Digital 3D models of theropods for approaching body-mass distribution and volume

  1. Matías Reolid 1
  2. Francisco J. Cardenal 1
  3. Jesús Reolid 2
  1. 1 Universidad de Jaén
    info

    Universidad de Jaén

    Jaén, España

    ROR https://ror.org/0122p5f64

  2. 2 Universidad de Granada
    info

    Universidad de Granada

    Granada, España

    ROR https://ror.org/04njjy449

Revue:
Journal of iberian geology: an international publication of earth sciences

ISSN: 1886-7995 1698-6180

Année de publication: 2021

Volumen: 47

Número: 4

Pages: 599-624

Type: Article

DOI: 10.1007/S41513-021-00172-1 DIALNET GOOGLE SCHOLAR lock_openAccès ouvert editor

D'autres publications dans: Journal of iberian geology: an international publication of earth sciences

Résumé

El objetivo de este trabajo es la obtención de diversos datos morfométricos a partir de la digitalización de maquetas 3D realizadas en base a reconstrucciones cientifcamente elaboradas de especies representativas de ocho familias de terópodos. Las maquetas de PVC analizadas corresponden a los géneros Coelophysis, Dilophosaurus, Ceratosaurus, Allosaurus, Baryonyx, Carnotaurus, Giganotosaurus, y Tyrannosaurus. Los modelos digitales 3D fueron escalados teniendo en cuenta las estimaciones de tamaño publicadas por otros autores para estos taxones. El análisis 3D de estos géneros proporciona información de las variaciones en el modelo funcional de los terópodos, principalmente en cuanto a la longitud de la cabeza y el cuerpo, así como algunas características de las extremidades que permiten inferior tendencias evolutivas y de modo de vida de estos organismos. La relación de tamaños cabeza/cuerpo incrementa de acuerdo con la talla del terópodo, con los valores más bajos obtenidos para Coelophysis (0.093) y los más altos para Tyrannosaurus y Giganotosaurus (0.119 a 0.120). Los modelos digitales obtenidos también proporcionan información que no puede obtenerse solo con el studio de los huesos, aunque éstos son la base de toda reconstrucción, tales como la relación superfcie/volume (S/V). Para los especímenes estudiados, y basándonos en la fdelidad de las maquetas, la S/V varía desde 35.21 en Coelophysis a 5.55 en Tyrannosaurus. Este parámetro, estrechamente relacionado con la disipación de calor por parte del organismo, ayuda a interpretar el metabolismo de taxones extintos. Así, formas primitivas y ligeras del Jurásico inferior (ej. Coelophysis y Dilophosaurus) tuvieron cráneos pequeños y posiblemente una tasa metabólica mayor que los grandes terópodos del Cretácico (ej. Giganotosaurus y Tyrannosaurus). Este trabajo, además, presenta una técnica que, cuando es aplicada a reconstrucciones científcamente cuidadas, proporciona aproximaciones que pueden ser de utilidad en el estudio paleontológico y paleobiológico de los dinosaurios.

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