IX International Symposium on Tardigrada

The congress was attended by 48 researchers from 10 countries from four continents (Asia, Europe, North, Central & South America). During the three days of the conference 26 talks and 26 posters were presented.

So far, this was the third time that a tardigrade meeting took place in the USA, making it (along Italy) the top country for the number of tardigrade conferences. It was also the first Symposium in the XXI century.

Table of contents

Group photo


The Symposium logo, designed by Dr. W. Randy Miller (Chestnut Hill College), shows three tardigrades (Macrobiotus sp., Batillipes sp. and Echiniscus sp.) crawling on a replicating DNA strand.


28 July 2003 - 01 August 2003.


Saint Pete Beach, Florida, USA.

World Map from Wikipedia.


The Tradewinds Sirata Hotel.


Dr. James R. Garey (University of South Florida, USA),
Dr. P. Brent Nichols (University of South Florida, USA),
Dr. Frank A. Romano III (Jacksonville State University, USA),
Dr. W. Randy Miller (Chestnut Hill College, USA).

Participants (alphabetically)

 Abe, Wataru (Japan)
 Altiero, Tiziana (Italy)
 Avdonina, Alexandra (Russia)
 Bartels, Paul (USA)
 Bateman, Lois (Canada)
 Beasley, Clark (USA)
 Bertolani, Roberto (Italy)
 Blaxter, Mark (UK)
 Boeckner, Matthew (Canada)
 Collins, Michael (Canada)
 D'Addabbo, Gallo (Italy)
 DaFoe, Robert (USA)
 Daub, Jennifer (UK)
 Dewel, Ruth (USA)
 Eibye-Jacobsen, Jette (Denmark)
 Fernandez, Maria (Argentina)
 Garey, James (USA)
 Guidetti, Roberto (Italy)
 Guldberg, Jesper Hansen (Denmark)
 Harada, Hiroki (Japan)
 Heiner, Iben (Denmark)
 Helm, Richard (USA)
 Herrera-Vasquez, Jonnathan (Costa Rica)
 Hinton, Juliana (USA)
 Hohl, Amber (USA)
 Horikawa, Daiki (Japan)
 Jerez-Jaimes, Javier (Puerto Rico)
 Klage, Karsten (USA)
 Kristensen, Reinhardt M. (Denmark)
 Marley, Nigel (UK)
 Maroon, Habib (UK)
 Marshall, Mary (USA)
 Marshall, Clayton (USA)
 Meyer, Harry (USA)
 Miller, William (USA)
 Mitchell, Colleen (USA)
 Narvaez-Parra, Eliana (Puerto Rico)
 Nelson, Diane R. (USA)
 Nichols, Brent (USA)
 Ray, Maggie (USA)
 Rebecchi, Lorena (Italy)
 Regier, Jerome (USA)
 Rocha, Alejandra (Argentina)
 Romano, Frank (USA)
 Suzuki, Atsushi (Japan)
 Thomas, Frances (UK)
 Trygvadottir, Birna (Denmark)
 Young, James (USA)

Group photo

Photo by B. Higgins.



Sunday (27.07.2003)
18:00-20:00 Welcome Social at the Beachfront Breezeway


Monday (28.07.2003)
SESSION 1: Welcome (Mediterranean Palm)
09:00-09:10 J. Garey, Symposium Committee Chair
09:10-09:30 S. Schneider, Associate Dean of Research, USF
09:30-10:30 Opening Lecture:
D.R. Nelson
Tardigrade Research: Where Have We Been? Where Are We Going?
10:30-11:00 Morning break (Mediterranean Palm)
SESSION 2: Phylogeny (Mediterranean Palm)
11:00-12:00 J. Reiger  
12:00-13:30 Lunch (Royal Palm)
13:30-14:00 M. Blaxter, B. Elsworth, J. Daub, H. Maroon, A. Aboobaker & F. Thomas Molecular phylogenetics of the Tardigrada and an investigation of the position of tardigrades in animal phylogeny
14:00-14:30 J. Eibye-Jacobsen & R.A. Dewel Three dimensional understanding of the foremost section of the buccal apparatus of Echiniscus viridissimus Peterfi, 1956 (Heterotardigrada)
14:30-15:00 R. Dewel & J. Eibye-Jacobsen Origin and Diversification of the Arthropods: New Interpretations of Some Old Characters
15:00-15:30 Afternoon break (Mediterranean Palm)
15:30-16:00 R. Guidetti, A. Gandolfi, V. Rossi & R. Bertolani. Phylogenetic relationships in Macrobiotidae (Tardigrada). II. Molecular (mtDNA) and morphological approaches
16:00-16:30 P.B. Nichols, D.R. Nelson & J.R. Garey Family Values: A Cladistic Analysis of the Tardigrada


Tuesday (29.07.2003)
SESSION 1: Life History – Temperate (Mediterranean Palm)
09:00-09:30 T. Altiero, L. Rebecchi, R. Bertolani Phenotypic life history variations in two clones of Macrobiotus richtersi
09:30-10:00 H.A. Meyer Distribution of Terrestrial Tardigrades in the State of Florida
10:00-10:30 N. Marley Preliminary Results from a Study on Ecuadorian Tardigrada
10:30-11:00 Morning break (Mediterranean Palm)
11:00-11:30 J. Hinton, H.A. Meyer & K. Trahan Seasonal and Spatial Variation in Tardigrade Diversity in Leaf Litter from Florida and Louisiana
11:30-12:00 P.J. Bartels & D.R. Nelson A Large-scale, Multi-Habitat Inventory of Tardigrades in the Great Smoky Mountains National Park
12:00-13:30 Lunch (Royal Palm)
SESSION 2: Poster session I (Sabal - Canary Palm)
15:00-15:30 Afternoon break (Mediterranean Palm)
15:30-... Free time/Late additions


Wednesday (30.07.2003)
SESSION 1: Life History – Polar and Sub-polar (Mediterranean Palm)
09:30-10:00 M. Collins, M. Boeckner & L. Bateman A Preliminary Account of Tardigrades of Labrador, Canada
10:00-10:30 R. Miller & H.F. Heatwole Tardigrades of the Sub-Antarctic: 5000 year old eggs from Marion Island
10:30-11:00 Morning break (Mediterranean Palm)
11:00-11:30 J. Hansen, A.K. Katholm & R.M. Kristensen A Study on the Genus Amphibolus from Disko Island, Greenland, with Special Attention on the Life Cycle of Amphibolus nebulosus (Eutardigrada: Eohypsibiidae)
11:30-12:00 M. Boeckner, M. Collins, & L. Bateman Factors Affecting the Ecology of Tardigrada in Labrador, Canada with Relation to Elevation, Latitude, Seasonality, and Desiccation Tolerance
12:00-13:30 Boxed lunch
12:00-... Bush gardens


Thurday (31.07.2003)

SESSION 1: Life History – Marine (Mediterranean Palm)
09:30-10:00 T.M. Boesgaard & R.M. Kristensen The Tardigrade Fauna of Two Australian Marine Caves With Descriptions of Six New Species of Arthrotardigrada
10:00-10:30 I. Heine & R.M. Kristensen A Revision of the Marine Genus Orzeliscus, Arthrotardigrada, Tardigrada
10:30-11:00 Morning break (Mediterranean Palm)
11:00-11:30 R. Kristensen Extreme Secondary Sexual Dimorphism in the Genus Florarctus (Arthrotardigrada: Halechiniscidae)
11:30-12:00 C. Beasley, L. Kaczmarek & L. Michalczyk Additions to the Tardigrada Fauna of Chin
12:00-13:30 Lunch (Royal Palm)
SESSION 2: Poster session II (Sabal - Canary Palm)
15:00-15:30 Afternoon break (Mediterranean Palm)
SESSION 3: Taxonomy & Methods (Mediterranean Palm)
15:30-16:00 H. Maroon, A. Aboobaker, F. Thomas, J. Daub & M. Blaxter Adult and Embryonic Anatomy of Hypsibius dujardini
16:00-16:30 W.R. Miller & Z.H. Johnson Auto-Montage Imaging for Tardigrades
16:30-17:00 J. Herrera-Vásquez Tardigrades Density and Diversity in Four Life Zones of Costa Rica


Friday (01.08.2003)

SESSION 1: Phisiology (Mediterranean Palm)
09:00-10:00 R.F. Helm, K. Klage & M. Potts Tardigrades and Biomimetic Cell Stabilization
10:00-10:30 L. Rebecchi, R. Guidetti, S. Borsari, T. Altiero & R. Bertolani Long-term Anhydrobiotic Survival of Lichen-dwelling Tardigrades
10:30-11:00 Morning break (Mediterranean Palm)
11:00-12:00 R. Guidetti, D. Boschini, L. Rebecchi & R. Bertolani Encystment in Eutardigrades: Differences and Common Traits in Two Evolutionary Lines
12:00-13:00 Open forum
12:00-13:30 Lunch (Royal Palm)



Tuesday (29.07.2003)
W. Abe Semiterrestrial Tardigrades form Sakhalin Island, Far East Russia
J. Daub, F. Thomas, H. Maroon, A. Aboobaker & M. Blaxter Genomic Resources for the Tardigrade Hypsibius dujardini
P. Degma & M. Pecalkova The Ecological Distribution of Tardigrada in National Nature Reserve Stuzica (Bukovske vrchy Mts, NE Slovakia)
M.L. Fernandez, J.R. Peluffo & C.M. de Peluffo Population Dynamics of Dactylobiotus grandipes Schuster et al., 1977 (Tardigrada) in a Neotropical Eutrophic Pond
R. Guidetti, T. Altiero & R. Guidetti Dactylobiotus octavi n. sp. (Eutardigrada; Macrobiotidae) from Disko Island
J.G. Hansen & R.M. Kristensen The “Hyena Female” within the Marine Tardigrada with the Description of Two New Species of Megastygarctides (Arthrotardigrada: Stygarctidae) from Saudi Arabia
N.J. Marley, R. Bertolani & D.R. Nelson Designation of Pseudobiotus kathmanae Nelson (Tardigrada) as the Type Species of Pseudobiotus Nelson
D. Horikawa, W. Abe & S. Higashi The Effects of Prehydration on the Anhydrobiotic Survival in the Tardigrade Milnesium tardigradum
J. Jerez-Jaimes Tardigrades in Six Phorophytes of the Moss Calymperes tenerum C. Muller
E.X. Narvaea & J. Jerez-Jaimes Tardigrade Community Composition in Four Forest Types in the El Divisio Reserve, (Santander, Colombia)
A. Suzuki Oogenesis of Milnesium tardigradum
S. McInness & P. Convey Exceptional, Tardigrade Dominated Ecosystems in Ellsworth Land, Antarctica
D. Sucharski & W.R. Miller Tardigrades of North America: Southeastern Pennsylvania



Thursday (31.07.2003)

L. Kaczmarek & L. Michalczyk Milnesium katarzynae sp. nov., a New Species of Eutardigrade from China
H. Harada & M.T. Ito The response of Soil-Inhabiting Tardigrade Communities to Various Forests in the Southern Part of Kanagawa Prefacture
N. Marley Tardigrades of Southwest England, United Kingdom. A Long-term, Multi-habitat Survey from the Coastal Urban Habitats to the Upland Moors
C. Marshall A Comparative Study of Souther Indiana Urban and Rural Tardigrade Populations Due to Seasonal Environmental pH Changes
H.A. Meyer Small-scale Spatial Variability in Terrestrial Tardigrade Populations
M.M. de Peluffo, J.R. Peluffo, A.M. Rocha & I.L. Doma Tardigrade Distributions in a Medium-sized City of Central Argentina
L. Rebecchi, G. Rinaldi & T. Altiero Resting Eggs in Tardigrades
F. Thomas, J. Daub, H. Maroon, A. Aboobaker & M. Blaxter Establishment of a Culture System for and Lifecycle Dynamics of the Tardigrade Hypsibius dujardini
B. Trygvadottir Tardigrades of the Faroe Islands
K. Klage, R.F. Helm, J.D. Eisenback, R. Dewel, R. Bertolani & M. Potts Tardigrades – Understanding Dessication Tolerance
S. McInness Tardigrade faunaof Sub-Antarctic Marion Island in the Prince Edward Archipelago, South Indian Ocean – A Preliminary Report
S. McInness & P. Convey Tardigrade Fauna of the South Sandwich Islands
W.R. Miller Tardigrades of North America: Central Park, New York City, New York, U.S.A.



The Symposium talks have been published in a special volume of 'Hydrobiologia'. The volume contains 14 scientific papers on tardigrade morphology, taxonomy, phylogeny, biogeography, ecology and physiology. The symposium proceedings are dedicated to Nigel Marley.

(The International Journal of Aquatic Sciences)

vol. 558(1), 2006

Proceedings of the Ninth International Symposium on Tardigrada

James R. Garey, Diane R. Nelson & P. Brent Nichols
(Guest Editors)





(click paper titles to open full texts in PDF)



Table of contents.  
Garey, J.R. The biology of tardigrades: an introduction to the 9th international symposium on Tardigrada.  1-3
Pilato, G., Bertolani, R., Binda, M.G., Guidetti, R., Lisi, O. & Rebecchi, L. Tenth International Symposium on Tardigrada. 5
Guidetti, R., Boschini, D., Rebecchi, L. & Bertolani, R. Encystment processes and the ‘‘Matrioshka-like stage’’ in a moss-dwelling and in a limnic species of eutardigrades (Tardigrada). 9-21


Rebecchi, L., Guidetti, R., Borsari, S., Altiero, T. & Bertolani, R. Dynamics of long-term anhydrobiotic survival of lichen-dwelling tardigrades. 23-30
Morphology and Phylogeny



Altiero, T., Rebecchi, L. & Bertolani, R. Phenotypic variations in the life history of two clones of Macrobiotus richtersi (Eutardigrada, Macrobiotidae).

Dewel, R.A. & Eibye-Jacobsen, J. The mouth cone and mouth ring of Echiniscus viridissimus Peterfi, 1956 (Hetero­tardigrada) with comparisons to corresponding structures in other tardigrades. 41-51
Nichols, P.B., Nelson, D.R. & Garey, J.R. A family level analysis of tardigrade phylogeny. 53-60

Suzuki, A.C. Ovarian structure in Milnesium tardigradum (Tardigrada, Milnesiidae) during early vitellogenesis.






New Species




Guidetti, R., Altiero, T. & Hansen, J.G. A new species of freshwater tardigrades from Disko Island (Greenland)increases an unsolved paradox in tardigrade systematics.  69-79
Guldberg, H.J. & Kristensen, R.M. The ‘hyena female’ of tardigrades and descriptions of two new species of Megastygarctides (Arthrotardigrada: Stygarctidae) from Saudi Arabia. 81-101


Community Structure and Ecology




Avdonina, A.M. Tardigrade fauna of the region between Oka and Volga rivers (Russia) and patterns of their distribution in substrates and habitats. 105-109
Bartels. P.J. & Nelson, D.R. A large-scale, multihabitat inventory of the Phylum Tardigrada in the Great Smoky Mountains National Park, USA: a preliminary report. 111-118
Harada, H. & Ito, M.T. Soil-inhabiting tardigrade communities in forests of Central Japan. 119-127


Short Research Notes




Meyer, H.A. Interspecific association and substrate specificity in tardigrades from Florida, Southeastern United States. 129-132
Meyer, H.A. Small-scale spatial distribution variability in terrestrial tardigrade populations. 133-139
de Peluffo, M.C.M., Peluffo, J.R., Rocha, A.M. & Doma, I.L. Tardigrade distribution in a medium-sized city of central Argentina. 141-150



By Jim Garey.


By Jim Garey.

If you have more photos from the Symposium and you would like to share them with others, please send them to us and we will put them on the website.










Copyright by £ukasz Michalczyk (2004-2022)