<i>Astroniumxylon</i>, <i>Schinopsixylon</i>, and <i>Parametopioxylon</i> n. gen. fossil woods from upper Cenozoic of Argentina: taxonomic revision, new taxon and new records

This paper presents new descriptions of Anacardiaceae fossil woods from the Ituzaingo Formation (late Cenozoic) at the Toma Vieja, Curtiembre, and Arroyo El Espinillo localities, Argentina. We describe eight silicified woods assigned to four different species in three genera, one of which, Parametop...

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Detalles Bibliográficos
Autores principales: Franco, M. Jimena, Moya, Eliana, Brea, Mariana, Martínez Martínez, Camila
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126458
Aporte de:
id I19-R120-10915-126458
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Paleontology
Geography
Schinopsis balansae
Metopium
Anacardiaceae
Vieja
Astronium balansae
Botany
Taxon
Cenozoic
spellingShingle Ciencias Naturales
Paleontology
Geography
Schinopsis balansae
Metopium
Anacardiaceae
Vieja
Astronium balansae
Botany
Taxon
Cenozoic
Franco, M. Jimena
Moya, Eliana
Brea, Mariana
Martínez Martínez, Camila
<i>Astroniumxylon</i>, <i>Schinopsixylon</i>, and <i>Parametopioxylon</i> n. gen. fossil woods from upper Cenozoic of Argentina: taxonomic revision, new taxon and new records
topic_facet Ciencias Naturales
Paleontology
Geography
Schinopsis balansae
Metopium
Anacardiaceae
Vieja
Astronium balansae
Botany
Taxon
Cenozoic
description This paper presents new descriptions of Anacardiaceae fossil woods from the Ituzaingo Formation (late Cenozoic) at the Toma Vieja, Curtiembre, and Arroyo El Espinillo localities, Argentina. We describe eight silicified woods assigned to four different species in three genera, one of which, Parametopioxylon crystalliferum n. gen. n. sp., is new. Similarities between these three genera and the six Anacardiaceae species previously recorded from the late Cenozoic in northeastern Argentina are investigated using multivariate analysis techniques (correspondence and cluster analysis). Our study is based on 33 characters scored for 17 fossil specimens (10 Astroniumxylon Brea, Acenolaza, and Zucol 2001; five Schinopsixylon Lutz, 1979; and two Parametopioxylon n. gen.) and four extant species ( Astronium balansae Engl., Astronium urundeuva Engl., Schinopsis balansae Engl., and Metopium sp.). Our main goal is to determine the wood anatomical features useful for distinguishing among these species. Results of the multivariate analyses support the previous classification where Schinopsixylon is distinguished from Astroniumxylon by having exclusively paratracheal axial parenchyma, ≥30% multiseriate rays, and multiseriate rays that are ≥5 cells wide and commonly 301–400 μm in height. Additionally, we propose that Schinopsixylon heckii Lutz, 1979 is synonymous with S . herbstii Lutz, 1979. A diagnostic key for the fossil species studied is given. Wood anatomy of Anacardiaceae fossil woods from Argentina (late Cenozoic) suggests a warm, dry to semi-humid climate for this region, supporting previous studies.
format Articulo
Articulo
author Franco, M. Jimena
Moya, Eliana
Brea, Mariana
Martínez Martínez, Camila
author_facet Franco, M. Jimena
Moya, Eliana
Brea, Mariana
Martínez Martínez, Camila
author_sort Franco, M. Jimena
title <i>Astroniumxylon</i>, <i>Schinopsixylon</i>, and <i>Parametopioxylon</i> n. gen. fossil woods from upper Cenozoic of Argentina: taxonomic revision, new taxon and new records
title_short <i>Astroniumxylon</i>, <i>Schinopsixylon</i>, and <i>Parametopioxylon</i> n. gen. fossil woods from upper Cenozoic of Argentina: taxonomic revision, new taxon and new records
title_full <i>Astroniumxylon</i>, <i>Schinopsixylon</i>, and <i>Parametopioxylon</i> n. gen. fossil woods from upper Cenozoic of Argentina: taxonomic revision, new taxon and new records
title_fullStr <i>Astroniumxylon</i>, <i>Schinopsixylon</i>, and <i>Parametopioxylon</i> n. gen. fossil woods from upper Cenozoic of Argentina: taxonomic revision, new taxon and new records
title_full_unstemmed <i>Astroniumxylon</i>, <i>Schinopsixylon</i>, and <i>Parametopioxylon</i> n. gen. fossil woods from upper Cenozoic of Argentina: taxonomic revision, new taxon and new records
title_sort <i>astroniumxylon</i>, <i>schinopsixylon</i>, and <i>parametopioxylon</i> n. gen. fossil woods from upper cenozoic of argentina: taxonomic revision, new taxon and new records
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/126458
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