The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens
The Devonian herbaceous lycophyte genus Haskinsia Grierson and Banks is characterized by narrow dichotomizing stems and helically arranged petiolate leaves with a broad, approximately deltoid, lamina. New specimens are reported from four horizons in the Lower Member of the Campo Chico Formation, Sie...
Published in: | Botanical Journal of the Linnean Society |
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Linnean Society of London
1996
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:10071 2023-05-15T13:39:53+02:00 The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens Berry, Christopher Mark Edwards, Dianne 1996-10 https://orca.cardiff.ac.uk/id/eprint/10071/ https://doi.org/10.1111/j.1095-8339.1996.tb02067.x unknown Linnean Society of London Berry, Christopher Mark https://orca.cardiff.ac.uk/view/cardiffauthors/A072074J.html orcid:0000-0001-9521-5618 orcid:0000-0001-9521-5618 and Edwards, Dianne https://orca.cardiff.ac.uk/view/cardiffauthors/A033367T.html orcid:0000-0002-9786-4395 orcid:0000-0002-9786-4395 1996. The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens. Botanical Journal of the Linnean Society 122 (2) , pp. 103-122. 10.1111/j.1095-8339.1996.tb02067.x https://doi.org/10.1111/j.1095-8339.1996.tb02067.x doi:10.1111/j.1095-8339.1996.tb02067.x QE Geology Article PeerReviewed 1996 ftunivcardiff https://doi.org/10.1111/j.1095-8339.1996.tb02067.x 2022-10-20T22:34:13Z The Devonian herbaceous lycophyte genus Haskinsia Grierson and Banks is characterized by narrow dichotomizing stems and helically arranged petiolate leaves with a broad, approximately deltoid, lamina. New specimens are reported from four horizons in the Lower Member of the Campo Chico Formation, Sierra de Perijá, western Venezuela. H. sagittaka Edwards and Benedetto has sagittate leaves, and fertile specimens are reported for the first time; the ellipsoidal/obovoid adaxially-flattened sporangium is attached to unmodified leaves towards the top of the petiole in the adaxial position. H. sp. has sagittate leaves which are larger than any yet attributed to the genus but is represented by only three specimens. H. hastata sp. nov. has hastate leaves; the sporangia are more globose but positioned similarly to those of H. sagittata. The occurrence of the sporangia on unmodified microphylls indicates that Haskinsia is a member of Protolepidodendrales. The status of Haskinsiaceae is discussed. The Venezuelan specimens are compared with other records of Haskimi and Haskinsia-like plants from North America, Kazakhstan, North China, North Africa and Antarctica. Article in Journal/Newspaper Antarc* Antarctica Cardiff University: ORCA (Online Research @ Cardiff) Botanical Journal of the Linnean Society 122 2 103 122 |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Berry, Christopher Mark Edwards, Dianne The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens |
topic_facet |
QE Geology |
description |
The Devonian herbaceous lycophyte genus Haskinsia Grierson and Banks is characterized by narrow dichotomizing stems and helically arranged petiolate leaves with a broad, approximately deltoid, lamina. New specimens are reported from four horizons in the Lower Member of the Campo Chico Formation, Sierra de Perijá, western Venezuela. H. sagittaka Edwards and Benedetto has sagittate leaves, and fertile specimens are reported for the first time; the ellipsoidal/obovoid adaxially-flattened sporangium is attached to unmodified leaves towards the top of the petiole in the adaxial position. H. sp. has sagittate leaves which are larger than any yet attributed to the genus but is represented by only three specimens. H. hastata sp. nov. has hastate leaves; the sporangia are more globose but positioned similarly to those of H. sagittata. The occurrence of the sporangia on unmodified microphylls indicates that Haskinsia is a member of Protolepidodendrales. The status of Haskinsiaceae is discussed. The Venezuelan specimens are compared with other records of Haskimi and Haskinsia-like plants from North America, Kazakhstan, North China, North Africa and Antarctica. |
format |
Article in Journal/Newspaper |
author |
Berry, Christopher Mark Edwards, Dianne |
author_facet |
Berry, Christopher Mark Edwards, Dianne |
author_sort |
Berry, Christopher Mark |
title |
The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens |
title_short |
The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens |
title_full |
The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens |
title_fullStr |
The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens |
title_full_unstemmed |
The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens |
title_sort |
herbaceous lycophyte haskinsia grierson and banks from the devonian of western venezuela, with observations on leaf morphology and fertile specimens |
publisher |
Linnean Society of London |
publishDate |
1996 |
url |
https://orca.cardiff.ac.uk/id/eprint/10071/ https://doi.org/10.1111/j.1095-8339.1996.tb02067.x |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Berry, Christopher Mark https://orca.cardiff.ac.uk/view/cardiffauthors/A072074J.html orcid:0000-0001-9521-5618 orcid:0000-0001-9521-5618 and Edwards, Dianne https://orca.cardiff.ac.uk/view/cardiffauthors/A033367T.html orcid:0000-0002-9786-4395 orcid:0000-0002-9786-4395 1996. The herbaceous lycophyte Haskinsia Grierson and Banks from the Devonian of western Venezuela, with observations on leaf morphology and fertile specimens. Botanical Journal of the Linnean Society 122 (2) , pp. 103-122. 10.1111/j.1095-8339.1996.tb02067.x https://doi.org/10.1111/j.1095-8339.1996.tb02067.x doi:10.1111/j.1095-8339.1996.tb02067.x |
op_doi |
https://doi.org/10.1111/j.1095-8339.1996.tb02067.x |
container_title |
Botanical Journal of the Linnean Society |
container_volume |
122 |
container_issue |
2 |
container_start_page |
103 |
op_container_end_page |
122 |
_version_ |
1766125822625710080 |