Fred Ruhe
Well-known member
Géraldine Garcia, Cécile Mourer-Chauviré, Mohammed Adaci, Mustapha Bensalah, Fateh Mebrouk, Xavier Valentin, M'hammed Mahboubi & Rodolphe Tabuce, 2019
First discovery of avian egg and bone remains (Presbyornithidae) from the Gour Lazib (Eocene, Algeria)
Journal of African Earth Sciences. in press: Article 103666. doi:10.1016/j.jafrearsci.2019.103666
https://www.sciencedirect.com/science/article/pii/S1464343X19303218?via=ihub
Highlights:
Numerous avian eggshells and one well-preserved small ovoid-shaped egg (32 × 28 mm) were collected from three localities in the Gour Lazib area (HGL10, HGL51 and HGL62), western Algeria from the Glib Zegdou Formation dated from the late early or early middle Eocene.
This material was associated with a rich vertebrate fauna. The study of the eggshells using microscopies (PLM and SEM) led to attribute them to neognathous birds.
They are characterized by a thin shell (less than 0.5 mm thick) with a prismatic trilaminate microstructure.
The occurrence of an avian carpometacarpus belonging to the Presbyornithidae from HGL50, which is located one meter below the HGL 51 level, suggests that the egg remains may be referred to this bird family, which is so far unknown in the Palaeogene of the Afro-Arabian continent.
Abstract:
Numerous avian eggshells and one well-preserved small ovoid-shaped egg (32 × 28 mm) were collected from three localities in the Gour Lazib area (HGL10, HGL51 and HGL62), western Algeria from the Glib Zegdou Formation dated from the late early or early middle Eocene. This material was associated with a rich vertebrate fauna. The study of the eggshells using microscopies (PLM and SEM) led to attribute them to neognathous birds. They are characterized by a thin shell (less than 0.5 mm thick) with a prismatic trilaminate microstructure. The occurrence of an avian carpometacarpus belonging to the Presbyornithidae from HGL50, which is located one meter below the HGL 51 level, suggests that the egg remains may be referred to this bird family, which is so far unknown in the Palaeogene of the Afro-Arabian continent.
Enjoy,
Fred
First discovery of avian egg and bone remains (Presbyornithidae) from the Gour Lazib (Eocene, Algeria)
Journal of African Earth Sciences. in press: Article 103666. doi:10.1016/j.jafrearsci.2019.103666
https://www.sciencedirect.com/science/article/pii/S1464343X19303218?via=ihub
Highlights:
Numerous avian eggshells and one well-preserved small ovoid-shaped egg (32 × 28 mm) were collected from three localities in the Gour Lazib area (HGL10, HGL51 and HGL62), western Algeria from the Glib Zegdou Formation dated from the late early or early middle Eocene.
This material was associated with a rich vertebrate fauna. The study of the eggshells using microscopies (PLM and SEM) led to attribute them to neognathous birds.
They are characterized by a thin shell (less than 0.5 mm thick) with a prismatic trilaminate microstructure.
The occurrence of an avian carpometacarpus belonging to the Presbyornithidae from HGL50, which is located one meter below the HGL 51 level, suggests that the egg remains may be referred to this bird family, which is so far unknown in the Palaeogene of the Afro-Arabian continent.
Abstract:
Numerous avian eggshells and one well-preserved small ovoid-shaped egg (32 × 28 mm) were collected from three localities in the Gour Lazib area (HGL10, HGL51 and HGL62), western Algeria from the Glib Zegdou Formation dated from the late early or early middle Eocene. This material was associated with a rich vertebrate fauna. The study of the eggshells using microscopies (PLM and SEM) led to attribute them to neognathous birds. They are characterized by a thin shell (less than 0.5 mm thick) with a prismatic trilaminate microstructure. The occurrence of an avian carpometacarpus belonging to the Presbyornithidae from HGL50, which is located one meter below the HGL 51 level, suggests that the egg remains may be referred to this bird family, which is so far unknown in the Palaeogene of the Afro-Arabian continent.
Enjoy,
Fred
