FOSSIL CONIFER WOODS FROM CERRO PICHE GRABEN (TRIASSIC-JURASSIC?) NORTH PATAGONIAN MASSIF, RÍO NEGRO PROVINCE, ARGENTINA

Authors

  • Josefina Bodnar División Paleobotánica, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata. Paseo del Bosque s/n, B1900FWA La Plata, Buenos Aires, Argentina
  • Juan Ignacio Falco Instituto Geológico del Sur (INGEOSUR) (CONICET-UNS), Departamento de Geología, Universidad Nacional del Sur. San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina

Keywords:

Paleobotany, Mesozoic, Cupressaceae, Los Menucos, Argentina

Abstract

Fossil conifer woods are described for the first time in sedimentary rocks from Cerro Piche Graben, North Patagonian Massif, Argentina. The permineralized axes are chacaracterized by a pith constituted by parenchyma cells and a few sclerenchyma cells; secondary xylem homoxylic and pycnoxylic, without distinct growth rings; tracheid pits uniseriate and mainly spaced; cross fields cupressoid, with 3 to 8 pits; and rays homocellular, uniseriate and low. Based on these characteristics, the woods are assigned to Cupressinoxylon. Until now, the only fossil plants known from Cerro Piche were two specimens of Pleuromeia sp., which are reinterpreted also as conifer fossil remains.

Author Biography

  • Josefina Bodnar, División Paleobotánica, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata. Paseo del Bosque s/n, B1900FWA La Plata, Buenos Aires, Argentina
    Doctora en Ciencias Naturales, Orientacion Paleontologia, en la UNLP. Investigadora en la Division Paleobotanica, Museo de La Plata

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Published

2018-07-26

Issue

Vol. 55 No. 3 (2018)

Section

Paleontological Notes

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How to Cite

FOSSIL CONIFER WOODS FROM CERRO PICHE GRABEN (TRIASSIC-JURASSIC?) NORTH PATAGONIAN MASSIF, RÍO NEGRO PROVINCE, ARGENTINA. (2018). Ameghiniana, 55(3), 356–362. https://ameghiniana.org.ar/index.php/ameghiniana/article/view/3158