1. Paleobiology Department, San Diego Natural History Museum, San Diego, California
2. Dipartimento di Scienze della Terra, Università degli Studi di Torino, Torino, Italia
3. Toegepast Natuurwetenschappelijk Onderzoek (TNO-Netherlands Organization for Applied Scientific Research), Geological Survey of The Netherlands,, Utrecht, The Netherlands
4. Oertijdmuseum, Boxtel, The Netherlands
5. Royal Belgian Institute of Natural Sciences, Brussels, Belgium
6. Natuurhistorisch Museum Rotterdam, Rotterdam, The Netherlands