Growth architecture and silhouette of Jurassic conifers from La Matilde Formation, Patagonia, Argentina

International Journal of Plant Sciences

Cúneo

Rothwell

et al. 2013

Section: Introductionmentioning

confidence: 99%

Pararaucaria delfueyoi sp. nov. from the Late Jurassic Cañadón Calcáreo Formation, Chubut, Argentina: Insights into the Evolution of the Cheirolepidiaceae

International Journal of Plant Sciences

Cúneo

Rothwell

et al. 2013

“…patagonica has been recognized as being similar to, or has been assigned to, several conifer families including Araucariaceae (Wieland, 1929, 1935; Calder, 1953), Cheirolepidiaceae (Wieland, 1935; Archangelsky, 1968), Pinaceae (Smith and Stockey, 2001, 2002), Taxodiaceae (= basal Cupressaceae; Calder 1953; Stockey, 1977), and Voltziaceae (Miller, 1999). Some authors have suggested that Pararaucaria cones represent a distinct family of conifers (e.g., Stockey, 1977; Taylor et al, 2009; Falaschi et al, 2011) or have a structure that is intermediate between families, based on features of the ovuliferous scale, putative seed wing, cone vascularization, and histology.…”

mentioning

confidence: 99%

Seed cone anatomy of Cheirolepidiaceae (Coniferales): Reinterpreting Pararaucaria patagonica Wieland

Rothwell

Stockey

et al. 2012

American J of Botany

Pararaucaria patagonica is assigned to Cheirolepidiaceae, documenting anatomical features for seed cones of the family and providing evidence for the antiquity of pinoid conifers leading to the origin of Pinaceae. A list of key morphological and anatomical characters for seed cones of Cheirolepidiaceae is developed to facilitate assignment of a much broader range of fossil remains to the family. This confirms the presence of Cheirolepidiaceae in the Jurassic of the Southern Hemisphere, which was previously suspected from palynological records.

“…). However, a rhomboidal (scale‐like) morphology appears to be a more plausible basal leaf morphology when taking into account the oldest fossil record assigned to the genus or associated with it, as it is the case of several Brachyphyllum species (Kendall, ; Calder, ; Townrow, ; Harris, ; Gee and Tidwell, ; Falaschi et al., ; Sender et al., ). The reconstructed basal configuration for the crown group of the clade comprised by the species of section Eutacta would be thin‐winged cone scale complexes and single‐veined scale‐like leaves (Fig.…”

Section: Discussionmentioning

confidence: 99%

Araucaria lefipanensis(Araucariaceae), a new species with dimorphic leaves from the Late Cretaceous of Patagonia, Argentina

Andruchow‐Colombo

Cúneo

et al. 2018

American J of Botany

The leaf dimorphism of A. lefipanensis is similar to that of extant A. bidwillii, where dimorphism is considered to be related to seasonal growth. The leaf dimorphism in A. lefipanensis is consistent with the paleoclimatic and paleoenvironmental reconstructions previously suggested for the Lefipán Formation, which is thought to have been a seasonal subtropical forest. The new species shows evidence of mosaic evolution, with cone scale complexes morphologically similar to section Eutacta and leaves similar to the sections of the broad-leaved clade, constituting a possible transitional form between these two well-defined lineages. More complete plant concepts, especially those including both reproductive and vegetative remains are necessary to understand the evolution of ancient plant lineages. This work contributes to this aim by documenting a new species that may add to the understanding of the early evolution of the sections of Araucaria.