{"title":"阿根廷门多萨省上白垩世（内乌肯组）的针叶树化石林","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":"{\"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}","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
摘要
本文描述了在阿根廷门多萨省西南部卡拉库拉山脉采集到的内乌肯组（上白垩世）四种硅化木的组合。这些标本由次生木质部组成，保存状况各不相同。其中两个标本被归类为 Agathoxylon antarcticum (Poole et Cantrill) Pujana 等人，与 Araucariaceae 有关。该化石物种的特点是生长环边界明显，气管放射壁上有单侧至双侧的红叶点蚀，以及红叶横斑。其他标本由于保存较差，无法归入化石属，但它们显示了针叶树的解剖结构。一些标本的生长环边界明显，这表明每年都有季节性。此外，在高度退化的次生木质部区域出现的小球状结构与在现代和化石木材中观察到的侵蚀细菌类型一致。
Conifer fossil woods from the Upper Cretaceous (Neuquén Group) of Mendoza Province, Argentina
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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