Collaborations                                                                                                 
03-2014–present: Dr. Marie Abboud-Abi Saab, National Center for Marine Sciences, Batroun, Lebanon (tintinnid fossils).
09-2014–present: Dr. Undine Achilles-Day, Scottish Marine Institute, Scottish Association of Marine Science, Oban, Argyll, UK (standards in species descriptions).
09-2014–present: Dr. Erna Aescht, Biology Center, Upper Austrian Museum, Linz, Austria (standards in species descriptions).
04-2014–present: Dr. Viviana A. Alder, Instituto de Ecología, Genética y Evolución de Buenos Aires, Universidad de Buenos Aires, Buenos Aires, Argentina.
09-2014–present: Prof. Khaled A.S. Al-Rasheid, College of Science, King Saud University, Riyad, Saudi Arabia (standards in species descriptions).
04-2014–present: Dr. Charles Bachy, Monterey Bay Aquarium Research Institute, Moss Landing, CA, USA (phylogeny of tintinnid ciliates).
03-2002–present: Dr. Alfred Beran, Istituto Nazionale di Oceanografia e di Geo­fisica Speri­mentale, Trieste, Italy (biodiver­sity and cultivation of marine planktonic ciliates).
03-2014–present: Dr. María Sonia Barría de Cao, Instituto Argentino de Oceanografía, Bahía Blanca, Argentina (tintinnid fossils).
01-1998–present: Dr. Helmut Berger, Consulting Engineering Office for Ecology, Salzburg, Austria (tintinnid fossils).
03-2014–present: Dr. William A. Bourland, Department of Biological Sciences, Boise State University, Boise, ID, USA (tintinnid fossils).
03-2014–present: Dr. Joong Ki Choi, Department of Oceanography, Inha University, Incheon, Korea (tintinnid fossils).
2005–2006: Dr. Anne Chao, National Tsing Hua University, Hsin-Chu, Taiwan (esti­ma­tion of soil ciliate diversity).
09-2014–present: Prof. John Clamp, Dept. Biology, North Carolina Central University, Durham, USA (standards in species descriptions).
04-2009–present: Dr. Wayne Coats, Smithsonian Environmental Research Center, Edge­water, Maryland, USA (biodiversity of marine cili­ates and their dino­flag­ellate parasites).
09-2014–present: Dr. John G. Day, Scottish Marine Institute, Scottish Association of Marine Science, Oban, Argyll, UK (standards in species descriptions).
03-2014–present: Dr. Mary Doherty, Department of Biology, Rhodes College, Memphis, TN, USA (tintinnid fossils).
05-2008–present: Dr. John Dolan, Labora­toire d’Océanographie, Station Zoologique, CNRS Université Pierre et Marie Curie-Paris 6, Villefranche-sur-Mer, France (bio­diversity of marine tintinnid ciliates).
11-2010–present: Dr. Micah Dunthorn, Department of Ecol­ogy, University of Kaiserslau­tern, Kaiserslautern, Germany (phylogeny of cili­ates, tintinnid fossils).
01-2010–01-2012: Dr. Hermann Ehrlich, Institute for Bioanalytical Chemistry, University of Technology Dresden, Dresden, Germany (chemical analyses of tintinnid structures).
09-1995–2009: Prof. Dr. Malte Elbrächter, Deutsches Zentrum für Marine Bio­diversi­täts­forschung, Wattenmeerstation Sylt, Sylt, Germany (bio­diversity of marine planktonic ciliates).
09-2014–present: Dr. Genoveva Esteban, Faculty of Science and Technology, Bournemouth University, Dorset, UK (standards in species descriptions).
01-1998–2013: Prof. Dr. Wilhelm Foissner, Department of Organ­is­mic Biology, Univer­sity of Salzburg, Salzburg, Austria (taxonomy and phylogeny of ciliates).
09-2014–present: Prof. Dr. Mona Hoppenrath, Senckenberg am Meer, German Centre for Marine Biodiversity Research, Wilhelmshaven, Ger­many (dinoflagellate parasites in ciliates)
03-2014–present: Dr. Feng Gao, Laboratory of Protozoology, Ocean University of China, Qingdao, China (tintinnid fossils).
03-2014–present: Dr. Eleni Gentekaki, Department of Biology, Chulalongkorn University, Bangkok, Thailand (tintinnid fossils).
08-2014–present: Dr. Jun Gong, Yantai Institute of Coastal Zone Research, Chinese Acad­emy of Science, Yantai 264003, China (phylogeny of tintinnids).
09-2014–present: Dr. Renu Gupta, Maitreyi College, University of Delhi, New Delhi, India (standards in species descriptions).
03-2014–present: Dr. Xiaozhong Hu, Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, China (standards in species descriptions, tintinnid fossils).
03-2014–present: Dr. Jie Huang, Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Wuhan, China (tintinnid fossils).
03-2014–present: Dr. Matthew D. Johnson, Woods Hole Oceanographic Institution, Woods Hole, MA , United States of America (tintinnid fossils).
04-2013–present: Dr. Jae-Ho Jung, South Sea Environment Research Division, Korea Institute of Ocean Science and Technol­ogy, Geoje, Korea (taxonomy and phylogenetic relationships of Oligotrichea).
2011–present: Dr. Takashi Kamiyama, Tohoku National Fisheries Research Institute, Fisheries Research Agency, Japan (tintinnid fossils).
03-2014–present: Dr. Barbara Kammerlander, Research Institute for Limnology, University of Innsbruck, Mondsee, Austria (tintinnid fossils).
09-2014–present: Prof. Komal Kamra, SGTB Khalsa College, University of Delhi, Delhi, India (standards in species descriptions).
03-2002–present: Prof. Dr. Laura Katz, Department of Biological Sci­ences, Smith College, Northampton, USA (phylogeny of Oligotrichea).
03-2014–present: Dr. Sun Young Kim, Resources Research Division, The National Institute of Marine Biological Resources Planning Bureau, Ministry of Oceans and Fisheries, South Korea (tintinnid fossils).
04-2013–present: Dr. Young-Ok Kim, Korea Institute of Ocean Science and Technol­ogy, Geoje, South Korea (taxonomy and phylogenetic relationships of Oligotrichea).
09-2014–present: Dr. Antonietta La-Terza, School of Bioscience and Veterinary Medicine, University of Camerino, Camerino, Italy (standards in species descriptions).
2004–present: Prof. Dr. Otto Larink, University of Technology Braunschweig, Depart­ment of Evolution Biology, Braun­schweig, Ger­many (illustrated guide to coastal plankton or­gan­isms).
2011–present: Dr. Michele Laval-Peuto, Villefranche-sur-mer, France (morpho­logic investigations of tintinnids).
04-2013–present: Mag. Eun Sun Lee, Department of Biological Sci­ence, University of Ulsan, Republic of Korea (taxonomy and phylogenetic relation­ships of Oligo­trichea).
09-2014–present: Prof. Diane Lipscomb, Department of Biological Sciences, George Washington University, Washington DC, USA (standards in species descriptions).
03-2014–present: Prof. Dr. Jere Lipps, John D. Cooper Archaeology and Paleontology Cen­ter, Santa Ana, CA, USA (tintinnid fossils).
03-2014–present: Dr. Christopher S. Lobban, Division of Natural Sciences, University of Guam, Mangilao, Guam, United States of America (tintinnid fossils).
03-2014–present: Dr. Hongan Long, Department of Biology, Indiana University, Bloomington, IN, United States of America (tintinnid fossils).
09-2014–present: Prof. Pierangelo Luporini, Lab of Eukaryotic Microbiology and Animal Biology, University of Camerino, Camerino, Italy (standards in species descriptions).
05-2003–present: Prof. Dr. Denis H. Lynn, Department of Zool­ogy, University of British Columbia, Vancouver, Canada (tintinnid fossils, phylogeny of Oligotrichea).
09-2014–present: Dr. Miroslav Macek, Universidad Nacional Autonoma de Mexico, Tlalnepantla, Mexico (standards in species descriptions).
03-2014–present: Dr. Robert I. Mansergh, Institute of Marine Sciences, University of Portsmouth, United Kingdom (tintinnid fossils).
03-2014–present: Dr. Mercedes Martín-Cereceda, Departamento de Microbiología III, Ciudad Universitaria, Madrid, Spain (tintinnid fossils).
08-2010–present: Dr. George McManus, Univ. Connecticut, Department of Marine Sciences, Groton, USA (tintinnid fossils, biodiversity of marine tintinnid ciliates).
09-2002: Dr. Monica Modigh, Stazione Zoologica ‘Anton Dohrn’, Naples, Italy (inves­tiga­tion of biodiversity in marine planktonic ciliates).
05-2002–present: Dr. David J. S. Montagnes, School of Bio­logical Sci­ences, University of Liverpool, Liverpool, UK (tintinnid fossils, biodiver­sity of marine planktonic cili­ates).
2007–2011: Dr. Helga Müller, Private Laboratory, Konstanz, Germany (ultra­struc­ture of resting cysts in Oligotrichea).
03-2014–present: Dr. Geoffrey O. Ong’ondo, Department of Biological Sciences, Egerton University, Egerton, Kenya (tintinnid fossils).
09-2014–present: Prof. David Patterson, School of Biological Sciences, University of Sydney, Australia (standards in species descriptions).
09-2014–present: Dr. Blanca Perez-Uz, Dept. Microbiologia, Universidad Complutense de Madrid, Madrid, Spain (standards in species descriptions).
03-2014–present: Dr. Pablo Quintela-Alonso, Department of General Ecology, Cologne Biocenter, University of Cologne, Cologne, Germany (tintinnid fossils).
1991–2006: Dr. Jeannette Cornelie Riedel-Lorjé, Institut für Frischwasser- und Abwas­serbiologie, Hamburg, Germany (biodiversity and seasonal distri­bution of planktonic ciliates in marine and brackish coastal wa­ters).
04-2014–present: Dr. Alessandro Saccà, Dipartimento di Scienze Biologiche e Ambientali, Università degli Studi di Messina, Messina, Italy (standards in tintinnid descriptions).
03-2014–present: Dr. Lúcia S. L. Safi, Virginia Institute of Marine Science, The College of William & Mary, VA, United States of America (tintinnid fossils).
04-2014–present: Dr. Luciana Santoferrara, Department of Marine Sciences, Univer­sity of Connecticut, CT, USA (standards in tintinnid descriptions).
04-2013–present: Prof. Mann Kyoon Shin, Department of Biologi­cal Science, University of Ulsan, Republic of Korea (taxonomy and phyloge­netic relationships of Oligotrichea).
01-2010–present: Dr. Paul Simon, Max Planck Institute for Chemical Physics of Sol­ids, Dres­den, Germany (ultrastructural analyses of tintinnid lori­cae).
09-2014–present: Prof. Weibo Song, Laboratory of Protozoology, Institute of Evolution and Marine Biodiversity, Ocean University, Qingdao, China (standards in species descriptions).
03-2014–present: Dr. Bettina Sonntag, Research Institute for Limnology, University of Innsbruck, Mondsee, Austria (tintinnid fossils).
2010–present: Prof. Dr. Thorsten Stoeck, Department of Ecol­ogy, University of Kaisers­lautern, Kaiserslautern, Germany (phylogeny of colpodid cili­ates; taxonomy of euplotid ciliates).
2011–present: Dr. Diane Stoecker, Horn Point Laboratory, University of Maryland, Mary­land, USA (tintinnid fossils, ecology and biodiversity of tintinnids).
05-2003–present: Dr. Michaela C. Strüder-Kypke, Department of Molecu­lar and Cellular Biology, University of Guelph, Guelph, Canada (phylogeny of Oligo­trichea).
03-2014–present: Dr. Isabelle Trautmann, Department of Ecology, University of Kaiserslautern, Kaiserslautern, Germany (tintinnid fossils).
2007–2008: Dr. Sheng-Fang Tsai, Insti­tute of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung (taxonomy and ultrastructure of Oligotrichea).
03-2014–present: Dr. Laura R.P. Utz, Faculty of Biosiences, Pontifícia Universidade Católica do Rio Grande do Sul, Rio Grande do Sul, Brazil (tintinnid fossils).
03-2014–present: Dr. Peter Vd’ačný, Department of Zoology, Comenius University, Bratislava, Slovak Republic (tintinnid fossils).
09-2014–present: Dr. Adriana Vallesi, Lab of Eukaryotic Microbiology and Animal Biology, University of Camerino, Camerino, Italy (standards in species descriptions).
09-2014–present: Dr. Alan Warren, Dept. Life Sciences, Natural History Museum, London, UK (standards in species descriptions).
03-2014–present: Dr. Thomas Weisse, Research Institute for Limnology, University of Innsbruck, Mondsee, Austria (tintinnid fossils).
03-2014–present: Dr. Stephen A. Wickham, Department of Organismic Biology, University of Salzburg, Austria (tintinnid fossils).
03-2014–present: Dr. Wuchang Zhang, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China (tintinnid fossils).
04-2013–present: Dr. Dapeng Xu, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China (taxonomy and phyloge­netic relationships of Oligotrichea).
04-2014–present: Dr. Zhenzhen Yi, School of Life Science, South China Normal University, Guangzhou, China (tintinnid fossils).
03-2014–present: Dr. Zifeng Zhan, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China (tintinnid fossils).
03-2014–present: Prof. Rebecca Zufall, Department of Biology and Biochemistry, University of Houston, Houston, TX, United States of America (tintinnid fossils).