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Artículo

Equisetaleans from the Bajo de Veliz Formation (Gzhelian-Asselian): a new key in the evolution of Gondwanan reproductive structures

Fernández, Johana AntonellaIcon ; Cesari, Silvia NelidaIcon
Fecha de publicación: 29/06/2023
Editorial: Taylor & Francis
Revista: Historical Biology
ISSN: 0891-2963
e-ISSN: 1029-2381
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Paleontología

Resumen

Equisetaleans are a frequent floral element in the upper Palaeozoic of Gondwana and traditionally have been assigned to a few species of Phyllotheca based mainly on vegetative features. However, studies have suggested that the reproductive organs of Gondwanan equisetaleans may be more complex than previously thought, and new Gondwanan taxa have been reported during recent decades. The evolution of these plants is believed to have been driven by changes in their reproductive organs, including the emergence of simple sporangia or cruciate sporangiophores at the internodes as well as the development of strobilar structures. Here, we describe new records of Cruciatheca Cúneo et Escapa and Conustheca gen. nov. from Gzhelian-earliest Cisuralian deposits in the southeastern boundary of the Paganzo Basin, Argentina. The new species with whorls of strobilus-like structures provides further evidence of a diverse equisetalean flora across the southern continents. These records also suggest that the evolution of these equisetaleans was complex, with multiple lineages and distinct morphologies.
Palabras clave: equisetales , sporangiophore , strobilus , latest Pennsylvanian , Gondwana
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/252302
URL: https://www.tandfonline.com/doi/full/10.1080/08912963.2023.2228331
DOI: http://dx.doi.org/10.1080/08912963.2023.2228331
Colecciones
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Fernández, Johana Antonella; Cesari, Silvia Nelida; Equisetaleans from the Bajo de Veliz Formation (Gzhelian-Asselian): a new key in the evolution of Gondwanan reproductive structures; Taylor & Francis; Historical Biology; 36; 9; 29-6-2023; 1712-1726
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