A revision of the Zoantharia Rugosa in the light of their minute skeletal structures

1950 ◽  
Vol 234 (611) ◽  
pp. 175-246 ◽  
Keyword(s):  
Great Britain ◽  
Evolutionary History ◽  
Coral Skeleton ◽  
Thin Sections ◽  
The Third ◽  
Systematic Significance ◽  
Rugose Corals ◽  
Rugose Coral ◽  
History Of

In this communication an attempt is made to describe the minute structures of the rugose coral skeleton and to revise the classification of the Zoantharia on that basis. The paper falls into three main sections. In the first, the various structures observed in the skeleton are described and suggestions made concerning the relationships between the soft and hard parts. The conclusions arrived at are based on the investigation of a large number of thin sections in various museums and other geological institutions in Great Britain and on my own material collected in China. The second part comprises an analysis of these features, an attempted evaluation of their systematic significance, and a résumé of the evolutionary history of the rugose corals. This résumé is mainly based on a direct study of accessible material and partly on reinterpretation of the literature in the light of new observations. The third part deals with classification and the diagnoses of the suborders, families, subfamilies and genera. For each genus recognized, the genotype is cited and a diagnosis given, together with geological range and, if any, subgenera and synonyms. Only those references not contained in the Index of Palaeozoic Coral Genera are listed in the bibliography.

The earliest rugose coral

2012 ◽  
Vol 150 (2) ◽  
pp. 371-380 ◽  
Author(s):  
CHRISTIAN BAARS ◽  
MANSOUREH GHOBADI POUR ◽  
ROBERT C. ATWOOD
Keyword(s):  
Evolutionary History ◽  
Central Iran ◽  
Rock Matrix ◽  
X Ray ◽  
Middle Ordovician ◽  
Rugose Corals ◽  
Rugose Coral ◽  
Form Part ◽  
History Of ◽  
Taxonomic Studies

AbstractRugose corals are thought to have evolved from an ancestral anthozoan during the Middle Ordovician Epoch even though there is a lack of fossil evidence for the early evolutionary history of the Rugosa. Previously documented species of early rugose corals are all assigned to the main orders Calostylina, Streptelasmatina, Cystiphyllina and Stauriina, which had all evolved by the late Sandbian. Lambelasma? sp., a new rugose coral, was recovered from the upper Darriwilian (Middle Ordovician) part of the Shirgesht Formation of Central Iran. One of the fossils, partly embedded in rock matrix, was examined using synchrotron X-ray tomography, which is here demonstrated to be a useful tool in palaeontological taxonomic studies. The new fossils form part of a mid-latitude Gondwana fauna and are the earliest record of rugose corals to date. The specimens combine features of both the Streptelasmatina and Calostylina, but are here assigned to the Lambelasmatidae (Calostylina) on the grounds of a very deep calice, the pinnate arrangement of the septa and a lack of synapticulae and tabulae.

(A review). BRAUN-BLANQUETIA. Recueil de travaux de geobotanique / review of geobotanical monographs. Vol. 46. Centenaire de la phytosociologie. CAMERINO, 2010. 423 p.

2011 ◽  
pp. 143-147
Author(s):  
L. G. Naumova ◽  
V. B. Martynenko ◽  
S. M. Yamalov
Keyword(s):  
Plant Association ◽  
Northern Asia ◽  
The Third ◽  
International Botanical ◽  
International Botanical Congress ◽  
History Of ◽  
Definition Of

Date of «birth» of phytosociology (phytocenology) is considered to be 1910, when at the third International Botanical Congress in Brussels adopted the definition of plant association in the wording Including Flaó and K. Schröter (Flahault, Schröter, 1910; Alexandrov, 1969). The centenary of this momentous event in the history of phytocenology devoted to the 46th edition of the Yearbook «Braun-Blanquetia», which began to emerge in 1984 in Camerino (Italy) and it has a task to publish large geobotanical works. During the years of the publication of the Yearbook on its pages were published twice work of the Russian scientists — «The steppes of Mongolia» (Z. V. Karamysheva, V. N. Khramtsov. Vol. 17. 1995), and «Classification of continental hemiboreal forests of Northern Asia» (N. B. Ermakov in collaboration with English colleagues and J. Dring, J. Rodwell. Vol. 28. 2000).

scholarly journals Out of the Qinghai-Tibetan Plateau (QTP) and rapid radiation across Eurasia for Allium section Daghestanica (Amaryllidaceae)

AoB Plants ◽  
2021 ◽  
Author(s):  
Min-Jie Li ◽  
Huan-Xi Yu ◽  
Xian-Lin Guo ◽  
Xing-Jin He
Keyword(s):  
Evolutionary History ◽  
Divergence Time ◽  
Time Estimation ◽  
Adjacent Region ◽  
Rapid Radiation ◽  
Divergence Time Estimation ◽  
Species Diversification ◽  
The Third ◽  
Evolutionary Line ◽  
History Of

Abstract The disjunctive distribution (Europe-Caucasus-Asia) and species diversification across Eurasia for the genus Allium sect. Daghestanica has fascinating attractions for researchers aiming to understanding the development and history of the modern Eurasia flora. However, no any studies have been carried out to address the evolutionary history of this section. Based on the nrITS and cpDNA fragments (trnL-trnF and rpl32-trnL), the evolutionary history of the third evolutionary line (EL3) of the genus Allium was reconstructed and we further elucidate the evolutionary line of sect. Daghestanica under this background. Our molecular phylogeny recovered two highly supported clades in sect. Daghestanica: the Clade I includes Caucasian-European species and Asian A. maowenense, A. xinlongense and A. carolinianum collected in Qinghai; the Clade II comprises Asian yellowish tepal species, A. chrysanthum, A. chrysocephalum, A. herderianum, A. rude and A. xichuanense. The divergence time estimation and biogeography inference indicated that Asian ancestor located in the QTP and the adjacent region could have migrated to Caucasus and Europe distributions around the Late Miocene and resulted in further divergence and speciation; Asian ancestor underwent the rapid radiation in the QTP and the adjacent region most likely due to the heterogeneous ecology of the QTP resulted from the orogeneses around 4–3 Mya. Our study provides a picture to understand the origin and species diversification across Eurasia for sect. Daghestanica.

A Bibliography of the Tectonics of England and Wales

1932 ◽  
Vol 69 (5) ◽  
pp. 233-237
Author(s):  
R. H. Rastall
Keyword(s):  
Great Britain ◽  
British Isles ◽  
England And Wales ◽  
The Third ◽  
Tectonic History ◽  
History Of ◽  
The Subject

FOR more than twenty-five years the compiler of this bibliography has been deeply interested in the tectonic history of the British Isles: for the greater part of this time he has also been struck by the absence of any adequate and annotated treatment of the subject, since the appearance of the third edition of Jukes-Browne's Building of the British Isles, 1911. (The so-called 4th edition of this work, dated 1922, appears to be merely an unrevised reprint of the 3rd edition.) In 1929 this want was in part supplied by the publication of The Physiographical Evolution of Britain, by Dr. L. J. Wills. Even in this admirable work, however, the stress is on physiography rather than on tectonics, and many of the more important writings on this side of the subject are not referred to. In the Handbook of the Geology of Great Britain, which appeared in the same year, the exiguous section on “Morphology” includes no bibliography, while the whole scheme of treatment is in the main palaeontological, and little help on the tectonic aspect is to be obtained from the text of most of the sections. The present publication may in a sense be regarded as a supplement to that work.

The shared evolutionary history of kinship classifications and language

2010 ◽  
Vol 33 (5) ◽  
pp. 402-403 ◽  
Author(s):  
Robert M. Seyfarth ◽  
Dorothy L. Cheney
Keyword(s):  
Human Evolution ◽  
Evolutionary History ◽  
The Other ◽  
History Of ◽  
System Maps

AbstractAmong monkeys and apes, both the recognition and classification of individuals and the recognition and classification of vocalizations constitute discrete combinatorial systems. One system maps onto the other, suggesting that during human evolution kinship classifications and language shared a common cognitive precursor.

scholarly journals Deep time diversity and the early radiations of birds

2021 ◽  
Vol 118 (10) ◽  
pp. e2019865118
Author(s):  
Yilun Yu ◽  
Chi Zhang ◽  
Xing Xu
Keyword(s):  
Evolutionary History ◽  
Large Scale ◽  
Evolutionary Rate ◽  
Rapid Evolution ◽  
Morphological Data ◽  
Deep Time ◽  
The Third ◽  
Time Diversity ◽  
History Of

Reconstructing the history of biodiversity has been hindered by often-separate analyses of stem and crown groups of the clades in question that are not easily understood within the same unified evolutionary framework. Here, we investigate the evolutionary history of birds by analyzing three supertrees that combine published phylogenies of both stem and crown birds. Our analyses reveal three distinct large-scale increases in the diversification rate across bird evolutionary history. The first increase, which began between 160 and 170 Ma and reached its peak between 130 and 135 Ma, corresponds to an accelerated morphological evolutionary rate associated with the locomotory systems among early stem birds. This radiation resulted in morphospace occupation that is larger and different from their close dinosaurian relatives, demonstrating the occurrence of a radiation among early stem birds. The second increase, which started ∼90 Ma and reached its peak between 65 and 55 Ma, is associated with rapid evolution of the cranial skeleton among early crown birds, driven differently from the first radiation. The third increase, which occurred after ∼40 to 45 Ma, has yet to be supported by quantitative morphological data but gains some support from the fossil record. Our analyses indicate that the bird biodiversity evolution was influenced mainly by long-term climatic changes and also by major paleobiological events such as the Cretaceous–Paleogene (K–Pg) extinction.

An Analysis of the Sectional Classification of Anthurium (Araceae): Comparing Infrageneric Groupings and Their Diagnostic Morphology with a Molecular Phylogeny of the Genus

2019 ◽  
Vol 104 (1) ◽  
pp. 69-82 ◽  
Author(s):  
Mónica M. Carlsen ◽  
Thomas B. Croat
Keyword(s):  
Molecular Phylogeny ◽  
Evolutionary History ◽  
Morphological Characters ◽  
Taxon Sampling ◽  
Species Relationships ◽  
History Of ◽  
Sectional Classification

This study presents an evaluation of the currently accepted sectional classification of the genus Anthurium Schott (Araceae) in light of a recently published molecular phylogeny for the group. In general, disagreements between these two occur because many diagnostic morphological characters used in the sectional classification turned out to be highly homoplasious within Anthurium, with multiple independent gains or losses of seemingly similar morphologies in distantly related clades. A new sectional classification of Anthurium that more accurately represents species relationships and the evolutionary history of the genus is much needed, and here we propose the first steps toward it. Results from this study suggest that out of the 18 sections and two series recognized in Anthurium, only seven of these groups are monophyletic (i.e., sections Andiphilum (Schott) Croat, Calomystrium (Schott) Engl., Dactylophyllium (Schott) Engl., Leptanthurium (Schott) Engl., Polyphyllium Engl., Tetraspermium (Schott) Engl., and the newly recognized section Multinervia (Croat) Carlsen & Croat, previously a series within section Pachyneurium (Schott) Engl.). All other sections are either not monophyletic or their monophyly could not be accurately tested. A complete revision of the sectional classification of Anthurium will require a more comprehensive taxon sampling and a better supported molecular phylogeny.

The Problem of Truth in the Light of Recent Discussion

2005 ◽  
pp. 681-710
Keyword(s):  
Human Activity ◽  
Natural Environment ◽  
Human Life ◽  
Recent Discussion ◽  
Evolutionary Processes ◽  
The Third ◽  
Human Thought ◽  
History Of ◽  
History Of Institutions

This chapter examines the nature of truth. It provides a classification of the main motives which are represented by the principal recent theories regarding the nature of truth. First, there is the motive especially suggested by the study of the history of institutions, by people's whole interest in what are called “evolutionary processes,” and by a large part of people's recent psychological investigation. This is the motive which leads many to describe human life altogether as a more or less progressive adjustment to a natural environment. The second motive is the same as that which, in ethics, is responsible for so many sorts of recent Individualism. It is the longing to be self-possessed and inwardly free, the determination to submit to no merely external authority. Meanwhile, the third motive has led to the discovery of what are novel truths regarding the fundamental relations upon which all of human thought and human activity rest.

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