The Subcommission (ISOS)


Andrei DronovAndrey V. DRONOV
Professor, Geological Institute,
Russian Academy of Sciences,
Pyzhevsky per.7, 119017 Moscow, RUSSIA
Tel: 495-230-81-17

Dr Andrey Dronov is the Leading Scientist in the Laboratory of Phanerozoic Stratigraphy of the Geological Institute of Russian Academy of Sciences, Moscow. He was previously Professor of Geology and Head of the Department of Historical Geology in the Geological Faculty of St.Petersburg State University. His main fields of interest are sequence stratigraphy, sea-level changes, carbonate sedimentology, and trace fossils and facies analysis. He has published 3 monographs including textbook on Palaeoichnology as well as over 60 scientific articles. The main regions of his field research include Central Asia (Tien Shan Mountains and Pamirs), Ordovician of Baltoscandia and Ordovician of the Siberian Platform.

Vice Chairman

Unité EVO ECO PALEO – Evolution, Ecologie et Paléontologie
Université de Lille – Sciences et Technologies
Bâtiment SN5,  59655 Villeneuve d’Ascq Cedex, FRANCE
Tel: +33 (0)3 20 33 72 20

Dr. Thomas Servais is Research Director at the French National Centre for Scientific Research (CNRS), based at the University of Lille. Trained as a geologist and palaeontologist in Namur and Liège (Belgium), he continued post-doctoral research in Berlin (Germany) and at the British Geological Survey (Keyworth-Nottingham, UK), working on the biostratigraphy, palaeoecology and palaeogeography of different fossil groups, in particular the enigmatic microfossil group of the acritarchs.

Past Chairman

David A.T. HarperDavid A.T. HARPER
Professor, Earth Sciences and Principal
Van Mildert College, Durham University
Durham DH1 3LE, UK
Tel: 44-1913347143

The subcommission is chaired by Prof. David Harper, a leading expert on major events in the history of life and numerical methods in palaeontology together with fossil brachiopods. He is Professor of Palaeontology in the Department of Earth Sciences, Principal of Van Mildert College and Deputy Head of Colleges (Research). He was previously Professor of Palaeontology and Head of Geology in the Natural History Museum of Denmark, University of Copenhagen. He is a Foreign Member of the Royal Danish Academy of Sciences and Letters, and an Einstein Professor in the Chinese Academy of Sciences. He has published over 10 books and monographs, including a couple of influential textbooks, as well as over 250 scientific articles and, together with Øyvind Hammer, the widely-used software package PAST. His research is mainly field-based and he has led expeditions to many parts of the world including central Australia, Chile, Greenland and Tibet. [See also]


Ian Percival Ian G. PERCIVAL
Principal Research Scientist (Palaeontologist)
Geological Survey of NSW, W.B. Clarke Geoscience Centre
947-953 Londonderry Rd, Londonderry 2753
New South Wales. AUSTRALIA
Tel: 61-2-4777-0315

Dr Ian Percival is the Senior Principal Research Scientist (Palaeontologist) in the Geological Survey of New South Wales, based in outer Sydney. The current primary emphasis of his work involves refining the Ordovician biostratigraphic framework across NSW, to support the regional mapping program of the Geological Survey. He has published widely on Early Palaeozoic brachiopods of Australia and New Zealand, concentrating on those in the Ordovician, with a focus on trimerellide and lingulate brachiopods. A second major area of research interest concerns conodonts (again mainly of Ordovician age), where he has been involved in study of faunas preserved in cherts as well as those more conventionally extracted from limestones. He has also dabbled in Ordovician molluscs (especially nautiloids).
Dr Percival has been Secretary of the Subcommission on Ordovician Stratigraphy since 2008, and edits the annual newsletter Ordovician News. He also is editor of the Association of Australasian Palaeontologists’ annual newsletter Nomen Nudum.


  • F.G. ACEÑOLAZA (Argentina)
  • G.L. ALBANESI (Argentina)
  • O. FATKA (Czech Republic)
  • M. GHOBADI POUR (Iran)
  • O. HINTS (Estonia)
  • A.T. NIELSEN (Denmark)
  • A. SA (Portugal)
  • T. TOLMACHEVA (Russia)
  • M. WILLIAMS (U.K.)
  • ZHAN Renbin (China)
  • ZHANG Yuandong (China)