Fossil woods (Coniferales) from the Baqueró Group (Aptian), Santa Cruz Province, Argentina

Vera, Ezequiel Ignacio; Césari, Silvia N.

doi:10.1590/s0001-37652012005000047

Cited by 25 publications

(8 citation statements)

References 15 publications

(12 reference statements)

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“…There are many forms of Brachyoxylon described showing a large spread of this Mesozoic genus on the planet and we have quoted and discussed, in detail, some of them (in Iamandei et al, 2018). They were described from Japan (Iijima et al, 1989), from Mexico (Cevallos-Ferriz, 1992), from USA (Hickey et al, 2011), from Argentina (Vera and Césari, 2012;Bodnar et al, 2013), all of them having various specific xylotomical details, partially similar to our material. But the European species Brachyoxylon saurinii described by Boureau and Serra (1961), B. avramii and B. dobrogiacum described by Iamandei and Iamandei (2005), B. serrae described by Phillipe et al (2011) and, especially B. holbavicum, described by us from the same area (Iamandei et al, 2018) are closer to our studied specimens.…”

Section: Affinities and Discussionsupporting

confidence: 64%

CONTRIBUTIONS TO THE STUDY OF THE EARLY JURASSIC PETRIFIED FOREST OF HOLBAV AND CRISTIAN AREAS (BRAȘOV REGION, SOUTH CARPATHIANS, ROMANIA), 2nd PART

Iamandei¹,

Iamandei²,

Grădinaru³

2021

Actapalrom

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The present paper represents the second part of the palaeoxylotomical study on the “Grădinaru Collection” that is housed by the National Museum of Geology, Bucharest. By the study of a new material collected from the Getic domain of the South Carpathians, Romania, the following taxa were identified and discussed in detail: Protocupressinoxylon dragastanii, Protojuniperoxylon holbavicum (sp. nov.), Brachyoxylon holbavicum, B. cristianicum, Palaeoginkgoxylon sp., Bucklandia sp. A, and Bucklandia sp. B. All the studied specimens suggest to a tropical Early Jurassic petrified forest. Thus, the new data have not only palaeobotanical importance, but they also contribute to the palaeobiogeographic, palaeoecologic and palaeoclimatologic knowledge of the Mesophytic

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Section: Affinities and Discussionsupporting

confidence: 64%

CONTRIBUTIONS TO THE STUDY OF THE EARLY JURASSIC PETRIFIED FOREST OF HOLBAV AND CRISTIAN AREAS (BRAȘOV REGION, SOUTH CARPATHIANS, ROMANIA), 2nd PART

Iamandei¹,

Iamandei²,

Grădinaru³

2021

Actapalrom

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“…Previous records of Brachyoxylon in Argentina are from the Early Jurassic Roca Blanca Formation and the Early Cretaceous Anfiteatro de Ticó Formation in Santa Cruz Province, southern Patagonia (Gnaedinger et al, 2009;Vera and Césari, 2012). The first is represented by a fossil wood not identified at the species-level, characterized by the presence of mixed type of radial tracheid pitting, with equally frequent uniseriate and biseriate pits, araucarioid cross-fields with eight cupressoid pits, uniseriate rays, and axial parenchyma (S.G. pers.…”

Section: Taxonomic Assignment and Comparisonsmentioning

confidence: 99%

First Record of Conifer Wood from the Cañadón Asfalto Formation (Early-Middle Jurassic), Chubut Province, Argentina

et al. 2013

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Abstract.A new fossil conifer wood -Brachyoxylon currumilii sp. nov.-is described from the Lower-Middle Jurassic of Chubut Province (Argentina). The specimens were collected at a locality where the Cañadón Asfalto Formation is exposed, in the vicinity of the Cerro Cóndor village. The studied wood is characterized by mixed pitting in radial tracheid walls (predominantly uniseriate), araucarioid cross fields, low uniseriate rays and the absence of resin canals. The use of transmitted light and epifluorescence microscopy together with SEM imaging allowed the identification of additional characters such as the presence of pitting with torus-margo and compression wood. These characters are discussed in terms of their systematic relevance. On these grounds, the systematic affinity of the studied wood is discussed and linked to the extinct conifer family Cheirolepidiaceae, one of the dominant plant groups during the Jurassic and Cretaceous in Patagonia.Keywords. Fossil wood. Mesozoic. Patagonia. Brachyoxylon. Cheirolepidiaceae. Resumen. PRIMER REGISTRO DE LEÑO DE CONIFERA DE LA FORMACIÓN CAÑADÓN ASFALTO (JURÁSICO TEMPRA-NO-MEDIO), PROVINCIA DE CHUBUT, ARGENTINA. Se describe una nueva especie de madera fósil de conífera, Brachyoxylon currumilii sp. nov., del Jurásico Inferior a Medio de la provincia de Chubut, Argentina. Los especímenes estudiados fueron coleccionados en una localidad donde aflora la Formación Cañadón Asfalto, en las cercanías de la aldea de Cerro Cóndor. Los troncos, estudiados, se caracterizan por el punteado radial de las traqueidas de tipo mixto, predominantemente uniseriado, campos de cruzamiento de tipo araucarioide, radios uniseriados bajos y ausencia de canales resiníferos. La observación bajo MEB y microscopio con luz transmitida y epifluorescencia permitió además la identificación de caracteres tales como la presencia de torus-margo en las punteaduras y estructuras de leño de compresión. Ambos caracteres son discutidos en relación a su relevancia sistemática. Sobre esta base, se discute la afinidad sistemática de la madera estudiada, la cual posee rasgos que la vincularían con la familia de coníferas extintas Cheirolepidiaceae, uno de los grupos de plantas dominantes durante el Jurásico y Cretácico de Patagonia.Palabras clave. Madera fósil. Mesozoico. Patagonia. Brachyoxylon. Cheirolepidiaceae.

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“…Differences with Agathoxylon sp. include higher rays and larger number of pits per cross-field (Vera & Césari 2012). Araucarioxylon kellerense is distinct from Agathoxylon gilii in the number of pits per cross-field, the presence of triseriate bordered pits, presence of vertically spaced bordered pits on tracheid radial walls and having bordered pits on the tangential tracheid walls (Nishida et al 1990(Nishida et al , 1992.…”

Section: Comparisons With Fossil Taxamentioning

confidence: 99%

Upper Jurassic, Upper Cretaceous and Palaeocene conifer woods from Mexico

Ríos-Santos

Cevallos-Ferriz

2017

Earth and Environmental Science Transactions of the Royal Socie

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Although there are reports of permineralised woods in Mesozoic and Cenozoic strata in Mexico, there are few palaeobotanical studies based on coniferous stems. Four taxa of fossil wood from three localities in Mexico are described at the anatomical level and identified taxonomically based on detailed comparisons with woods of extant and fossil taxa. Agathoxylon gilii sp. nov. and A. jericonse sp. nov. are determined from the Todos Santos Formation (Upper Jurassic), in Chiapas; A. parrensis sp. nov. is described from the Las Encinas Formation (Palaeocene) in Coahuila; and Taxodioxylon cabullensis sp. nov. corresponds with material from the Packard Shale Formation in Sonora. Dominance of Araucariaceae and Cupressaceae in this region during the Mesozoic and early Cenozoic is further supported by leaf records, but these materials may also represent other taxa, like Cheirolepidaceae, which may have araucarioid secondary xylem. Records of Brachyphyllum and/or Pagiophyllum, which may represent araucarioid or cheirolepidaceous taxa, and different cupressaceous leaves, have been collected in rocks of the same period in nearby formations. At present, the amalgamation of isolated organs to form one plant is uncertain and, thus, there is an open challenge to reconstruct the plants and better understand these extinct communities. The new fossil taxa will add to the diversity of extinct plants and conifer communities during the Mesozoic and early Cenozoic in low-latitude North America.

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Fossil woods (Coniferales) from the Baqueró Group (Aptian), Santa Cruz Province, Argentina

Cited by 25 publications

References 15 publications

CONTRIBUTIONS TO THE STUDY OF THE EARLY JURASSIC PETRIFIED FOREST OF HOLBAV AND CRISTIAN AREAS (BRAȘOV REGION, SOUTH CARPATHIANS, ROMANIA), 2nd PART

CONTRIBUTIONS TO THE STUDY OF THE EARLY JURASSIC PETRIFIED FOREST OF HOLBAV AND CRISTIAN AREAS (BRAȘOV REGION, SOUTH CARPATHIANS, ROMANIA), 2nd PART

First Record of Conifer Wood from the Cañadón Asfalto Formation (Early-Middle Jurassic), Chubut Province, Argentina

Upper Jurassic, Upper Cretaceous and Palaeocene conifer woods from Mexico

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