Dental anomalies in Upper Eocene Anthracotheriidae: a possible case of inbreeding

Authors

  • STEPHANE DUCROCQ,

    1. Stkphane Ducrocq and jean-Jacques laeger, Luboratoire de Palkontologie, Institut des Sciences de I'Evolution, Case Courrier064, Universitté Montpellier 11, Place Eugene Bataillon, F-34095 Montpellier Cidex 5, France
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    • 3

      Staatliches Museum fijr Naturkunde, Rosenstein 1.0-701 91 Stuttgart, Germany

  • YAOWALAK CHAIMANEE,

    1. Department of Mineral Resources, Geological Survey, Rama VI Road, Bangkok 10400, Thailand
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  • VARAVUDH SUTEETHORN,

    1. Department of Mineral Resources, Geological Survey, Rama VI Road, Bangkok 10400, Thailand
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  • JEAN-JACQUES JAEGER

    1. Stkphane Ducrocq and jean-Jacques laeger, Luboratoire de Palkontologie, Institut des Sciences de I'Evolution, Case Courrier064, Universitté Montpellier 11, Place Eugene Bataillon, F-34095 Montpellier Cidex 5, France
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Abstract

Three fragmentary maxillae and an isolated upper molar from the Upper Eocene locality of Wai Lek (Krabi Basin, South Thailand) belonging to the small anthracotheriid Siamotherium krabiense display strongly abnormal morphologies that are particularly unusual among the dental anomalies recorded in both extant and fossil mammals. Variation and atavism can be ruled out, and the other hypothetical origins of these anomalies, particularly the occurrence of odontomes and inbreeding, are discussed.Dental anomalies, Anthracotheriidae, Asia, atavism, variation, inbreeding.

Stéphane Ducrocq and Jean-Jacques Jaeger, Laboratoire de Paléontologie, Institut des Sciences de l'Evolution, Case Courrier 064, Université Montpellier II, Place Eugéne Bataillon, F-34095 Montpellier Cédex 5, France (SD's current address: Staatliches Museum für Naturkunde, Rosenstein 1, D-70191 Stuttgart, Germany); Yaowalak Chaimanee and Varavudh Suteethorn, Department of Mineral Resources, Geological Survey, Rama VI Road, Bangkok 10400, Thailand; 14th November, 1994; revised 27th July. 1995.

Ancillary