MENUCOA CAZAUI NOV. GEN. ET SP., TRONCO PETRIFICADO DE CYCADALES, PROVINCIA DE RIO NEGRO, ARGENTINA

Authors

  • Bruno Petriella

Abstract

A petrified trunk with an arrnour of leaf bases from the Lower Tertiary (?) of Los Menucos, Río Negro Province, Argentina, is described. The anatomy of Menueoa cazaui is the usual one found in living polyxylic cycad stems. Ccrnparisons have been made with Cycadeoidea, Bueklandia, Michelilloa and living Cycadales. Ir is concluded that: a) there is a close relationship between M. cazaui and the polyxylic genera of the living Cycadales; b) the presense of M. cazaui in the Lower Tertiary (?) of Argentina is a further argument which favours the existence of connections between the southern lands in the past; e) M. cazaui possibly existed in a ternperate to sub tropical region.

Downloads

Published

2013-08-13

Issue

Vol. 6 No. 4

Section

Articles

License

Authors publishing in Ameghiniana have the option of making their article freely available online. Authors opting for the Open Access must pay a fee of $300 (US dollars) to cover article-processing costs and to ensure the article is made open access. Please contact the Production Team after the acceptance of your manuscript if you are interested in making your article Open Access. This option implies by default a license Creative Commons Attribution Non-Commercial-NoDerivs License (CC BY NC ND). If your funding institution requires a different licensing option please communicate this to the Production Team after the acceptance of your manusctipt.

How to Cite

MENUCOA CAZAUI NOV. GEN. ET SP., TRONCO PETRIFICADO DE CYCADALES, PROVINCIA DE RIO NEGRO, ARGENTINA. (2013). Ameghiniana, 6(4), 291-302. https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/1288

Most read articles by the same author(s)

1 2 > >>