Time of transition: Permo-Triassic therapsids from Gondwana. Colloquia in Paläontologisches Institut und Museum, Universität Zürich. 17-11-2010.

Palaeontology, science with the past, fiction in the present. Science Fiction and Fantasy Society of South Africa. Wits Medical School, Johannesburg. 27-3-2010.

Pre-mammalian evolution and diversity changes during the transition to basal mammaliaformes. BPI Seminar. Bernard Price Institute for Palaeontology, University of the Witwatersrand, South Africa. 30-8-2006.

Los cinodontes y las tendencias evolutivas hacia el origen de los mamíferos. Escuela Normal Juan Bautista Alberdi, San Miguel de Tucumán, Argentina. 16-7-2006.

Chewing the sound: changes in the lower jaw of advanced therapsids and the masticatory/hearing connection. South African Amateur Society of Palaeontology. 21-9-2005.

Evolution of mammalness. South African Amateur Society of Palaeontology. 19-8-2004.