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dc.contributor.author
Bodnar, Josefina
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dc.contributor.author
Escapa, Ignacio Hernán
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dc.date.available
2018-08-09T19:56:27Z
dc.date.issued
2016-11
dc.identifier.citation
Bodnar, Josefina; Escapa, Ignacio Hernán; Towards a whole plant reconstruction for Austrohamia (Cupressaceae): New fossil wood from the Lower Jurassic of Argentina; Elsevier Science; Review of Palaeobotany and Palynology; 234; 11-2016; 186-197
dc.identifier.issn
0034-6667
dc.identifier.uri
http://hdl.handle.net/11336/54863
dc.description.abstract
Early diversification of modern conifer lineages occurred during the Late Triassic and Early Jurassic, and worldwide ecosystems were dominated by conifers throughout the Jurassic. The knowledge about the palaeobiology and palaeoecology of basal representatives of those clades, however, has only recently begun to be developed due to the relative scarcity of complete plant reconstructions for many of these conifer families. In regards to the Cupressaceae sensu lato, some reconstructions have been proposed, although none has linked all plant organs. One of the oldest records of this family is the genus Austrohamia, described from the Lower Jurassic of Argentina and China. The original material consists of impressions of leafy branches, organically attached to ovulate and pollen cones. This conifer has a combination of characters that support its assignation to the Cunninghamioideae subfamily, the most basal member of the Cupressaceae stem group. In this paper, we describe permineralized woods from the same strata where Austrohamia minuta was found in the Cañadón Asfalto Basin, Chubut Province, Argentina. The fossil woods were assigned to the genus Protaxodioxylon, due to homoxylic pycnoxylic secondary xylem, with distinct growth rings, radial tracheid pitting of mixed type, abundant axial parenchyma, taxodioid cross-fields and uniseriate homocellular rays. Consistent with the differences in other Protaxodioxylon species, we propose a new specific taxon for the Patagonian specimens. This genus has often been related to the taxodiaceous Cupressaceae. This linkage, together with the fact that all the conifer impressions from these strata correspond to Austrohamia, reinforces the idea that the wood belongs to the same biological entity as A. minuta. From this interpretation, Austrohamia represents the most complete Mesozoic Cupressaceae to date.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Conifers
dc.subject
Fossil Wood
dc.subject
Mesozoic
dc.subject
Whole-Plant Reconstruction
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Towards a whole plant reconstruction for Austrohamia (Cupressaceae): New fossil wood from the Lower Jurassic of Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-09T15:17:27Z
dc.journal.volume
234
dc.journal.pagination
186-197
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Bodnar, Josefina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Escapa, Ignacio Hernán. Museo Paleontológico Egidio Feruglio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Review of Palaeobotany and Palynology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.revpalbo.2016.09.005
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0034666716300586
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