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AUTHOR

Víctor Selles De Lucas

showing 3 related works from this author

Functional assessment of morphological homoplasy in stem-gnathostomes

2021

Osteostraci and Galeaspida are stem-gnathostomes, occupying a key phylogenetic position for resolving the nature of the jawless ancestor from which jawed vertebrates evolved more than 400 million years ago. Both groups are characterized by the presence of rigid headshields that share a number of common morphological traits, in some cases hindering the resolution of their interrelationships and the exact nature of their affinities with jawed vertebrates. Here, we explore the morphological and functional diversity of osteostracan and galeaspid headshields using an innovative approach that combines geometric morphometrics and computational fluid dynamics, thereby constraining the underlying fa…

0106 biological sciences010506 paleontologycomputational fluid dynamicsPaleontologia010603 evolutionary biology01 natural sciencesGeneral Biochemistry Genetics and Molecular BiologyAnimalsgeometric morphometricsPhylogeny0105 earth and related environmental sciencesGeneral Environmental ScienceAncestorGeneral Immunology and MicrobiologybiologyPhylogenetic treehomoplasyGeneral Medicinebiology.organism_classificationBiological EvolutionGaleaspidaOsteostraciJawPalaeobiologyEvolutionary biologyVertebratesvertebratesGeneral Agricultural and Biological Sciencesstem-gnathostomes
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Computational Fluid Dynamics Suggests Ecological Diversification among Stem-Gnathostomes.

2020

Summary The evolutionary assembly of the vertebrate bodyplan has been characterized as a long-term ecological trend toward increasingly active and predatory lifestyles, culminating in jawed vertebrates that dominate modern vertebrate biodiversity [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. This contrast is no more stark than between the earliest jawed vertebrates and their immediate relatives, the extinct jawless, dermal armor-encased osteostracans, which have conventionally been interpreted as benthic mud-grubbers with poor swimming capabilities and low maneuverability [ 9 , 10 , 11 , 12 ]. Using computational fluid dynamics, we show that osteostracan headshield morphology is compatible with a dive…

0301 basic medicineWater flowcomputational fluid dynamicsBiologyDiversification (marketing strategy)General Biochemistry Genetics and Molecular BiologyPassive control03 medical and health sciences0302 clinical medicinebiology.animalAnimalsComputer Simulation14. Life underwatergeometric morphometricsSwimmingKey innovationEcologyFossilsFishesVertebrateBiodiversityFeeding BehaviorSubstrate (marine biology)jawed vertebratesBiological Evolution030104 developmental biologyBenthic zoneOblate spheroidHydrodynamicsecologyGeneral Agricultural and Biological Sciencesstem-gnathostomesHead030217 neurology & neurosurgeryEvolució (Biologia)Current biology : CB
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Supplementary material from Functional assessment of morphological homoplasy in stem-gnathostomes

2021

The Osteostraci and Galeaspida are stem-gnathostomes, occupying a key phylogenetic position for resolving the nature of the jawless ancestor from which jawed vertebrates evolved more than 400 million years ago. Both groups are characterized by the presence of rigid headshields that share a number of common morphological traits, in some cases hindering the resolution of their interrelationships and the exact nature of their affinities with jawed vertebrates. Here, we explore the morphological and functional diversity of osteostracan and galeaspid headshields using an innovative approach that combines geometric morphometrics and computational fluid dynamics, thereby constraining the underlyin…

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