Fossil insect‐feeding traces indicate unrecognized evolutionary history and biodiversity on Australia's iconic Eucalyptus DOI Creative Commons
L. Alejandro Giraldo, Peter Wilf, Michael P. Donovan

и другие.

New Phytologist, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 28, 2024

Summary Fossilized plant–insect herbivore associations provide fundamental information about the assembly of terrestrial communities through geologic time. However, fossil evidence originating in deep time and persisting to modern day is scarce. We studied insect damage found on 284 Eucalyptus frenguelliana leaves from early Eocene Laguna del Hunco rainforest locality Argentinean Patagonia compared patterns with those observed extant, rainforest‐associated species Australasia (> 10 000 herbarium sheets reviewed). In material, we identified 28 herbivory types, including 12 types external feeding, one piercing‐and‐sucking, five galls, mines. All were specimens. The finding all extant specimens suggests long‐standing between multiple lineages their host genus spanning 52 million years across Southern Hemisphere. This long‐term persistence, probably enabled niche conservatism wet eucalypt forests, demonstrates imprint history composition assemblages. Although identities most culprits remain unknown, a list specific population locations facilitate discovery, highlighting relevance fossils discovering biodiversity.

Язык: Английский

SEDIMENTOLOGICAL CONTROLS ON PLANT-FOSSIL PRESERVATION IN AN EOCENE CALDERA-LAKE FILL: A HIGH-RESOLUTION, AGE-CONSTRAINED RECORD FROM THE TUFOLITAS LAGUNA DEL HUNCO, CHUBUT PROVINCE, ARGENTINA DOI
Elizabeth Hajek, J. Marcelo Krause, Peter Wilf

и другие.

Palaios, Год журнала: 2025, Номер 40(4), С. 114 - 129

Опубликована: Апрель 23, 2025

Abstract Caldera lake sediments of the early Eocene Tufolitas Laguna del Hunco (Chubut Province, Argentina) host one world’s best-preserved and most diverse fossil plant assemblages, but exceptional quality preservation remains unexplained. The fossils have singular importance because they include numerous oldest unique occurrences in South America genera that today are restricted to West Pacific region, where many them now vulnerable extinction. Lacustrine depositional settings often considered optimal for as passive receptors suspended sediment delivered, seasonally, from lakeshores. However, caldera lakes can be influenced by a broader range physical chemical processes enhance or decrease potential. Here, we use provide new perspective on paleoenvironmental controls tectonically active settings. We establish refined geochronological framework deposits present detailed history during ∼ 200,000 years filling 52.217 ± 0.014 Ma 51.988 0.035 Ma, time interval encompasses nearly all deposition. Detailed facies analysis shows productive localities reside within high-deposition-rate beds associated with high-energy density flows wave-reworked lake-floor sediments, challenging traditional views low-energy environments required well-preserved fossils. These results demonstrate even delicate components like fruits flowers survive transport, underscoring rapid burial primary control preservation. Short, steep sediment-transport networks may facilitate terrestrial limiting opportunities biochemical degradation land providing relatively frequent, events, which quickly transport bury organic material following events such landslides steep, wet, surrounding slopes. Our model taphonomy opens path toward finding understanding other biotas once unlikely

Язык: Английский

Процитировано

1
Fossils of an endangered, endemic, giant dipterocarp species open a historical portal into Borneo's vanishing rainforests DOI Creative Commons
Teng‐Xiang Wang, Peter Wilf, Antonino Briguglio

и другие.

American Journal of Botany, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Abstract Premise Asia's wet tropical forests face a severe biodiversity crisis, but few fossils record their evolutionary history. We recently discovered in situ cuticles on fossil leaves, attributed to the giant rainforest tree Dryobalanops of iconic Dipterocarpaceae family, from Plio‐Pleistocene Brunei Darussalam (northern Borneo). Studying these specimens allowed us validate generic identification and delineate affinities living dipterocarp species. Methods compared leaf architecture leaves with seven Results The cuticular features shared between extant , including presence stomata veins, confirm placement. characters are identical those D. rappa an IUCN red‐listed Endangered, northern Borneo endemic. monodominance at site, along Dipterocarpus spp. fossils, indicates dipterocarp‐dominated forest near mangrove‐swamp depocenter, most likely adjacent peatland. Conclusions first evidence endangered species show how analysis can help illuminate poorly known floristic history Asian tropics. This discovery highlights new potential for inform heritage values paleoconservation Southeast Asia.

Язык: Английский

Процитировано

0
Osmoxylon‐like fossils from early Eocene South America: West Gondwana–Malesia connections in Araliaceae DOI Creative Commons
Peter Wilf

American Journal of Botany, Год журнала: 2025, Номер unknown

Опубликована: Май 19, 2025

Abstract Premise Araliaceae comprise a moderately diverse, predominantly tropical angiosperm family with limited fossil record. Gondwanan history of is hypothesized in the literature, but no fossils have previously been reported from former supercontinent. Methods I describe large (to macrophyll size), palmately compound‐lobed leaf and an isolated umbellate infructescence early Eocene (52 Ma), late‐Gondwanan paleorainforest flora at Laguna del Hunco Argentine Patagonia. Results The are assigned to Caffapanax canessae gen. et sp. nov. (Araliaceae). Comparable living species belong five genera that primarily distributed Malesia South China. most similar genus Osmoxylon , which centered east includes numerous threatened species. Davidsaralia christophae (Araliaceae) also comparable . Conclusions leaves infructescence, potentially representing same source taxon, oldest araliaceous macrofossils provide direct evidence family. new their enrich well‐established biogeographic climatic affinities assemblage imperiled Indo‐Pacific, everwet rainforests. likely represent shrubs or small trees, adding rich record understory vegetation recovered Hunco.

Язык: Английский

Процитировано

0
Fossil insect‐feeding traces indicate unrecognized evolutionary history and biodiversity on Australia's iconic Eucalyptus DOI Creative Commons
L. Alejandro Giraldo, Peter Wilf, Michael P. Donovan

и другие.

New Phytologist, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 28, 2024

Summary Fossilized plant–insect herbivore associations provide fundamental information about the assembly of terrestrial communities through geologic time. However, fossil evidence originating in deep time and persisting to modern day is scarce. We studied insect damage found on 284 Eucalyptus frenguelliana leaves from early Eocene Laguna del Hunco rainforest locality Argentinean Patagonia compared patterns with those observed extant, rainforest‐associated species Australasia (> 10 000 herbarium sheets reviewed). In material, we identified 28 herbivory types, including 12 types external feeding, one piercing‐and‐sucking, five galls, mines. All were specimens. The finding all extant specimens suggests long‐standing between multiple lineages their host genus spanning 52 million years across Southern Hemisphere. This long‐term persistence, probably enabled niche conservatism wet eucalypt forests, demonstrates imprint history composition assemblages. Although identities most culprits remain unknown, a list specific population locations facilitate discovery, highlighting relevance fossils discovering biodiversity.

Язык: Английский

Процитировано

2