{"title":"Conifer fossil woods from the Upper Cretaceous (Neuquén Group) of Mendoza Province, Argentina","authors":"","doi":"10.1016/j.geobios.2024.05.001","DOIUrl":null,"url":null,"abstract":"<div><p>An assemblage of four silicified woods from the Neuquén Group (Upper Cretaceous) collected in the Cara Cura Mountain Range, southwest of Mendoza Province, Argentina is described. The specimens are composed of secondary xylem, and the preservation varies among them. Two specimens were assigned to <em>Agathoxylon antarcticum</em> (Poole et Cantrill) Pujana et al., related to Araucariaceae. This fossil-species is characterized by its distinct growth ring boundaries, uni- to biseriate araucarian pitting on tracheid radial walls, and araucarioid cross-fields. Other specimens could not be assigned to a fossil-genus because of their poor preservation, but they show a conifer anatomy. The distinct growth ring boundaries of some specimens suggest annual seasonality. Additionally, the presence of small globose structures in areas of highly degraded secondary xylem is consistent with the erosion bacteria type observed in modern and fossil woods.</p></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geobios","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0016699524000408","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
An assemblage of four silicified woods from the Neuquén Group (Upper Cretaceous) collected in the Cara Cura Mountain Range, southwest of Mendoza Province, Argentina is described. The specimens are composed of secondary xylem, and the preservation varies among them. Two specimens were assigned to Agathoxylon antarcticum (Poole et Cantrill) Pujana et al., related to Araucariaceae. This fossil-species is characterized by its distinct growth ring boundaries, uni- to biseriate araucarian pitting on tracheid radial walls, and araucarioid cross-fields. Other specimens could not be assigned to a fossil-genus because of their poor preservation, but they show a conifer anatomy. The distinct growth ring boundaries of some specimens suggest annual seasonality. Additionally, the presence of small globose structures in areas of highly degraded secondary xylem is consistent with the erosion bacteria type observed in modern and fossil woods.
期刊介绍：
Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils.
Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.
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