A new basal snake from the mid-Cretaceous of Morocco

Catherine G. Klein, Nicholas R. Longrich, Nizar Ibrahim, Samir Zouhri, David M. Martill

Research output: Contribution to journalArticle

9 Citations (Scopus)
170 Downloads (Pure)

Abstract

Fossil snakes are relatively well represented in the Upper Cretaceous of northern Africa, with material known from Morocco, Sudan, Egypt, Libya, Algeria, and Niger. The Moroccan Kem Kem beds have yielded a particularly diverse snake assemblage, with Simoliophiidae, Madtsoiidae, ?Nigerophiidae and several unnamed taxa co-occurring. These fossils are important for our understanding of the early evolutionary history of snakes, and may shed light on the ecology and initial diversification of basal snakes. We describe a new taxon, Norisophis begaa gen. et sp. nov., from the Kem Kem beds of Begaa, in southeast Morocco. It is characterised by a marked interzygapophyseal constriction, parazygantral foramina, an incipient prezygapophyseal process, and an anterio-posteriorly short centrum. Several characteristics shared with Najash, Seismophis, Madtsoiidae, and Coniophis suggest that Norisophis is a stem ophidian. N. begaa further increases the diversity and disparity of snakes within the Kem Kem beds, supporting the hypothesis that Africa was a mid-Cretaceous hotspot for snake diversity.

Original languageEnglish
Pages (from-to)134-141
Number of pages8
JournalCretaceous Research
Volume72
DOIs
Publication statusPublished - 1 Apr 2017

Keywords

  • Cretaceous
  • Kem Kem
  • Morocco
  • Ophidia
  • Serpentes

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