Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa
A thesis submitted in fulfilment of the academic requirements for the degree of Doctor of Philosophy to the Faculty of Science, School of Geoscience, University of the Witwatersrand, Johannesburg, 2022 Titanosuchidae are a goup of derived herbivorous long snouted dinocephalians currently only known...
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ftunivwitwaters:oai:wiredspace.wits.ac.za:10539/34567 2023-06-11T04:13:37+02:00 Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa Jirah, Sifelani 2022 application/pdf https://hdl.handle.net/10539/34567 en eng https://hdl.handle.net/10539/34567 Thesis 2022 ftunivwitwaters 2023-05-15T09:49:47Z A thesis submitted in fulfilment of the academic requirements for the degree of Doctor of Philosophy to the Faculty of Science, School of Geoscience, University of the Witwatersrand, Johannesburg, 2022 Titanosuchidae are a goup of derived herbivorous long snouted dinocephalians currently only known from the South African Karoo Supergroup. Taxonomic revision of the titanosuchids, for the first time accompanied by detailed anatomical descriptions and illustrations of representative cranial and postcranial material, enabled recognition of only two genera each represented by a single species out of nine previously recognized species. These are Titanosuchus ferox and Jonkeria truculenta. Jonkeria vanderbyli, Jonkeria ingens, Jonkeria haughtoni, Jonkeria parva, Jonkeria rossouwi and Jonkeria boonstrai are here, synonymized with Jonkeria truculenta. The species Jonkeria koupensis is a nomen dubium only identified as Titanosuchid indet. Cranial characters, which modify during ontogenetic development, were, recognized for Jonkeria, and for the first time an ontogenetic growth series is, presented for this species. This research has for the first time produced a phylogenetic analysis of the two titanosuchid taxa with their deuterosaurid, estemmenosuchid, anteosaurid, styracocephalid and tapinocephalid counterparts confirming the sister group relationship between Styracocephalidae, Estemmenosuchidae, Titanosuchidae and Tapinocephalidae. This phylogenetic analysis manifests a long ghost lineage extending over most of the Guadalupian. The first extensive stratigraphic analysis of the Titanosuchidae shows that the South African Karoo Supergroup hosts both genera in the upper levels of the Abrahamskraal Formation (Moordenaars Member) with a single specimen (Titanosuchid indet) recovered in the lower levels of the overlying Poortjie Member of the Teekloof Formation. The absence of titanosuchids in the Karelskraal Member of the Abrahamskraal Formation and their reappearance in the lower Poortjie could be a case of a “Lazarus ... Thesis karelsk* University of the Witwatersrand, Johannesburg: WITS Institutional Repository on DSpace (WIReDSpace) |
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University of the Witwatersrand, Johannesburg: WITS Institutional Repository on DSpace (WIReDSpace) |
op_collection_id |
ftunivwitwaters |
language |
English |
description |
A thesis submitted in fulfilment of the academic requirements for the degree of Doctor of Philosophy to the Faculty of Science, School of Geoscience, University of the Witwatersrand, Johannesburg, 2022 Titanosuchidae are a goup of derived herbivorous long snouted dinocephalians currently only known from the South African Karoo Supergroup. Taxonomic revision of the titanosuchids, for the first time accompanied by detailed anatomical descriptions and illustrations of representative cranial and postcranial material, enabled recognition of only two genera each represented by a single species out of nine previously recognized species. These are Titanosuchus ferox and Jonkeria truculenta. Jonkeria vanderbyli, Jonkeria ingens, Jonkeria haughtoni, Jonkeria parva, Jonkeria rossouwi and Jonkeria boonstrai are here, synonymized with Jonkeria truculenta. The species Jonkeria koupensis is a nomen dubium only identified as Titanosuchid indet. Cranial characters, which modify during ontogenetic development, were, recognized for Jonkeria, and for the first time an ontogenetic growth series is, presented for this species. This research has for the first time produced a phylogenetic analysis of the two titanosuchid taxa with their deuterosaurid, estemmenosuchid, anteosaurid, styracocephalid and tapinocephalid counterparts confirming the sister group relationship between Styracocephalidae, Estemmenosuchidae, Titanosuchidae and Tapinocephalidae. This phylogenetic analysis manifests a long ghost lineage extending over most of the Guadalupian. The first extensive stratigraphic analysis of the Titanosuchidae shows that the South African Karoo Supergroup hosts both genera in the upper levels of the Abrahamskraal Formation (Moordenaars Member) with a single specimen (Titanosuchid indet) recovered in the lower levels of the overlying Poortjie Member of the Teekloof Formation. The absence of titanosuchids in the Karelskraal Member of the Abrahamskraal Formation and their reappearance in the lower Poortjie could be a case of a “Lazarus ... |
format |
Thesis |
author |
Jirah, Sifelani |
spellingShingle |
Jirah, Sifelani Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa |
author_facet |
Jirah, Sifelani |
author_sort |
Jirah, Sifelani |
title |
Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa |
title_short |
Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa |
title_full |
Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa |
title_fullStr |
Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa |
title_full_unstemmed |
Middle Permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the Karoo basin, South Africa |
title_sort |
middle permian diversity of large herbivores: taxonomic revision of the titanosuchidae (therapsida, dinocephalia) of the karoo basin, south africa |
publishDate |
2022 |
url |
https://hdl.handle.net/10539/34567 |
genre |
karelsk* |
genre_facet |
karelsk* |
op_relation |
https://hdl.handle.net/10539/34567 |
_version_ |
1768390849041793024 |