A gravid marine fossil turtle from the Early Cretaceous reveals a different egg development strategy to that of extant marine turtles

Edwin Alberto Cadena Rueda

doi:10.1111/pala.12413

A gravid marine fossil turtle from the Early Cretaceous reveals a different egg development strategy to that of extant marine turtles

Título traducido de la contribución: Tortuga marina fósil en estado de gravidez del Cretácico Temprano revela una diferente estrategia de desarrollo reproductive en contraste con las tortugas marinas actuales

Edwin Alberto Cadena Rueda

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

12 Citas (Scopus)

Resumen

Las tortugas marinas existentes desarrollan y ponen huevos flexibles (flexibles); sin embargo, se desconoce si heredaron esta estrategia reproductiva de sus parientes fósiles más cercanos o si representa una novedad evolutiva. Aquí, describimos la primera tortuga fósil marina gravísima indiscutible jamás encontrada, desde el antiguo Cretáceo de Colombia, perteneciente a Desmatochelyspadillai Cadena & Parham, que constituye un representante de los Protoestegidos. Usando la sección delgada de uno de los huevos, además de la microscopía electrónica de barrido junto con la caracterización elemental, la catodoluminiscencia y la tomografía computarizada, establecimos que Desmatochelys padillai produjo huevos rígidos similares a los asociados con algunas de las tortugas de agua dulce y terrestre. Al menos 48 huevos esféricos fueron conservados dentro de esta tortuga gravídica. Sugerimos que el desarrollo de huevos rígidos en la tortuga marina Desmatochelyspadillai extinta resultó como una adaptación para los requisitos de embrión de huevo, en función de los atributos físicos del sitio de anidación

Título traducido de la contribución	Tortuga marina fósil en estado de gravidez del Cretácico Temprano revela una diferente estrategia de desarrollo reproductive en contraste con las tortugas marinas actuales
Idioma original	Inglés estadounidense
Páginas (desde-hasta)	1
Número de páginas	13
Publicación	Palaeontology
DOI	https://doi.org/10.1111/pala.12413
Estado	Publicación electrónica previa a su impresión - dic. 19 2018

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title = "A gravid marine fossil turtle from the Early Cretaceous reveals a different egg development strategy to that of extant marine turtles",

abstract = "Extant sea turtles develop and lay pliable (flexible)eggs; however, it is unknown whether they inherited thisreproductive strategy from their closer fossil relatives or if itrepresents an evolutionary novelty. Here, we describe the firstundisputable gravid marine fossil turtle ever found, from theearly Cretaceous of Colombia, belonging to Desmatochelyspadillai Cadena & Parham, which constitutes a representativeof the Protostegidae. Using thin sectioning of one of the eggs, aswell as scanning electron microscopy coupled with elementalcharacterization, cathodoluminescence, and computer tomography,we established that Desmatochelys padillai produced rigideggs similar to those associated with some extant and fossilfreshwater and terrestrial turtles. At least 48 spherical eggs werepreserved inside this gravid turtle. We suggest that the developmentof rigid eggs in the extinct marine turtle Desmatochelyspadillai resulted as an adaptation for egg-embryo requirementsdictated by the physical attributes of the nesting site.",

author = "{Cadena Rueda}, {Edwin Alberto}",

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day = "19",

doi = "10.1111/pala.12413",

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T1 - A gravid marine fossil turtle from the Early Cretaceous reveals a different egg development strategy to that of extant marine turtles

AU - Cadena Rueda, Edwin Alberto

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N2 - Extant sea turtles develop and lay pliable (flexible)eggs; however, it is unknown whether they inherited thisreproductive strategy from their closer fossil relatives or if itrepresents an evolutionary novelty. Here, we describe the firstundisputable gravid marine fossil turtle ever found, from theearly Cretaceous of Colombia, belonging to Desmatochelyspadillai Cadena & Parham, which constitutes a representativeof the Protostegidae. Using thin sectioning of one of the eggs, aswell as scanning electron microscopy coupled with elementalcharacterization, cathodoluminescence, and computer tomography,we established that Desmatochelys padillai produced rigideggs similar to those associated with some extant and fossilfreshwater and terrestrial turtles. At least 48 spherical eggs werepreserved inside this gravid turtle. We suggest that the developmentof rigid eggs in the extinct marine turtle Desmatochelyspadillai resulted as an adaptation for egg-embryo requirementsdictated by the physical attributes of the nesting site.

AB - Extant sea turtles develop and lay pliable (flexible)eggs; however, it is unknown whether they inherited thisreproductive strategy from their closer fossil relatives or if itrepresents an evolutionary novelty. Here, we describe the firstundisputable gravid marine fossil turtle ever found, from theearly Cretaceous of Colombia, belonging to Desmatochelyspadillai Cadena & Parham, which constitutes a representativeof the Protostegidae. Using thin sectioning of one of the eggs, aswell as scanning electron microscopy coupled with elementalcharacterization, cathodoluminescence, and computer tomography,we established that Desmatochelys padillai produced rigideggs similar to those associated with some extant and fossilfreshwater and terrestrial turtles. At least 48 spherical eggs werepreserved inside this gravid turtle. We suggest that the developmentof rigid eggs in the extinct marine turtle Desmatochelyspadillai resulted as an adaptation for egg-embryo requirementsdictated by the physical attributes of the nesting site.

U2 - 10.1111/pala.12413

DO - 10.1111/pala.12413

M3 - Article

SN - 0031-0239

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JF - Palaeontology

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A gravid marine fossil turtle from the Early Cretaceous reveals a different egg development strategy to that of extant marine turtles

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