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Givetian-Frasnian phytogeography of Euramerica and western Gondwana based on miospore distribution

1990; Zoological Society of London; Volume: 12; Issue: 1 Linguagem: Inglês

10.1144/gsl.mem.1990.012.01.28

2041-4722

Maurice Streel, Muriel Fairon‐Demaret, Stanislas Loboziak,

Botany and Plant Ecology Studies

Abstract The Givetian and Frasnian miospore distributions in western Gondwana and southern Euramerica show a rather uniform vegetation prevailing from palaeo-polar to palaeo-tropical regions. Similar climatic conditions are certainly required to explain this but it is concluded from a discussion on the dispersal of homosporous vegetation that no wide oceans separated these regions at the time. Frasnian northern Euramerica vegetation seems different and might correspond to an equatorial belt. Heckel & Witzke's palaeogeographical reconstruction fits much better with the miospore distribution than other maps.