species, and one was described as Trochodendroides sp. Comparison of new species of the genus Trochodendroides of the Chingandzha flora with representatives of this genus in other Late Cretaceous floras of Northeastern Russia shows that they were presented in composition of the Coniacian Tylpegyrgynai flora of the Pekulnei ridge too, wh ere they were described with other species names (Trochodendroides arctica (Heer) Berry, and Zizyphus smilacifolia Budants.). The presence of the same species shows a similarity of the Chingandzha with Tylpegyrgynai flora and confirms the Coniacian age of the Chingandzha flora.

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