Morphological and functional diversity in therizinosaur claws and the implications for theropod claw evolution

Research output: Contribution to journalArticlepeer-review

Standard

Harvard

APA

Vancouver

Author

Bibtex

@article{0d620416f42e42709e42818569ea650d,
title = "Morphological and functional diversity in therizinosaur claws and the implications for theropod claw evolution",
abstract = "Therizinosaurs are a group of herbivorous theropod dinosaurs from theCretaceous of North America and Asia, best known for their iconically largeand elongate manual claws. However, among Therizinosauria, ungual morphology is highly variable, reflecting a general trend found in derivedtheropod dinosaurs (Maniraptoriformes). A combined approach of shapeanalysis to characterize changes in manual ungual morphology across theropods and finite-element analysis to assess the biomechanical properties ofdifferent ungual shapes in therizinosaurs reveals a functional diversity relatedto ungual morphology. While some therizinosaur taxa used their claws in ageneralist fashion, other taxa were functionally adapted to use the claws asgrasping hooks during foraging. Results further indicate that maniraptoriformdinosaurs deviated from the plesiomorphic theropod ungual morphologyresulting in increased functional diversity. This trend parallels modificationsof the cranial skeleton in derived theropods in response to dietary adaptation,suggesting that dietary diversification was a major driver for morphologicaland functional disparity in theropod evolution.",
keywords = "Theropoda, Shape analysis, Finite-element analysis, Functional morphology",
author = "Stephan Lautenschlager",
year = "2014",
month = jun,
day = "22",
doi = "10.1098/rspb.2014.0497",
language = "English",
volume = "281",
journal = "Royal Society of London. Proceedings B. Biological Sciences",
issn = "0962-8452",
publisher = "The Royal Society",
number = "1785",

}

RIS

TY - JOUR

T1 - Morphological and functional diversity in therizinosaur claws and the implications for theropod claw evolution

AU - Lautenschlager, Stephan

PY - 2014/6/22

Y1 - 2014/6/22

N2 - Therizinosaurs are a group of herbivorous theropod dinosaurs from theCretaceous of North America and Asia, best known for their iconically largeand elongate manual claws. However, among Therizinosauria, ungual morphology is highly variable, reflecting a general trend found in derivedtheropod dinosaurs (Maniraptoriformes). A combined approach of shapeanalysis to characterize changes in manual ungual morphology across theropods and finite-element analysis to assess the biomechanical properties ofdifferent ungual shapes in therizinosaurs reveals a functional diversity relatedto ungual morphology. While some therizinosaur taxa used their claws in ageneralist fashion, other taxa were functionally adapted to use the claws asgrasping hooks during foraging. Results further indicate that maniraptoriformdinosaurs deviated from the plesiomorphic theropod ungual morphologyresulting in increased functional diversity. This trend parallels modificationsof the cranial skeleton in derived theropods in response to dietary adaptation,suggesting that dietary diversification was a major driver for morphologicaland functional disparity in theropod evolution.

AB - Therizinosaurs are a group of herbivorous theropod dinosaurs from theCretaceous of North America and Asia, best known for their iconically largeand elongate manual claws. However, among Therizinosauria, ungual morphology is highly variable, reflecting a general trend found in derivedtheropod dinosaurs (Maniraptoriformes). A combined approach of shapeanalysis to characterize changes in manual ungual morphology across theropods and finite-element analysis to assess the biomechanical properties ofdifferent ungual shapes in therizinosaurs reveals a functional diversity relatedto ungual morphology. While some therizinosaur taxa used their claws in ageneralist fashion, other taxa were functionally adapted to use the claws asgrasping hooks during foraging. Results further indicate that maniraptoriformdinosaurs deviated from the plesiomorphic theropod ungual morphologyresulting in increased functional diversity. This trend parallels modificationsof the cranial skeleton in derived theropods in response to dietary adaptation,suggesting that dietary diversification was a major driver for morphologicaland functional disparity in theropod evolution.

KW - Theropoda

KW - Shape analysis

KW - Finite-element analysis

KW - Functional morphology

U2 - 10.1098/rspb.2014.0497

DO - 10.1098/rspb.2014.0497

M3 - Article

VL - 281

JO - Royal Society of London. Proceedings B. Biological Sciences

JF - Royal Society of London. Proceedings B. Biological Sciences

SN - 0962-8452

IS - 1785

M1 - 20140497

ER -