Ovos e cascas de crocodilomorfos da formação da lourinhã (Jurássico superior), portugal

João Russo, O. Mateus, A. Balbino, M. Marzola

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We here present fossil Crocodylomorpha eggshells from the Upper Jurassic Lourinhã Formation of Portugal, recovered from five sites: one nest from Cambelas with 13 eggs, and three partial eggs and various fragments from, Paimogo N (I), Paimogo S (II), Casal da Rola, and Peralta. All specimens but the nest were found in association with dinosaur egg material. Our research reveals that on a micro- and ultrastructural analysis, all samples present the typical characters consistent with crocodiloid eggshell morphotype, such as the shell unit shape, the organization of the eggshell layers, and the triangular blocky extinction observed with crossed nicols. We assign the material from the Lourinhã Formation to the oofamily Krokolithidae, making it the oldest crocodylomorph eggs known so far, as well as the best record for eggs of non- crocodylian crocodylomorphs. Furthermore, our study indicates that the basic structure of crocodiloid eggshells has remained stable since at least the Upper Jurassic.

Translated title of the contributionOvos e cascas de crocodilomorfos da formação da lourinhã (Jurássico superior), portugal
Original languagePortuguese
Pages (from-to)563-566
Number of pages4
JournalComunicações Geológicas
Volume101
Publication statusPublished - 2014

Fingerprint

eggshell
egg
nest
Jurassic
dinosaur
morphotype
extinction
fossil
shell
material

Keywords

  • Crocodiloid
  • Crocodylomorpha
  • Eggshells
  • Krokolithidae
  • Upper Jurassic

Cite this

@article{622b6dd2d0cf493aa7d828a4142a8deb,
title = "Crocodylomorph eggs and eggshells from the Lourinh{\~a} Fm. (Upper Jurassic), Portugal",
abstract = "We here present fossil Crocodylomorpha eggshells from the Upper Jurassic Lourinh{\~a} Formation of Portugal, recovered from five sites: one nest from Cambelas with 13 eggs, and three partial eggs and various fragments from, Paimogo N (I), Paimogo S (II), Casal da Rola, and Peralta. All specimens but the nest were found in association with dinosaur egg material. Our research reveals that on a micro- and ultrastructural analysis, all samples present the typical characters consistent with crocodiloid eggshell morphotype, such as the shell unit shape, the organization of the eggshell layers, and the triangular blocky extinction observed with crossed nicols. We assign the material from the Lourinh{\~a} Formation to the oofamily Krokolithidae, making it the oldest crocodylomorph eggs known so far, as well as the best record for eggs of non- crocodylian crocodylomorphs. Furthermore, our study indicates that the basic structure of crocodiloid eggshells has remained stable since at least the Upper Jurassic.",
keywords = "Crocodiloid, Crocodylomorpha, Eggshells, Krokolithidae, Upper Jurassic",
author = "Jo{\~a}o Russo and O. Mateus and A. Balbino and M. Marzola",
year = "2014",
language = "Portuguese",
volume = "101",
pages = "563--566",
journal = "Comunica{\cc}{\~o}es Geol{\'o}gicas",
issn = "1647-581X",
publisher = "Laborat{\'o}rio Nacional de Energia e Geologia",

}

Crocodylomorph eggs and eggshells from the Lourinhã Fm. (Upper Jurassic), Portugal. / Russo, João; Mateus, O.; Balbino, A.; Marzola, M.

In: Comunicações Geológicas, Vol. 101, 2014, p. 563-566.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Crocodylomorph eggs and eggshells from the Lourinhã Fm. (Upper Jurassic), Portugal

AU - Russo, João

AU - Mateus, O.

AU - Balbino, A.

AU - Marzola, M.

PY - 2014

Y1 - 2014

N2 - We here present fossil Crocodylomorpha eggshells from the Upper Jurassic Lourinhã Formation of Portugal, recovered from five sites: one nest from Cambelas with 13 eggs, and three partial eggs and various fragments from, Paimogo N (I), Paimogo S (II), Casal da Rola, and Peralta. All specimens but the nest were found in association with dinosaur egg material. Our research reveals that on a micro- and ultrastructural analysis, all samples present the typical characters consistent with crocodiloid eggshell morphotype, such as the shell unit shape, the organization of the eggshell layers, and the triangular blocky extinction observed with crossed nicols. We assign the material from the Lourinhã Formation to the oofamily Krokolithidae, making it the oldest crocodylomorph eggs known so far, as well as the best record for eggs of non- crocodylian crocodylomorphs. Furthermore, our study indicates that the basic structure of crocodiloid eggshells has remained stable since at least the Upper Jurassic.

AB - We here present fossil Crocodylomorpha eggshells from the Upper Jurassic Lourinhã Formation of Portugal, recovered from five sites: one nest from Cambelas with 13 eggs, and three partial eggs and various fragments from, Paimogo N (I), Paimogo S (II), Casal da Rola, and Peralta. All specimens but the nest were found in association with dinosaur egg material. Our research reveals that on a micro- and ultrastructural analysis, all samples present the typical characters consistent with crocodiloid eggshell morphotype, such as the shell unit shape, the organization of the eggshell layers, and the triangular blocky extinction observed with crossed nicols. We assign the material from the Lourinhã Formation to the oofamily Krokolithidae, making it the oldest crocodylomorph eggs known so far, as well as the best record for eggs of non- crocodylian crocodylomorphs. Furthermore, our study indicates that the basic structure of crocodiloid eggshells has remained stable since at least the Upper Jurassic.

KW - Crocodiloid

KW - Crocodylomorpha

KW - Eggshells

KW - Krokolithidae

KW - Upper Jurassic

UR - http://www.scopus.com/inward/record.url?scp=84929080787&partnerID=8YFLogxK

M3 - Article

VL - 101

SP - 563

EP - 566

JO - Comunicações Geológicas

JF - Comunicações Geológicas

SN - 1647-581X

ER -