Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’
ABSTRACT New cranial material of the ‘rhynchodipterid’ lungfish Soederberghia groenlandica from Upper Devonian (Famennian) strata in East Greenland is described. Previously unknown structures identified here include components of the hyoid arch (ceratohyal, hypohyal) and the lower jaw (prearticular,...
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Online Access: | http://dx.doi.org/10.1017/s175569100700607x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S175569100700607X |
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crcambridgeupr:10.1017/s175569100700607x 2023-05-15T16:03:49+02:00 Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ Friedman, Matt 2007 http://dx.doi.org/10.1017/s175569100700607x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S175569100700607X en eng Cambridge University Press (CUP) Earth and Environmental Science Transactions of the Royal Society of Edinburgh volume 98, issue 02, page 179-198 ISSN 1755-6910 1755-6929 General Earth and Planetary Sciences General Environmental Science journal-article 2007 crcambridgeupr https://doi.org/10.1017/s175569100700607x 2022-04-07T08:07:34Z ABSTRACT New cranial material of the ‘rhynchodipterid’ lungfish Soederberghia groenlandica from Upper Devonian (Famennian) strata in East Greenland is described. Previously unknown structures identified here include components of the hyoid arch (ceratohyal, hypohyal) and the lower jaw (prearticular, dentary). Earlier interpretations of the cheek and mandible of Soederberghia are reconsidered in the light of new fossil specimens. Some of the difficulties in assessing the homologies between cheek bones in Soederberghia and those of other lungfishes stem from confusion over the arrangement in Rhynchodipterus , and a revised interpretation of this genus is proposed. The single infraorbital bar found in Soederberghia probably originates, in part, from an expanded bone 10 (quadratojugal) of the kind found in Griphognathus . Hypotheses that posit ‘rhynchodipterid’ polyphyly seem unlikely in light of a set of derived cranial characters that define a coherent radiation of long-snouted, denticle-bearing lungfishes known from the Late Devonian. The hypothesis presented here places ‘rhynchodipterids’ as a paraphyletic grade with respect to fleurantiids. Rhynchodipterus , Soederberghia , and fleurantiids form a clade to the exclusion of the species of Griphognathus . G. minutidens is the sister taxon to this apical group, while G. sculpta and G. whitei are more remote from it. Article in Journal/Newspaper East Greenland Greenland Cambridge University Press (via Crossref) Greenland Earth and Environmental Science Transactions of the Royal Society of Edinburgh 98 02 179 198 |
institution |
Open Polar |
collection |
Cambridge University Press (via Crossref) |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Environmental Science Friedman, Matt Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
ABSTRACT New cranial material of the ‘rhynchodipterid’ lungfish Soederberghia groenlandica from Upper Devonian (Famennian) strata in East Greenland is described. Previously unknown structures identified here include components of the hyoid arch (ceratohyal, hypohyal) and the lower jaw (prearticular, dentary). Earlier interpretations of the cheek and mandible of Soederberghia are reconsidered in the light of new fossil specimens. Some of the difficulties in assessing the homologies between cheek bones in Soederberghia and those of other lungfishes stem from confusion over the arrangement in Rhynchodipterus , and a revised interpretation of this genus is proposed. The single infraorbital bar found in Soederberghia probably originates, in part, from an expanded bone 10 (quadratojugal) of the kind found in Griphognathus . Hypotheses that posit ‘rhynchodipterid’ polyphyly seem unlikely in light of a set of derived cranial characters that define a coherent radiation of long-snouted, denticle-bearing lungfishes known from the Late Devonian. The hypothesis presented here places ‘rhynchodipterids’ as a paraphyletic grade with respect to fleurantiids. Rhynchodipterus , Soederberghia , and fleurantiids form a clade to the exclusion of the species of Griphognathus . G. minutidens is the sister taxon to this apical group, while G. sculpta and G. whitei are more remote from it. |
format |
Article in Journal/Newspaper |
author |
Friedman, Matt |
author_facet |
Friedman, Matt |
author_sort |
Friedman, Matt |
title |
Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ |
title_short |
Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ |
title_full |
Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ |
title_fullStr |
Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ |
title_full_unstemmed |
Cranial structure in the Devonian lungfish Soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ |
title_sort |
cranial structure in the devonian lungfish soederberghia groenlandica and its implications for the interrelationships of ‘rhynchodipterids’ |
publisher |
Cambridge University Press (CUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1017/s175569100700607x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S175569100700607X |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
Earth and Environmental Science Transactions of the Royal Society of Edinburgh volume 98, issue 02, page 179-198 ISSN 1755-6910 1755-6929 |
op_doi |
https://doi.org/10.1017/s175569100700607x |
container_title |
Earth and Environmental Science Transactions of the Royal Society of Edinburgh |
container_volume |
98 |
container_issue |
02 |
container_start_page |
179 |
op_container_end_page |
198 |
_version_ |
1766399512429985792 |