SciELO - Scientific Electronic Library Online

 
vol.44 issue3Palynology of the Chigua (Devonian) and Malimán (Carboniferous) formations in the Volcán Range, San Juan Province, Argentina: Part II. Cavate, pseudosaccate and cingulizonate spores author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

  • Have no similar articlesSimilars in SciELO

Share


Ameghiniana

On-line version ISSN 1851-8044

Abstract

PASSALIA, Mauro G.. New records of the cretaceous flora described by Halle (1913) from San Martín Lake, Santa Cruz, Argentina. Ameghiniana [online]. 2007, vol.44, n.3, pp.565-595. ISSN 1851-8044.

Two new sites with Cretaceous fossil plants, Bajo Comisión 1 and 2, have been studied. They are located north of San Martín Lake, Santa Cruz Province, Argentina, and their deposits belong to the Kachaike Formation (Late Albian - Cenomanian). This area was previously studied by Thor Halle who provided the description of a fossil plant assemblage. About twenty species have been recognized at the new sites, mostly belonging to pteridophytes, pteridosperms, conifers as well as morphogenera of uncertain botanical affinity. Bryophytes, bennettites, ginkgophytes and angiosperms are also present as subordinated components. Among them, new taxa are described: Pachypteris auriculata sp. nov., Brachyphyllum kachaikensis sp. nov. and Thorhallenia dentata gen. et sp. nov. In turn, two species, previously described by Halle, have been reassigned to other genera or species: Phyllopteroides cf. P. laevis Cantrill and Webb instead of Asplenites lanceolatus Halle, and Gleichenites juliensis Herbst instead of Gleichenites cf. G. micromerus Heer and Phyllopteroides cf. P. laevis Cantrill y Webb instead of Asplenites lanceolatus Halle. There is a considerable resemblance between Bajo Comisión 1 and 2 assemblages and the flora previously described by Halle, suggesting they belong to the same levels.

Keywords : Argentina; Santa Cruz; Kachaike Formation; Cretaceous; Pteridophytes; Gymnosperms; Angiosperms.

        · abstract in Spanish     · text in Spanish

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License