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Article: The dentary of Wareolestes rex (Megazostrodontidae): a new specimen from Scotland and implications for morganucodontan tooth replacement

Papers in Palaeontology - Volume 3 Part 3 - Cover
Publication: Papers in Palaeontology
Volume: 3
Part: 3
Publication Date: August 2017
Page(s): 373 386
Author(s): Elsa Panciroli, Roger B. J. Benson, and Stig Walsh
DOI: 10.1002/spp2.1079
Addition Information

How to Cite

PANCIROLI, E., BENSON, R.B.J., WALSH, S. 2017. The dentary of Wareolestes rex (Megazostrodontidae): a new specimen from Scotland and implications for morganucodontan tooth replacement. Papers in Palaeontology, 3, 3, 373-386. DOI: 10.1002/spp2.1079

Author Information

  • Elsa Panciroli - School of Geosciences University of Edinburgh, Grant Institute Edinburgh UK (Email:
  • Elsa Panciroli - National Museum of Scotland Edinburgh UK
  • Roger B. J. Benson - Department of Earth Sciences University of Oxford Oxford UK (Email:
  • Stig Walsh - National Museum of Scotland Edinburgh UK (Email:

Publication History

  • Issue published online: 01 August 2017
  • Manuscript Accepted: 20 March 2017
  • Manuscript Received: 20 January 2017

Funded By

European Union's Horizon 2020 research and innovation programme2014–2018. Grant Number: 677774

Online Version Hosted By

Wiley Online Library
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The Middle Jurassic morganucodontan, Wareolestes rex, was previously known from only four isolated molars from Kirtlington, England. There has been debate over the position of the holotype tooth as an upper or lower molar. We describe a new Wareolestes specimen from the Kilmaluag Formation of Scotland: a partial left dentary with two erupted molars, one unerupted molar and three unerupted premolars. Empty alveoli for a canine, p1 and p3 are also present. Through detailed comparison of the morphology of the holotype and our new material, we support the original diagnosis of the holotype Wareolestes as a lower molar, most likely m1. The position of erupted and unerupted replacement teeth in the newly discovered specimen supports a diphyodont pattern of tooth replacement of premolariform dentition in Wareolestes, as suggested for other morganucodontans such as Morganucodon, Megazostrodon and Dinnetherium. However, damage to the dentary means that questions remain regarding the sequence of replacement in Wareolestes along the tooth row.

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