Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton

A dwarf lycophyte from Devonian beds of the Rio Blanco Basin, Haplostigma furquei Frenguelli 1952, is described on the basis of the type specimens. They were found in beds belonging to the Chigua and Punilla Formations, of Middle-Late Devonian age. The stems have spirally disposed long, spine-like a...

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Autor principal: Gutiérrez, P.R.
Formato: JOUR
Materias:
Argentina
Biostratigraphy
Calingasta-Uspallata
Carboniferous
Devonian
Lycophyta
Paganzo and Malvinas basins
Río Blanco
Taxonomy
Haplostigma
lycophyte
Malanzania
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v33_n2_p127_Gutierrez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v33_n2_p127_Gutierrez
record_format dspace
spelling todo:paper_00027014_v33_n2_p127_Gutierrez2023-10-03T13:52:32Z Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton Gutiérrez, P.R. Argentina Biostratigraphy Calingasta-Uspallata Carboniferous Devonian Lycophyta Paganzo and Malvinas basins Río Blanco Taxonomy Carboniferous Devonian Haplostigma lycophyte Malanzania Argentina A dwarf lycophyte from Devonian beds of the Rio Blanco Basin, Haplostigma furquei Frenguelli 1952, is described on the basis of the type specimens. They were found in beds belonging to the Chigua and Punilla Formations, of Middle-Late Devonian age. The stems have spirally disposed long, spine-like appendages which lack vascularisation. Comparison is made with other taxa, and a brief discussion is presented on the genus Haplostigma. The stratigraphic ranges and regional distribution are reported for Malanzania nana Archangelsky, Azcuy & Wagner 1981 (Upper Carboniferous), M. antiqua Archangelsky 1983 (Middle Devonian) and Haplostigma furquei Frenguelli 1952 (Middle to Upper Devonian). Cf. Archaeosigillaria sp. A (="Asteroxylon sp." sensu Frenguelli 1951), Archaeosigillaria sp. B and Lycophyte ("Gen. et sp. indet.") of Devonian and lowermost Upper Carboniferous strata of the San Juan Precordillera are also described. The reference of Argentine material to the genera Haplostigma Seward and Cyclostigma Haughton is discussed. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v33_n2_p127_Gutierrez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Biostratigraphy
Calingasta-Uspallata
Carboniferous
Devonian
Lycophyta
Paganzo and Malvinas basins
Río Blanco
Taxonomy
Carboniferous
Devonian
Haplostigma
lycophyte
Malanzania
Argentina
spellingShingle Argentina
Biostratigraphy
Calingasta-Uspallata
Carboniferous
Devonian
Lycophyta
Paganzo and Malvinas basins
Río Blanco
Taxonomy
Carboniferous
Devonian
Haplostigma
lycophyte
Malanzania
Argentina
Gutiérrez, P.R.
Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton
topic_facet Argentina
Biostratigraphy
Calingasta-Uspallata
Carboniferous
Devonian
Lycophyta
Paganzo and Malvinas basins
Río Blanco
Taxonomy
Carboniferous
Devonian
Haplostigma
lycophyte
Malanzania
Argentina
description A dwarf lycophyte from Devonian beds of the Rio Blanco Basin, Haplostigma furquei Frenguelli 1952, is described on the basis of the type specimens. They were found in beds belonging to the Chigua and Punilla Formations, of Middle-Late Devonian age. The stems have spirally disposed long, spine-like appendages which lack vascularisation. Comparison is made with other taxa, and a brief discussion is presented on the genus Haplostigma. The stratigraphic ranges and regional distribution are reported for Malanzania nana Archangelsky, Azcuy & Wagner 1981 (Upper Carboniferous), M. antiqua Archangelsky 1983 (Middle Devonian) and Haplostigma furquei Frenguelli 1952 (Middle to Upper Devonian). Cf. Archaeosigillaria sp. A (="Asteroxylon sp." sensu Frenguelli 1951), Archaeosigillaria sp. B and Lycophyte ("Gen. et sp. indet.") of Devonian and lowermost Upper Carboniferous strata of the San Juan Precordillera are also described. The reference of Argentine material to the genera Haplostigma Seward and Cyclostigma Haughton is discussed.
format JOUR
author Gutiérrez, P.R.
author_facet Gutiérrez, P.R.
author_sort Gutiérrez, P.R.
title Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton
title_short Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton
title_full Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton
title_fullStr Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton
title_full_unstemmed Review of the palaeozoic lycophytes of Argentina. 2. Malanzania Archangelsky, Azcuy et Wagner and Haplostigma seward, with notes on Cyclostigma Haughton
title_sort review of the palaeozoic lycophytes of argentina. 2. malanzania archangelsky, azcuy et wagner and haplostigma seward, with notes on cyclostigma haughton
url http://hdl.handle.net/20.500.12110/paper_00027014_v33_n2_p127_Gutierrez
work_keys_str_mv AT gutierrezpr reviewofthepalaeozoiclycophytesofargentina2malanzaniaarchangelskyazcuyetwagnerandhaplostigmasewardwithnotesoncyclostigmahaughton
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