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5.—Additional Cytotaxonomic Notes on the Pteridophytes of Jamaica 5.-牙买加蕨类植物细胞分类学补充说明
Transactions of the Royal Society of Edinburgh Pub Date : 1973-01-01 DOI: 10.1017/S0080456800015027
T. Walker
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引用次数: 30
TRE volume 69 issue 3 Cover and Back matter TRE第69卷第3期封面和封底
Transactions of the Royal Society of Edinburgh Pub Date : 1973-01-01 DOI: 10.1017/S0080456800014952
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引用次数: 0
TRE volume 69 issue 5 Cover and Front matter TRE第69卷第5期封面和封面问题
Transactions of the Royal Society of Edinburgh Pub Date : 1973-01-01 DOI: 10.1017/S0080456800015003
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引用次数: 0
XIII.—A new interpretation of Lepidodendron calamopsoides Long and Oxroadia gracilis Alvin 十三。标题菖蒲鳞翅目与黄菖蒲的新解释
Transactions of the Royal Society of Edinburgh Pub Date : 1971-01-01 DOI: 10.1017/S0080456800014836
J. G. Long
{"title":"XIII.—A new interpretation of Lepidodendron calamopsoides Long and Oxroadia gracilis Alvin","authors":"J. G. Long","doi":"10.1017/S0080456800014836","DOIUrl":"https://doi.org/10.1017/S0080456800014836","url":null,"abstract":"Synopsis A petrified lycopod found in a loose block of calciferous sandstone from the Cementstone Group in Berwickshire possesses a rooting stem-base similar to others previously assigned to Lepidodendron calamopsoides (Long 1964) but it shows continuity with a dichotomously branched stem about 15 cm. long, lacking leaves, but otherwise resembling Oxroadia gracilis (Alvin 1965). The diagnosis of Lepidodendron calamopsoides has been emended to include only axes bearing lepidodendroid leaf cushions as previously described. The new specimen, and others with like roots are tentatively assigned to Oxroadia gracilis Alvin.","PeriodicalId":23232,"journal":{"name":"Transactions of the Royal Society of Edinburgh","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85048646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
TRE volume 68 issue 13 Cover and Front matter TRE第68卷第13期封面和封面问题
Transactions of the Royal Society of Edinburgh Pub Date : 1971-01-01 DOI: 10.1017/S0080456800014812
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引用次数: 0
XIV.—Observations on the structure of the shipworms, Nausitora hedleyi, Teredo furcifera and Teredora princesae (Bivalvia: Teredinidae) 十四。-船虫、船虫、船虫的结构观察(双壳目:船虫科)
Transactions of the Royal Society of Edinburgh Pub Date : 1971-01-01 DOI: 10.1017/S0080456800014861
B. Nair, M. Yonge, R. Purchon
{"title":"XIV.—Observations on the structure of the shipworms, Nausitora hedleyi, Teredo furcifera and Teredora princesae (Bivalvia: Teredinidae)","authors":"B. Nair, M. Yonge, R. Purchon","doi":"10.1017/S0080456800014861","DOIUrl":"https://doi.org/10.1017/S0080456800014861","url":null,"abstract":"SYNOPSIS Detailed descriptions and illustrations are presented of the structure of three representative species of tropical shipworms, Nausitora hedleyi, Teredo furcifera and Teredora princesae. The disposition of the various organ systems is described and illustrated with notes on the histology of the different regions so as to throw light on the adaptations and specializations of these unusual bivalves. The trend of evolution within the Teredinidae is discussed in the light of the available evidence contained in the present morphological studies.","PeriodicalId":23232,"journal":{"name":"Transactions of the Royal Society of Edinburgh","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72931702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
TRE volume 68 issue 13 Cover and Back matter TRE第68卷第13期封面和封底
Transactions of the Royal Society of Edinburgh Pub Date : 1971-01-01 DOI: 10.1017/S0080456800014824
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引用次数: 0
TRE volume 68 issue 10 Cover and Front matter TRE第68卷第10期封面和封面问题
Transactions of the Royal Society of Edinburgh Pub Date : 1970-01-01 DOI: 10.1017/S0080456800014721
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引用次数: 0
XI.—The Evolution of the Scottish Caledonides in Relation to their Isotopic Age Pattern 西——苏格兰Caledonides的演化与同位素年龄模式的关系
Transactions of the Royal Society of Edinburgh Pub Date : 1970-01-01 DOI: 10.1017/S0080456800014770
J. Dewey, R. Pankhurst, Ten Text-figures
{"title":"XI.—The Evolution of the Scottish Caledonides in Relation to their Isotopic Age Pattern","authors":"J. Dewey, R. Pankhurst, Ten Text-figures","doi":"10.1017/S0080456800014770","DOIUrl":"https://doi.org/10.1017/S0080456800014770","url":null,"abstract":"Synopsis Three main stages are recognized in the evolution of the Scottish Caledonian orogen. Firstly, the development of the depositional framework from late Pre-Cambrian to early Ordovician times is outlined, The thick Moine and Dalradian sediments, accumulating on a continental rise, are shown to be equivalent to the shelf sequence of the foreland, and likely correlations are suggested. Secondly, the events comprising the Caledonian deformation and metamorphism of these sediments are reviewed and related to the development of a Benioff zone and coupled oceanic trench along the southern margin of the orogen through the Ballantrae complex. Comparison of stratigraphic and isotopic evidence for the age of these events leads to the conclusion that all major deformation and metamorphism occurred during a relatively short climactic episode 480–510 m.y. ago, within the Arenigian stage of the Ordovician. The third factor in the evolution of the orogen is post-climactic uplift and erosion continuing throughout Upper Ordovician, Silurian and Lower Devonian times. Contours of K–Ar mica ages are presented and related to the geological evidence for this prolonged period of isostatic recovery and thermal adjustment. The style and timing of granitic plutonism, which is closely associated with this third stage, may be indicative of crustal behaviour during uplift rather than continued metamorphism at depth.","PeriodicalId":23232,"journal":{"name":"Transactions of the Royal Society of Edinburgh","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1970-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79681972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 133
IX.—The Postcranial Skeleton of Ensthenopteron foordi Whiteaves 9。——富氏背鳍龙颅后骨骼
Transactions of the Royal Society of Edinburgh Pub Date : 1970-01-01 DOI: 10.1017/S008045680001471X
S. M. Andrews, T. S. Westoll
{"title":"IX.—The Postcranial Skeleton of Ensthenopteron foordi Whiteaves","authors":"S. M. Andrews, T. S. Westoll","doi":"10.1017/S008045680001471X","DOIUrl":"https://doi.org/10.1017/S008045680001471X","url":null,"abstract":"Synopsis Well preserved material of the crossopterygian fish Eusthenopteron enables fresh reconstructions and interpretations of its postcranial skeleton to be given. Comparisons throughout with other bony fishes show that it may be primitive in many features. Similarities with early amphibians such as the screw-shaped glenoid, the form of the humerus (on which an attempt to restore the pectoral musculature is based), the dorsal bicipital ribs and the possibility of a sacral attachment, throw much light on the origin of the tetrapod postcranial skeleton, particularly of the cheiropterygium. A functional analysis of the skeleton of Ensthenopteron is attempted, suggesting that it resembled the pike (Esox) in its mode of life and that it may have been capable of short journeys “walking” overland. The possible selective factors stimulating the evolution of such a fish, and further evolution to the tetrapod stage are discussed.","PeriodicalId":23232,"journal":{"name":"Transactions of the Royal Society of Edinburgh","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1970-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84273573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 143
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