Fruits of Anacardiaceae from the Paleogene of the Paris Basin, France

International Journal of Plant Sciences, Journal Year: 2023, Volume and Issue: 184(3), P. 164 - 176

Published: Jan. 17, 2023

Premise of research. The Anacardiaceae family is distributed throughout the vegetated continents. fossil record indicates extensive diversification during Paleogene and, in particular, Eocene. Despite abundant this period, there are only a few reliable anacardiaceous fossils Paris Basin. Here, we aim to document newly recognized from Basin, understand their paleoecology, and discuss biogeographic history.Methodology. Thirty-three lignite fruits were examined two sites, one before after Paleocene-Eocene boundary (i.e., Petit Pâtis [Rivecourt] Le Quesnoy [Houdancourt]). specimens photographed, anatomy was studied using computed tomography histological sections. Comparative analyses undertaken available descriptions modern Anacardiaceae.Pivotal results. A new species, Cyrtocarpa biapertura sp. nov., described on basis unilocular fruit with prominent apertures present ventral side endocarp, protruding into lacunae surrounding locule. Taphonomic analysis that plant grew close riverbanks. Furthermore, "Lannea" europaea (Reid Chandler) Chandler reported for Eocene site.Conclusions. occurrence both Paleocene floras Basin suggests similar vegetation time intervals. It likely under subtropical climates. Moreover, it appears early shows an enrichment paleodiversity other families presence documents rarely disjunction between Europe recent tropical flora South America.

Language: Английский

Earliest Fossil Record of Burseraceae from the Deccan Intertrappean Beds of Central India and Its Biogeographic Implications

International Journal of Plant Sciences, Journal Year: 2023, Volume and Issue: 184(9), P. 696 - 714

Published: July 5, 2023

Premise of research. Burseraceae is represented by a large number fossils from the Cenozoic sedimentary succession and has disjunct distribution today in southern part North America, Africa, Europe, Asia. However, family poor fossil record deep time, making hypotheses concerning its origin dispersal difficult to evaluate. Here, we report occurrence reproductive organs (fruit flower) attributable modern probable latest Maastrichtian (Late Cretaceous) earliest Danian (early Paleocene) sediments Mandla Lobe Deccan Intertrappean beds Madhya Pradesh, Central India.Methodology. X-ray micro–computed tomography was used observe three-dimensional structures. The reconstruction software takes 2D projection images acquired detector generates 3D image gray values distributed volumetric space. present fruit flower are identified through morphological comparison with another extant Burseraceae.Pivotal results. pyrene corresponds morphology that (particularly some genera Protieae Bursereae), while flower, pentamerous organization sepals petals ovary 10 stamens arranged two whorls around prominent intrastaminal nectary disk, particularly similar Protium. here described as new species genus Bursericarpum Reid et Chandler indicum Kumar, Manchester Khan sp. nov. Debursera indica Manchester, Judd nov.Conclusions. discoveries represent oldest reliable records supporting Gondwanan origin. These also provide important information for tracing possible migration pathways India Europe after docking Indian subcontinent Eurasia during early Eocene (55±10 Ma), an "out-of-India" hypothesis. Based on earlier suggest might have reached then colonized America (during Eocene) areas where it now regionally extinct.

Language: Английский

Comparative Nut Morphology and Biogeographic Implications of Carya ventricosa from the Miocene of Europe

International Journal of Plant Sciences, Journal Year: 2023, Volume and Issue: 185(2), P. 109 - 128

Published: Oct. 12, 2023

Language: Английский