Brachyoxylon fossil woods with traumatic resin canals from the Upper Cretaceous Cerro Fortaleza Formation, southern Patagonia (Santa Cruz Province, Argentina)

Conifer Fossil Woods from the Mid-Cretaceous (Albian) Kachaike Formation, Santa Cruz Province, Argentina

“…Nevertheless, the fossil woods from the Kachaike Formation differ from B. patagonicum described by Rombola et al (2022) only in the absence of traumatic resin canals. However, these types of canals are formed as defensive responses of the plant against abiotic or biotic alterations, therefore the taxonomic relevance of this character is limited (Rombola et al, 2022).…”

“…In turn, these specimens share all the characteristics (e.g., distinct growth rings, exclusively uniseriate rays, araucarioid cross-fields with up to 8 pits per field) with Brachyoxylon patagonicum Rombola, Greppi & Pujana, from the Upper Cretaceous of Argentinean Patagonia (Rombola et al, 2022). Nevertheless, the fossil woods from the Kachaike Formation differ from B. patagonicum described by Rombola et al (2022) only in the absence of traumatic resin canals. However, these types of canals are formed as defensive responses of the plant against abiotic or biotic alterations, therefore the taxonomic relevance of this character is limited (Rombola et al, 2022).…”

“…Based on their anatomical characteristics, the specimens are assigned to the fossil genus Brachyoxylon, due to the presence of brachyoxylean radial pitting and araucarioid cross-fields (Philippe & Bamford, 2008). In turn, these specimens share all the characteristics (e.g., distinct growth rings, exclusively uniseriate rays, araucarioid cross-fields with up to 8 pits per field) with Brachyoxylon patagonicum Rombola, Greppi & Pujana, from the Upper Cretaceous of Argentinean Patagonia (Rombola et al, 2022). Nevertheless, the fossil woods from the Kachaike Formation differ from B. patagonicum described by Rombola et al (2022) only in the absence of traumatic resin canals.…”

“…Hirmeriellaceae were globally distributed during the Jurassic-Cretaceous, occupying a wide and heterogeneous range of environments (Alvin et al, 1981;Alvin, 1982;Watson, 1988;Greppi et al, 2021). In Argentina, Brachyoxylon has been reported for central and southern Patagonia during the Lower Jurassic-Upper Cretaceous (Bodnar et al, 2013;Vera & Césari, 2015;Passalia et al, 2016;Vera et al, 2019a;Greppi et al, 2020Greppi et al, , 2021Greppi et al, , 2022Rombola et al, 2022). Vera et al (2019a) One specimen (MPM PB 18269) was assigned to Brachyoxylon aff.…”

Soft-Tissue, Rare Earth Element, and Molecular Analyses of Dreadnoughtus schrani, an Exceptionally Complete Titanosaur from Argentina

“…Lacovara et al [ 25 ] interpreted these deposits to represent a crevasse splay horizon deposited onto a fluvial floodplain, based on an abundance of large-scale (primary), convoluted bedforms interpreted to have formed either (1) via liquefaction during rapid deposition, or (2) by sediment redistribution around the large, heavy skeletal remains of the Dreadnoughtus holotype at the time of burial, as it subsided into a thick, “soft” substrate. Abundant silicified wood [ 41 ] and palynomorphs [ 42 ] in strata of the Cerro Fortaleza Formation demonstrate that fluvial floodplains across the region hosted diverse forests.…”