Bizarre tail weaponry in a transitional ankylosaur from subantarctic Chile

S Soto-Acuña, AO Vargas, J Kaluza, MA Leppe… - Nature, 2021 - nature.com
Armoured dinosaurs are well known for their evolution of specialized tail weapons—paired
tail spikes in stegosaurs and heavy tail clubs in advanced ankylosaurs. Armoured dinosaurs …

Relict duck-billed dinosaurs survived into the last age of the dinosaurs in subantarctic Chile

J Alarcón-Muñoz, AO Vargas, HP Püschel… - Science …, 2023 - science.org
In the dusk of the Mesozoic, advanced duck-billed dinosaurs (Hadrosauridae) were so
successful that they likely outcompeted other herbivores, contributing to declines in dinosaur …

First monotreme from the Late Cretaceous of South America

NR Chimento, FL Agnolín, M Manabe, T Tsuihiji… - Communications …, 2023 - nature.com
Monotremata is a clade of egg-lying mammals, represented by the living platypus and
echidnas, which is endemic to Australia, and adjacent islands. Occurrence of basal …

New records of Theropoda from a Late Cretaceous (Campanian-Maastrichtian) locality in the Magallanes-Austral Basin, Patagonia, and insights into end Cretaceous …

SN Davis, S Soto-Acuña, RA Fernández… - Journal of South …, 2023 - Elsevier
The end Cretaceous mass extinction was marked by a dramatic change in biodiversity, and
the extinction of all non-avian dinosaurs. To understand the diversity of dinosaur clades prior …

Phylogenomics illuminates the evolution of orb webs, respiratory systems and the biogeographic history of the world's smallest orb-weaving spiders (Araneae …

S Kulkarni, HM Wood, G Hormiga - Molecular Phylogenetics and Evolution, 2023 - Elsevier
The miniature orb weaving spiders (symphytognathoids) are a group of small spiders (< 2
mm), including the smallest adult spider Patu digua (0.37 mm in body length), that have …

A new fossil Acmopyle with accessory transfusion tissue and potential reproductive buds: Direct evidence for ever‐wet rainforests in Eocene Patagonia

A Andruchow‐Colombo… - American journal of …, 2023 - Wiley Online Library
Abstract Premise Acmopyle (Podocarpaceae) comprises two extant species from Oceania
that are physiologically restricted to ever‐wet rainforests, a confirmed fossil record based on …

Early Late Cretaceous mammals from southern Patagonia (Santa Cruz province, Argentina)

T Martin, FJ Goin, JA Schultz, JN Gelfo - Cretaceous Research, 2022 - Elsevier
Abstract The Upper Cretaceous (Cenomanian) Mata Amarilla Formation in western central
Santa Cruz province of Argentina has yielded fragmentary teeth of a large? docodontan, an …

Late Campanian-early Maastrichtian vertebrates from the James Ross Basin, West Antarctica: updated synthesis, biostratigraphy, and paleobiogeography

MA Reguero, Z Gasparini, EB Olivero… - Anais da Academia …, 2022 - SciELO Brasil
Abstract The Snow Hill Island Formation (SHIF; late Campanian–early Maastrichtian) crops
out in the northeast of the Antarctic Peninsula and constitutes the basal part of the late …

Reconstructing Cenozoic Patagonian biotas using multi-proxy fossil records

L Palazzesi, SF Vizcaíno, VD Barreda, JI Cuitiño… - Journal of South …, 2021 - Elsevier
The fossil record from Cenozoic sediments provides a great deal of information that has
direct bearing on the early assembling of modern Patagonian ecosystems. In this synthesis …

The rise and fall of notoungulates: How Andean uplift, available land area, competition, and depredation driven its diversification dynamics

A Solórzano, M Núñez-Flores… - Gondwana Research, 2024 - Elsevier
Unraveling the biotic and abiotic drivers likely influencing clades' diversification dynamics
(differential speciation and extinction rates) is crucial for understanding life on Earth. Here …