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Des miospores du Cénomanien moyen

Abstract : The sporopollinical analysis o f palynofloras o f several samples dated from the Mid­ dle Cenomanian by the associated faunas allows one to propose a palynostratigraphical succession for that part o f the Cenomanian. A list of the main taxa is presented in order to show the diversity of the plant groups. Stress is laid on the presence, in Western Europe and in the United States, o f the same genera at the same latitudes. From an ecological point o f view : 1) the passage from assem­ blages with Araucariacites to palynofloras including Phyllocladidites genus ; 2) the variation o f taxo­ nomic diversity observed along the succession seem to point out quantitative as well as seasonal changes in hygrometry. Among one hundred and thirty forms listed, one new species is described : Classopollis tenuirimulatus and two nov. comb, are proposed : Trilobosporites major (ex Matonis- porites major Deak) and Camarozonosporites orbiculatus (ex Duplexisporites orbiculatus Deak & Combaz).
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Submitted on : Tuesday, June 20, 2017 - 1:23:19 PM
Last modification on : Wednesday, June 28, 2017 - 1:11:10 AM
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  • HAL Id : insu-01543004, version 1



Catherine Azéma, Suzanne Durand, Jacques Medus. Des miospores du Cénomanien moyen . 1972, Montpellier, France. III (4), pp.1-54, 1972. ⟨insu-01543004⟩



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