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1994-05
Vol. 23, Fasc. 1-4
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Print ISSN: 0031-0247
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2274-0333
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PalaeoVertebrata Vol. 23, Fasc. 1-4
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Article

Les rongeurs de l'Eocène d'Afrique Nord-Occidentale [Glib Zegdou ( Algérie) et Chambi (Tunisie)] et l'origine des anomaluridae.
Monique Vianey-Liaud Logo, Jean-Jacques Jaeger Logo, Jean-Louis Hartenberger and Mahammed Mahboubi
Published online: 20/05/1994

Keywords: Africa; Eocene; New taxa; Paleobiogeography; PHYLOGENY; Rodents

https://doi.org/10.18563/pv.23.1-4.93-118

References: 26

Cite this article: Monique Vianey-Liaud, Jean-Jacques Jaeger, Jean-Louis Hartenberger and Mahammed Mahboubi, 1994. Les rongeurs de l'Eocène d'Afrique Nord-Occidentale [Glib Zegdou ( Algérie) et Chambi (Tunisie)] et l'origine des anomaluridae. PalaeoVertebrata 23 (1-4): 93-118. doi: 10.18563/pv.23.1-4.93-118

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Abstract

This paper is about the oldest African rodents faunas, from the late Early Eocene, or early Middle Eocene, Glib Zegdou (Algeria) and Chambi (Tunisia) localities. Five species are described and figured, belonging to a new family here created, the Zegdoumyidae.

This family is compared to the Early and Middle Eocene rodents families from Asia, Europe and North America (Chapattimyidae, Yuomyidae, Gliridae, Theridomyidae, lschyromyidae and Sciuravidae), as well as to those known from the Late Eocene African locality Bir El Ater (Anomaluridae and Phiomyidae).

On the one hand, it seems clear that the African endemic Anomaluridae arise from the Zegdoumyidae. On the other hand, the lschyromyidae, or primitive Sciuravidae, may be the most reliable ancestral groups for the Zegdoumyidae. Thus, this new family can be considered as the sister group for the American Sciuravidae on the one hand, and for the European Gliridae on the other hand.

The biogeographical consequences of these phylogenetic hypotheses are discussed. A new phase of communication between Europe and North Africa is inferred, during the Early Eocene. It has been followed by a short period of endemism, allowing the adaptive radiation for the Zegdoumyidae, preceding the immigration of the Phiomyidae, during the Late Eocene, probably from Asian relatives. 



Published in Vol. 23, Fasc. 1-4 (1994)

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