A new cupressaceous wood from the Lower Cretaceous of central Patagonia reveals possible clonal growth habit

A new genus and species, Austrocupressinoxylon barcinense, based on remains of cupressaceous wood is described for the Lower Cretaceous of central Patagonia, Argentina. The studied specimens are silicified fragments of picnoxylic and homoxylic wood that exhibit a combination of characters not previo...

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Autores principales: Nunes, Cristina I., Bodnar, Josefina, Escapa, Ignacio H., Gandolfo, Maria A., Cúneo, N. Rubén
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2019
Materias:
Paleontología
Cupressaceae
Early Cretaceous
Fossil woods
Root suckering
Clonal growth
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128613
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128613
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Cupressaceae
Early Cretaceous
Fossil woods
Root suckering
Clonal growth
spellingShingle Paleontología
Cupressaceae
Early Cretaceous
Fossil woods
Root suckering
Clonal growth
Nunes, Cristina I.
Bodnar, Josefina
Escapa, Ignacio H.
Gandolfo, Maria A.
Cúneo, N. Rubén
A new cupressaceous wood from the Lower Cretaceous of central Patagonia reveals possible clonal growth habit
topic_facet Paleontología
Cupressaceae
Early Cretaceous
Fossil woods
Root suckering
Clonal growth
description A new genus and species, Austrocupressinoxylon barcinense, based on remains of cupressaceous wood is described for the Lower Cretaceous of central Patagonia, Argentina. The studied specimens are silicified fragments of picnoxylic and homoxylic wood that exhibit a combination of characters not previously reported, therefore a new genus is erected. The characters are: 1- growth ring boundaries distinct, 2- transition from earlywood to latewood gradual, 3- axial parenchyma diffuse,4- radial tracheid pitting predominantly abietinean,5- cross-field pitting cupressoid, arranged in both cupressoid and araucarioid patterns, 6- rays uniseriate heterocellular, 7- end and horizontal walls of ray parenchyma cells smooth or slightly nodular, and 8- ray tracheids with smooth walls. The cross-field pitting patterns and the presence of ray tracheids are two traits of particular interest in the context of systematic affinities. The fragments were collected from two stumps found in life position attached to each other by a main root, consequently, the disposition of the stumps suggests a case of clonal growth by root suckering. This is the second report of such mechanisms in the fossil records worldwide and the first one for South America.
format Articulo
Preprint
author Nunes, Cristina I.
Bodnar, Josefina
Escapa, Ignacio H.
Gandolfo, Maria A.
Cúneo, N. Rubén
author_facet Nunes, Cristina I.
Bodnar, Josefina
Escapa, Ignacio H.
Gandolfo, Maria A.
Cúneo, N. Rubén
author_sort Nunes, Cristina I.
title A new cupressaceous wood from the Lower Cretaceous of central Patagonia reveals possible clonal growth habit
title_short A new cupressaceous wood from the Lower Cretaceous of central Patagonia reveals possible clonal growth habit
title_full A new cupressaceous wood from the Lower Cretaceous of central Patagonia reveals possible clonal growth habit
title_fullStr A new cupressaceous wood from the Lower Cretaceous of central Patagonia reveals possible clonal growth habit
title_full_unstemmed A new cupressaceous wood from the Lower Cretaceous of central Patagonia reveals possible clonal growth habit
title_sort new cupressaceous wood from the lower cretaceous of central patagonia reveals possible clonal growth habit
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/128613
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