The Enigma of Angiosperm OriginsCambridge University Press, 4 ago 1994 - 303 páginas The origins of angiosperms are still debated, despite many years of work by scientists from differing disciplines. The progress made toward resolving the problem is reviewed in this book. The author suggests that the only fruitful method of study is the total integrated use of the fossil record, particularly dispersed palynomorphs. This includes the use of electron microscopy and refined data handling to record the occurrence of microscopic fossils, rather than the extensive use of morphology and cladistics. The methods advocated in this book could result in a rethinking of the current classification of living plants, and it is hoped that the ideas presented will initiate discussion between both professionals and students of paleontology and plant science on the wider possibilities that may clarify the enigmatic origins of the dominant flowering plant groups. |
Índice
The setting of the problem | 1 |
Current contributions on origin | 6 |
Challenges to customary procedures | 13 |
Working principles | 21 |
Stratigraphic framework | 27 |
General Mesozoic palynologic evidence | 34 |
Integration of Mesozoic floras and faunas | 43 |
The evidence for Cretaceous origin | 55 |
Cretaceous angiosperm consolidation | 215 |
Consequences and conclusions | 225 |
Research unattained but possible | 231 |
Principles time and choice | 234 |
General biological conclusions | 246 |
Glossary | 255 |
| 270 | |
| 291 | |
English Barremian monosulcate pollen | 118 |
First convincing angiospermous fossils | 197 |
Otras ediciones - Ver todo
Términos y frases comunes
Albian angio angiosperm angiosperm origin appears Aptian assemblages Atherfield Bajocian Barremian Berriasian Borehole Carboniferous carpel Caytonia Cenomanian Cenozoic characters Classopollis conifer cuticle Cycadeoidea described Dilcher dispersed pollen Doyle Early Cretaceous Ephedripites Eucommiidites evidence evolution evolutionary exine explanation of Fig extant floras flowers FORMATION PERIOD CLASSIFICATION fossil record Geol geologic gymnosperms Hauterivian Holocene Hughes Hunstanton insects Isle of Wight Kingsclere Kingsclere Borehole Krassilov Late Cretaceous Late Jurassic Late Triassic Laurasia leaf leaves Leptostrobus living plants Maastrichtian MCT pollen megafossil mesofossils Mesozoic Mesozoic Pollenifera mid-Cretaceous monocotyledons occurrence organ ovules paleolatitudes Paleotaxon palynologic palynomorphs PERIOD CLASSIFICATION 90 Permian Phase plant fossils pollen grains probably pteridophytes radiation Retisulc group ROCK FORMATION PERIOD Sagenopteris sample numbers SCALE ROCK FORMATION SCALE STRAT seed-plants seeds SEMG of Retisulc species specimens spores strata stratigraphic succession taxa tectate Tempskya time-scale tricolpate Valanginian Warlingham Warlingham Borehole WD12 AMD WD12 Fig Wealden Williamsonia Williamsoniella Yorkshire
Pasajes populares
Página 273 - COUPER RA, 1958 — British mesozoic microspores and pollen grains. A systematic and stratigraphie study. Palaeontographica Abt.
Página 274 - Plants and Invertebrates from the Lower Cretaceous Koonwarra Fossil Bed, South Gippsland, Victoria".
Página 271 - On the Cycadeoideae, a Family of Fossil Plants found in the Oolite quarries of the Isle of Portland. Trans. Geol. Soc.
Página 275 - Doyle, JA & Hickey, LJ, 1976: Pollen and leaves from the Mid-Cretaceous Potomac Group and their bearing on early angiosperm evolution. In: Beck, CB (ed.), Origin and early evolution of angiosperms, 139-206.
Página 273 - EM (1987). The evolution of insect pollination in angiosperms. In Friis, EM, Chaloner, WG and Crane, PR (Eds.). The origins of angiosperms and their biological consequences. Cambridge University Press, Cambridge, pp.
Página 276 - Pedersen, KR (1990). Lauraceous flowers from the Potomac Group (Mid-Cretaceous) of Eastern North America. Bot.
Página 274 - DAVIS, PH and HEYWOOD, VH 1963. Principles of Angiosperm Taxonomy.
Página 273 - Crane, PR, Friis, EM and Pedersen, KR (1986). Lower Cretaceous angiosperm flowers: fossil evidence on early radiation of dicotyledons. Science 232, 852-4.
Página 277 - Greenwood, DR, 1992. Taphonomic constraints on foliar physiognomic interpretations of Late Cretaceous and Tertiary palaeoclimates. Review of Palaeobotany and Palynology 71: 149-190.
Página 276 - Syktus, JL (1992). Climate modes of the Phanerozoic. Cambridge University Press, Cambridge, 274 pp.