Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?"
Large nektonic suspension feeders have evolved multiple times. The apparent trend among apex predators for some evolving into feeding on small zooplankton is of interest for understanding the associated shifts in anatomy and behaviour, while the spatial and temporal distribution gives clues to an in...
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ftdatacite:10.6084/m9.figshare.c.4971941.v1 2023-05-15T15:37:14+02:00 Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?" Coatham, Samuel J. Vinther, Jakob Rayfield, Emily J. Klug, Christian 2020 https://dx.doi.org/10.6084/m9.figshare.c.4971941.v1 https://rs.figshare.com/collections/Supplementary_material_from_Was_the_Devonian_placoderm_i_Titanichthys_i_a_suspension_feeder_/4971941/1 unknown The Royal Society https://dx.doi.org/10.1098/rsos.200272 https://dx.doi.org/10.6084/m9.figshare.c.4971941 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 110601 Biomechanics FOS Health sciences Collection article 2020 ftdatacite https://doi.org/10.6084/m9.figshare.c.4971941.v1 https://doi.org/10.1098/rsos.200272 https://doi.org/10.6084/m9.figshare.c.4971941 2021-11-05T12:55:41Z Large nektonic suspension feeders have evolved multiple times. The apparent trend among apex predators for some evolving into feeding on small zooplankton is of interest for understanding the associated shifts in anatomy and behaviour, while the spatial and temporal distribution gives clues to an inherent relationship with ocean primary productivity and how past and future perturbations to these may impact on the different tiers of the food web. The evolution of large nektonic suspension feeders— ‘gentle giants’—occurred four times among chondrichthyan fishes (e.g. whale sharks, basking sharks and manta rays), as well as in baleen whales (mysticetes), the Mesozoic pachycormid fishes and at least twice in radiodontan stem group arthropods (Anomalocaridids) during the Cambrian explosion. The Late Devonian placoderm Titanichthys has tentatively been considered to have been a megaplanktivore, primarily due to its gigantic size and narrow, edentulous jaws while no suspension-feeding apparatus have ever been reported. Here, the potential for microphagy and other feeding behaviours in Titanichthys is assessed via a comparative study of jaw mechanics in Titanichthys and other placoderms with presumably differing feeding habits (macrophagy and durophagy). Finite-element models of the lower jaws of Titanichthys termieri in comparison to Dunkleosteus terrelli and Tafilalichthys lavocati reveal considerably less resistance to von Mises stress in this taxon. Comparisons with a selection of large-bodied extant taxa of similar ecological diversity reveal similar disparities in jaw stress resistance. Our results, therefore, conform to the hypothesis that Titanichthys was a suspension feeder with jaws ill-suited for biting and crushing but well suited for gaping ram feeding. Article in Journal/Newspaper baleen whales DataCite Metadata Store (German National Library of Science and Technology) |
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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 110601 Biomechanics FOS Health sciences |
spellingShingle |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 110601 Biomechanics FOS Health sciences Coatham, Samuel J. Vinther, Jakob Rayfield, Emily J. Klug, Christian Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?" |
topic_facet |
Evolutionary Biology FOS Biological sciences 40308 Palaeontology incl. Palynology FOS Earth and related environmental sciences 110601 Biomechanics FOS Health sciences |
description |
Large nektonic suspension feeders have evolved multiple times. The apparent trend among apex predators for some evolving into feeding on small zooplankton is of interest for understanding the associated shifts in anatomy and behaviour, while the spatial and temporal distribution gives clues to an inherent relationship with ocean primary productivity and how past and future perturbations to these may impact on the different tiers of the food web. The evolution of large nektonic suspension feeders— ‘gentle giants’—occurred four times among chondrichthyan fishes (e.g. whale sharks, basking sharks and manta rays), as well as in baleen whales (mysticetes), the Mesozoic pachycormid fishes and at least twice in radiodontan stem group arthropods (Anomalocaridids) during the Cambrian explosion. The Late Devonian placoderm Titanichthys has tentatively been considered to have been a megaplanktivore, primarily due to its gigantic size and narrow, edentulous jaws while no suspension-feeding apparatus have ever been reported. Here, the potential for microphagy and other feeding behaviours in Titanichthys is assessed via a comparative study of jaw mechanics in Titanichthys and other placoderms with presumably differing feeding habits (macrophagy and durophagy). Finite-element models of the lower jaws of Titanichthys termieri in comparison to Dunkleosteus terrelli and Tafilalichthys lavocati reveal considerably less resistance to von Mises stress in this taxon. Comparisons with a selection of large-bodied extant taxa of similar ecological diversity reveal similar disparities in jaw stress resistance. Our results, therefore, conform to the hypothesis that Titanichthys was a suspension feeder with jaws ill-suited for biting and crushing but well suited for gaping ram feeding. |
format |
Article in Journal/Newspaper |
author |
Coatham, Samuel J. Vinther, Jakob Rayfield, Emily J. Klug, Christian |
author_facet |
Coatham, Samuel J. Vinther, Jakob Rayfield, Emily J. Klug, Christian |
author_sort |
Coatham, Samuel J. |
title |
Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?" |
title_short |
Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?" |
title_full |
Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?" |
title_fullStr |
Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?" |
title_full_unstemmed |
Supplementary material from "Was the Devonian placoderm Titanichthys a suspension feeder?" |
title_sort |
supplementary material from "was the devonian placoderm titanichthys a suspension feeder?" |
publisher |
The Royal Society |
publishDate |
2020 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4971941.v1 https://rs.figshare.com/collections/Supplementary_material_from_Was_the_Devonian_placoderm_i_Titanichthys_i_a_suspension_feeder_/4971941/1 |
genre |
baleen whales |
genre_facet |
baleen whales |
op_relation |
https://dx.doi.org/10.1098/rsos.200272 https://dx.doi.org/10.6084/m9.figshare.c.4971941 |
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.4971941.v1 https://doi.org/10.1098/rsos.200272 https://doi.org/10.6084/m9.figshare.c.4971941 |
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