New records of extinct Icacinaceae from Paleocene rainforests of northwestern South America.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος:	New records of extinct Icacinaceae from Paleocene rainforests of northwestern South America.
Συγγραφείς:	Puente-Santos LM; Universidad Nacional de Colombia, Bogotá, Colombia.; Smithsonian Tropical Research Institute, Panama.; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, 48109, Michigan, USA.; Museum of Paleontology, University of Michigan, Ann Arbor, 48109, Michigan, USA., Carvalho MR; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, 48109, Michigan, USA.; Museum of Paleontology, University of Michigan, Ann Arbor, 48109, Michigan, USA., Shirley E; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, 48109, Michigan, USA.; Museum of Paleontology, University of Michigan, Ann Arbor, 48109, Michigan, USA., Herrera F; Earth Sciences, Negaunee Integrative Research Center, Field Museum, Chicago, 60605, Illinois, USA.
Πηγή:	American journal of botany [Am J Bot] 2026 Jul; Vol. 113 (7), pp. e70237. Date of Electronic Publication: 2026 Jul 16.
Τύπος έκδοσης:	Journal Article
Γλώσσα:	English
Στοιχεία περιοδικού:	Publisher: Wiley Country of Publication: United States NLM ID: 0370467 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1537-2197 (Electronic) Linking ISSN: 00029122 NLM ISO Abbreviation: Am J Bot Subsets: MEDLINE
Imprint Name(s):	Publication: <2018-> : [Philadelphia, PA] : Wiley Original Publication: Baltimore Md : Botanical Society Of America
Ιατρικοί όροι (MeSH):	Fossils/anatomy & histology , Magnoliopsida/anatomy & histology , Magnoliopsida/classification , Rainforest , Extinction, Biological*, Plant Leaves/anatomy & histology ; X-Ray Microtomography ; South America ; Colombia ; Phylogeny
Περίληψη:	Premise: This study describes three new records of Icacinaceae-Punctiuga bachue gen. et sp. nov., Palaeophytocrene paramoae sp. nov., and Goweria bacatana sp. nov. from the Paleocene (Selandian-Thanetian) Bogotá Formation in Colombia-improving understanding of the distribution and evolution of this family in the Neotropics. Methods: We analyzed 47 fossil endocarps using microscopy and X-ray micro-computed tomography (μCT); we also studied the associated leaf assemblage in search of potential Icacinaceae foliage. We then compared the fossils to extant Icacinaceae specimens from herbaria and the existing literature. Results: Punctiuga bachue features unique morphological traits that resemble and support a close affinity to Iodeae and Phytocreneae. The presence of Palaeophytocrene paramoae confirms Phytocreneae diversity in South America during the Paleocene, and the occurrence of leaves of Icacinaceae contribute to the history of Icacinaceae on the continent. Conclusions: Our results show a previously unacknowledged diversity of Icacinaceae in the Paleocene Neotropics, including two new species of endocarps with affinities to Phytocreneae and Iodeae, clades currently restricted to the Old World tropics. Our findings support an early Paleogene diversification of the family in the Neotropics and the extirpation of tropical lineages in the Neotropics during the later Cenozoic. (© 2026 The Author(s). American Journal of Botany published by Wiley Periodicals LLC on behalf of Botanical Society of America.)
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Grant Information:	DEB-2427396 National Science Foundation; EAR-1829299 National Science Foundation; Negaunee Foundation
Contributed Indexing:	Keywords: Bogotá Formation; Colombia; Icacinaceae; Neotropical rainforest; Paleocene; Phytocreneae; X‐ray microcomputed tomography (μCT); fossil endocarp; fossil leaves; paleobiogeography
Entry Date(s):	Date Created: 20260716 Date Completed: 20260729 Latest Revision: 20260730
Update Code:	20260730
PubMed Central ID:	PMC13408562
DOI:	10.1002/ajb2.70237
PMID:	42461260
Βάση Δεδομένων:	MEDLINE

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ISSN:	1537-2197
DOI:	10.1002/ajb2.70237