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December 2016
Vol.40-2
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Print ISSN: 0031-0247
Online ISSN: 2274-0333
Frequency: biannual

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Lower Paleogene crocodilians from Silveirinha, Portugal.
Miguel T. Antunes
Keywords: ?Upper Paleocene / Lowermost Eocene; Crocodilians; Ecology; Portugal
 
  Abstract

    The presence at Silveirinha of one of the earliest, ? Late Paleocene or Lowermost Eocene, european representatives of the genus Diplocynodon is based mostly on isolated bones and teeth (often from juveniles). This small-sized form is the only crocodilian so far recognized in this site. The longevity of Diplocynodon in Portugal becomes much extended; the genus survived there until the Middle Miocene at least. A discussion on the possible affinities with other eocene Díplocynodon and especially those from Cubillos-Valdegallina (Zamora, Spain) is presented. On the other hand, differences have been detected in comparison with: Díplocynodon tormis, from the middle Eocene of the Douro basin in Spain, which may belong to another phyletic line; and the aff. Diplocynodon from Dormaal (Belgium) and Le Quesnoy (France), nearly contemporaneous of Silveirinha. The Silveirinha Diplocynodon and many other data strongly suggest moist, subtropical, quite limited in space environments related to an alluvial plain crossed by small, meandering channels. 


  Article infos

Published in Vol. 32, Fasc. 1 (2003)

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Les crocodiliens paléogenes du Tilemsi (Mali): un aperçu systématique
Eric Buffetaut
Keywords: Crocodilians; Dyrosoridae; Eocene; Mali; Palaeocene
 
  Abstract

    Abundant crocodilian fossil remains have been collected, mainly by R. Lavocat. from several levels of the
    Palaeogene of the Tilemsi valley (eastern Mali). Several dyrosaurids occur in the Palaeocene (Montian ?) : Phosphatosaurus sp., Hyposaurus bequaerti (Dollo). H. wilsoni (Swinton). H. nopesai (Swinton), Rhabdognathus rarus Swinton, R. compressus n. sp. ln the lower Eocene has been found a dyrosaurid which cannot be accurutely determined.In the middle Eocene were found a dyrosaurid, Tilemsisuchus lavocati n. g., n. sp., and an indeterminate eusuchian. 


  Article infos

Published in Vol. 9, Ext (1980)

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