Oryctos
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Accès privé :
| volume 5, 2004 |
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Richard Smith & Thierry Smith, Are the mammals from the middle Ypresian of the Paris Basin (reference-level MP8-9) already present from the Paleocene/Eocene boundary at Dormaal (reference-level MP7, Belgium)? Oryctos 5, 75-82.
Multituberculate mammals are not present in the Dormaal site (MP7, Paleocene-Eocene transition in Belgium) contrary to what Delsate (2000) put forward. The presence of two multituberculate teeth described by this author as well as 4 other teeth of placental mammals and numerous teeth of characiform fishes from the Delsate collection seem to be due to contamination, resulting from the screen washing of sediments collected at a Middle Ypresian site of the Paris Basin (MP8-9). The contaminated material consists of 5 mammal species and 1 characiform species, which are absent in all the other collections from Dormaal (comparisons were made on the basis of 14000 mammal specimens pertaining to 50 taxa). On the other hand, these 6 taxa are typical for the MP8-9 faunas of the Reims area in the Paris Basin. This study also shows that the perissodactyl Hallensia louisi Hooker, 1994 is not present in reference-level MP7 of Dormaal.
Keywords : Dormaal, Delsate collection, contamination
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