Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina)

Fossil plants are described from the upper part of the Devonian Lolén Formation, Sierra de la Ventana, Buenos Aires Province, Argentina, in the area of Estancia Las Acacias. The sequence is composed mainly of dark grey shales, and fossils were found in a single horizon where thin inter-layered beds...

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Detalles Bibliográficos
Autor principal: Tomezzoli, Renata Nela
Publicado: 2002
Materias:
Argentina
Devonian
Gondwana
Haskinsia
Lycopsida
leaf morphology
paleobiogeography
paleobotany
paleoecology
paleolatitude
Haplostigma
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v139_n6_p641_Cingolani
http://hdl.handle.net/20.500.12110/paper_00167568_v139_n6_p641_Cingolani
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00167568_v139_n6_p641_Cingolani
record_format dspace
spelling paper:paper_00167568_v139_n6_p641_Cingolani2023-06-08T14:38:49Z Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina) Tomezzoli, Renata Nela Argentina Devonian Gondwana Haskinsia Lycopsida Devonian Gondwana leaf morphology paleobiogeography paleobotany paleoecology paleolatitude Argentina Haplostigma Haskinsia Lycopsida Fossil plants are described from the upper part of the Devonian Lolén Formation, Sierra de la Ventana, Buenos Aires Province, Argentina, in the area of Estancia Las Acacias. The sequence is composed mainly of dark grey shales, and fossils were found in a single horizon where thin inter-layered beds of fine reddish-brown micaceous sandstones appear where the environment of marine deposition became more shallow. The age of the Lolén Formation is presently established on the basis of brachiopods, these being characteristic elements of the Malvinokaffric realm from the Gondwana Lower Devonian (Emsian). The fossil plants are remarkably preserved given that they are in rocks that have undergone intense deformation. The plants are identified as Haplostigma sp. and Haskinsia cf. H. colophylla, and suggest a Middle Devonian age (Givetian) for the fossil-bearing levels. Haskinsia, identified on the basis of leaf morphology, is the first well-delimited Middle Devonian lycopsid genus described from Argentina, and the record from the most southerly palaeolatitude. During the Middle Devonian, Haskinsia was distributed in tropical, warm temperate and high southern latitude, ?cool temperate zones. Fil:Tomezzoli, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v139_n6_p641_Cingolani http://hdl.handle.net/20.500.12110/paper_00167568_v139_n6_p641_Cingolani
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
Devonian
Gondwana
Haskinsia
Lycopsida
Devonian
Gondwana
leaf morphology
paleobiogeography
paleobotany
paleoecology
paleolatitude
Argentina
Haplostigma
Haskinsia
Lycopsida
spellingShingle Argentina
Devonian
Gondwana
Haskinsia
Lycopsida
Devonian
Gondwana
leaf morphology
paleobiogeography
paleobotany
paleoecology
paleolatitude
Argentina
Haplostigma
Haskinsia
Lycopsida
Tomezzoli, Renata Nela
Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina)
topic_facet Argentina
Devonian
Gondwana
Haskinsia
Lycopsida
Devonian
Gondwana
leaf morphology
paleobiogeography
paleobotany
paleoecology
paleolatitude
Argentina
Haplostigma
Haskinsia
Lycopsida
description Fossil plants are described from the upper part of the Devonian Lolén Formation, Sierra de la Ventana, Buenos Aires Province, Argentina, in the area of Estancia Las Acacias. The sequence is composed mainly of dark grey shales, and fossils were found in a single horizon where thin inter-layered beds of fine reddish-brown micaceous sandstones appear where the environment of marine deposition became more shallow. The age of the Lolén Formation is presently established on the basis of brachiopods, these being characteristic elements of the Malvinokaffric realm from the Gondwana Lower Devonian (Emsian). The fossil plants are remarkably preserved given that they are in rocks that have undergone intense deformation. The plants are identified as Haplostigma sp. and Haskinsia cf. H. colophylla, and suggest a Middle Devonian age (Givetian) for the fossil-bearing levels. Haskinsia, identified on the basis of leaf morphology, is the first well-delimited Middle Devonian lycopsid genus described from Argentina, and the record from the most southerly palaeolatitude. During the Middle Devonian, Haskinsia was distributed in tropical, warm temperate and high southern latitude, ?cool temperate zones.
author Tomezzoli, Renata Nela
author_facet Tomezzoli, Renata Nela
author_sort Tomezzoli, Renata Nela
title Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina)
title_short Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina)
title_full Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina)
title_fullStr Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina)
title_full_unstemmed Middle Devonian lycopsids from high southern palaeolatitudes of Gondwana (Argentina)
title_sort middle devonian lycopsids from high southern palaeolatitudes of gondwana (argentina)
publishDate 2002
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v139_n6_p641_Cingolani
http://hdl.handle.net/20.500.12110/paper_00167568_v139_n6_p641_Cingolani
work_keys_str_mv AT tomezzolirenatanela middledevonianlycopsidsfromhighsouthernpalaeolatitudesofgondwanaargentina
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