Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti"
A new genus and species of extinct baleen whale, †Toipahautea waitaki (Late Oligocene, New Zealand) is based on a skull and associated bones, from the lower Kokoamu Greensand, about 27.5 Ma (local upper Whaingaroan Stage, early Chattian). The upper jaw includes a thin, elongate and apparently toothl...
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Online Access: | https://dx.doi.org/10.6084/m9.figshare.c.4052780 https://figshare.com/collections/Supplementary_material_from_A_new_archaic_baleen_whale_i_Toipahautea_waitaki_i_early-Late_Oligocene_New_Zealand_and_the_origins_of_crown_Mysticeti_/4052780 |
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ftdatacite:10.6084/m9.figshare.c.4052780 2023-05-15T15:36:54+02:00 Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti" Cheng-Hsiu Tsai R. Ewan Fordyce 2018 https://dx.doi.org/10.6084/m9.figshare.c.4052780 https://figshare.com/collections/Supplementary_material_from_A_new_archaic_baleen_whale_i_Toipahautea_waitaki_i_early-Late_Oligocene_New_Zealand_and_the_origins_of_crown_Mysticeti_/4052780 unknown Figshare https://dx.doi.org/10.1098/rsos.172453 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy Collection article 2018 ftdatacite https://doi.org/10.6084/m9.figshare.c.4052780 https://doi.org/10.1098/rsos.172453 2021-11-05T12:55:41Z A new genus and species of extinct baleen whale, †Toipahautea waitaki (Late Oligocene, New Zealand) is based on a skull and associated bones, from the lower Kokoamu Greensand, about 27.5 Ma (local upper Whaingaroan Stage, early Chattian). The upper jaw includes a thin, elongate and apparently toothless maxilla, with evidence of arterial supply for baleen. Open sutures with the premaxilla suggest a flexible (kinetic) upper jaw. The blowhole is well forward. The mandible is bowed laterally and slightly dorsally; unlike the Eomysticetidae, there are no mandibular alveoli, and the coronoid process is tapered and curved laterally. Jaw structure is consistent with baleen-assisted gulp-feeding. The age of early Chattian makes †Toipahautea a very early, if not the oldest named, toothless and baleen-bearing mysticete, suggesting that the full transition from toothed to baleen-bearing probably occurred in the Early Oligocene. Late Oligocene mysticetes vary considerably in jaw form and kinesis, tooth form and function, and development of baleen, implying a wide range of raptorial, suctorial and filter-feeding behaviour. More study may elucidate the function of jaws, teeth and baleen in terms of opportunist/generalist feeding, as in modern gray whales, versus specialized feeding. We here propose that early mysticetes, when transitioned from toothed to baleen-bearing, were generalists and opportunists instead of specializing in any forms of feeding strategies. In addition, two different phylogenetic analyses placed †Toipahautea either in a polytomy including crown Mysticeti, or immediately basal to the crown, and above †Eomysticetidae in both cases. Because the †Toipahautea waitaki holotype is an immature individual, it may plot more basally in phylogeny than its true position. Article in Journal/Newspaper baleen whale DataCite Metadata Store (German National Library of Science and Technology) New Zealand |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy |
spellingShingle |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy Cheng-Hsiu Tsai R. Ewan Fordyce Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti" |
topic_facet |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 60301 Animal Systematics and Taxonomy 60310 Plant Systematics and Taxonomy |
description |
A new genus and species of extinct baleen whale, †Toipahautea waitaki (Late Oligocene, New Zealand) is based on a skull and associated bones, from the lower Kokoamu Greensand, about 27.5 Ma (local upper Whaingaroan Stage, early Chattian). The upper jaw includes a thin, elongate and apparently toothless maxilla, with evidence of arterial supply for baleen. Open sutures with the premaxilla suggest a flexible (kinetic) upper jaw. The blowhole is well forward. The mandible is bowed laterally and slightly dorsally; unlike the Eomysticetidae, there are no mandibular alveoli, and the coronoid process is tapered and curved laterally. Jaw structure is consistent with baleen-assisted gulp-feeding. The age of early Chattian makes †Toipahautea a very early, if not the oldest named, toothless and baleen-bearing mysticete, suggesting that the full transition from toothed to baleen-bearing probably occurred in the Early Oligocene. Late Oligocene mysticetes vary considerably in jaw form and kinesis, tooth form and function, and development of baleen, implying a wide range of raptorial, suctorial and filter-feeding behaviour. More study may elucidate the function of jaws, teeth and baleen in terms of opportunist/generalist feeding, as in modern gray whales, versus specialized feeding. We here propose that early mysticetes, when transitioned from toothed to baleen-bearing, were generalists and opportunists instead of specializing in any forms of feeding strategies. In addition, two different phylogenetic analyses placed †Toipahautea either in a polytomy including crown Mysticeti, or immediately basal to the crown, and above †Eomysticetidae in both cases. Because the †Toipahautea waitaki holotype is an immature individual, it may plot more basally in phylogeny than its true position. |
format |
Article in Journal/Newspaper |
author |
Cheng-Hsiu Tsai R. Ewan Fordyce |
author_facet |
Cheng-Hsiu Tsai R. Ewan Fordyce |
author_sort |
Cheng-Hsiu Tsai |
title |
Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti" |
title_short |
Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti" |
title_full |
Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti" |
title_fullStr |
Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti" |
title_full_unstemmed |
Supplementary material from "A new archaic baleen whale, Toipahautea waitaki (early-Late Oligocene, New Zealand) and the origins of crown Mysticeti" |
title_sort |
supplementary material from "a new archaic baleen whale, toipahautea waitaki (early-late oligocene, new zealand) and the origins of crown mysticeti" |
publisher |
Figshare |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4052780 https://figshare.com/collections/Supplementary_material_from_A_new_archaic_baleen_whale_i_Toipahautea_waitaki_i_early-Late_Oligocene_New_Zealand_and_the_origins_of_crown_Mysticeti_/4052780 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
baleen whale |
genre_facet |
baleen whale |
op_relation |
https://dx.doi.org/10.1098/rsos.172453 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.4052780 https://doi.org/10.1098/rsos.172453 |
_version_ |
1766367345843896320 |