Kaczmarek, L., Michalczyk, L. & Węglarska, B. 2002. Itaquascon mongolicus, a new species of Eutardigrada from Mongolia (Eutardigrada: Hypsibiidae). Genus Vol. 13 (1), Wrocław, 10 IV 2002: 1–3. (PDF)

2003

Michalczyk, L. & Kaczmarek, L. 2003. Water Bears (Tardigrada) of the Bieszczady Mountains (Poland, West Carpathians). Zootaxa 242: 1–24.

2004

Kaczmarek, L., Michalczyk, L. & Beasley, C.W. 2004. Milnesium katarzynae sp. nov., a new species of eutardigrade (Milnesiidae) from China. Zootaxa 743: 1–5.

2005

Michalczyk, L. & Kaczmarek, L. 2005. The first record of the genus Calohypsibius Thulin, 1928 (Eutardigrada: Calohypsibiidae) from Chile (South America) with a description of a new species Calohypsibius maliki. New Zealand Journal of Zoology 32(4): 287–292. [1]

2006

Kaczmarek, L. & Michalczyk, L. 2006. The Tardigrada Fauna of Mongolia (Central Asia) with a Description of Isohypsibius altai sp. nov. (Eutardigrada: Hypsibiidae). Zoological Studies 45(1): 11–23. full article (PDF). Reference page.

2007

Kaczmarek, L. & Michalczyk, L. 2007. A new species of Tardigrada (Eutardigrada: Milnesiidae): Milnesium krzysztofi from Costa Rica (Central America). New Zealand journal of zoology 34: 297–302. Abstract

2011

Bartels, P.J., Nelson, D.R., Kaczmarek, Ł. & Michalczyk, Ł. 2011. Ramazzottius belubellus, a new species of Tardigrada (Eutardigrada: Parachela: Hypsibiidae) from the Great Smoky Mountains National Park (North Carolina, U.S.A.). Proceedings of the Biological Society of Washington 124(1): 23–27. DOI: 10.2988/10-13.1 Reference page.

2015

Ciobanu, D.A., Roszkowska, M. & Kaczmarek, Ł. 2015: Two new tardigrade species from Romania (Eutardigrada: Milnesiidae, Macrobiotidae), with some remarks on secondary sex characters in Milnesium dornensis sp. nov. Zootaxa 3941(4): 542–564. DOI: 10.11646/zootaxa.3941.4.4. Preview Reference page.
Ciobanu, D.A., Roszkowska, M., Moglan, I. & Kaczmarek, Ł. 2015: The first record of Pyxidium tardigradum Van der Land, 1964 (Ciliophora) in Romania. Zootaxa 3941(4): 595–599. DOI: 10.11646/zootaxa.3941.4.10. Preview Reference page.
Kaczmarek, Ł., Bartels, P.J., Roszkowska, M. & Nelson, D.R. 2015. The Zoogeography of Marine Tardigrada. Zootaxa 4037(1): 1–189. DOI: 10.11646/zootaxa.4037.1.1 Preview (PDF). ISBN 978-1-77557-823-9 (paperback); ISBN 978-1-77557-824-6 (Online edition) Reference page.
Kaczmarek, Ł., Michalczyk, Ł. & McInnes, S.J. 2015: Annotated zoogeography of non-marine Tardigrada. Part II: South America. Zootaxa 3923(1): 1–107. DOI: 10.11646/zootaxa.3923.1.1.Reference page.
Londoño, R., Daza, A., Caicedo, M., Quiroga, S. & Kaczmarek, Ł. 2015: The genus Milnesium (Eutardigrada: Milnesiidae) in the Sierra Nevada de Santa Marta (Colombia), with the description of Milnesium kogui sp. nov. Zootaxa 3955(4): 561–568. DOI: 10.11646/zootaxa.3955.4.7. Preview (PDF) Reference page.
Stec, D., Smolak, R., Kaczmarek, Ł. & Michalczyk, Ł. 2015. An integrative description of Macrobiotus paulinae sp. nov. (Tardigrada: Eutardigrada: Macrobiotidae: hufelandi group) from Kenya. Zootaxa 4052(5): 501–526. DOI: 10.11646/zootaxa.4052.5.1. Preview (PDF) Reference page.
Roszkowska, M., Ostrowska, M. & Kaczmarek, L. 2015. The genus Milnesium Doyère, 1840 (Tardigrada) in South America with descriptions of two new species from Argentina and discussion of the feeding behaviour in the family Milnesiidae. Zoological Studies 54(12): 1-17. full article (PDF). Reference page.

2016

Kaczmarek, Ł., Michalczyk, Ł. & McInnes, S.J. 2016. Annotated zoogeography of non-marine Tardigrada. Part III: North America and Greenland. Zootaxa 4203(1): 1–249. DOI: 10.11646/zootaxa.4203.1.1. Reference page.
Kaczmarek, Ł. & Roszkowska, M. 2016. A new eutardigrade from Costa Rica with taxonomical and zoogeographical remarks on Costa Rican tardigrades. New Zealand journal of zoology, 43(3): 234–245. DOI: 10.1080/03014223.2016.1156553 . Reference page.
Roszkowska, M., Stec, D., Ciobanu, D.A. & Kaczmarek, Ł. 2016. Tardigrades from Nahuel Huapi National Park (Argentina, South America) with descriptions of two new Macrobiotidae species. Zootaxa 4105(3): 243–260. DOI: 10.11646/zootaxa.4105.3.2. Reference page.
Stec, D., Morek, W., Gąsiorek, P., Kaczmarek, Ł. & Michalczyk, Ł. 2016. Determinants and taxonomic consequences of extreme egg shell variability in Ramazzottius subanomalus (Biserov, 1985) (Tardigrada). Zootaxa 4208(2): 176–188. DOI: 10.11646/zootaxa.4208.2.5. Reference page.
Zawierucha, K., Kolicka, M. & Kaczmarek, L. 2016. Re-description of the Arctic tardigrade Tenuibiotus voronkovi (Tumanov, 2007) (Eutardigrada; Macrobiotidea), with the first molecular data for the genus. Zootaxa 4196(4): 498–510. DOI: 10.11646/zootaxa.4196.4.2. Reference page.

2017

Kaczmarek, Ł. & Michalczyk, Ł. 2017. A description of Macrobiotus horningi sp. nov. and redescriptions of M. maculatus comb. nov. Iharos, 1973 and M. rawsoni Horning et al., 1978 (Tardigrada: Eutardigrada: Macrobiotidae: hufelandi group). Zootaxa 4363(1): 79–100. DOI: 10.11646/zootaxa.4363.1.3 Reference page.
Kaczmarek, Ł. & Michalczyk, Ł. 2017. The Macrobiotus hufelandi group (Tardigrada) revisited. Zootaxa 4363(1): 101–123. DOI: 10.11646/zootaxa.4363.1.4 Reference page.
McInnes, S.J., Michalczyk, Ł. & Kaczmarek, Ł. 2017. Annotated zoogeography of non-marine Tardigrada. Part IV: Africa. Zootaxa 4284(1): 1–74. DOI: 10.11646/zootaxa.4284.1.1. Full article (PDF) ISBN 978-1-77670-166-7 (paperback); ISBN 978-1-77670-167-4 (Online edition) Reference page.

2018

Marley, N.J., Kaczmarek, L., Gawlak, M., Bartels, P.J., Nelson, D.R., Roszkowska, M., Stec, D. & Degma, P. 2018. A clarification for the subgenera of Paramacrobiotus Guidetti, Schill, Bertolani, Dandekar and Wolf, 2009, with respect to the International Code of Zoological Nomenclature. Zootaxa 4407(1): 130–134. DOI: 10.11646/zootaxa.4407.1.9 Reference page.

2019

Kaczmarek, L., Grobys, D., Kulpa, A., Bartylak, T., Kmita, H., Kepel, M., Kepel, A. & Roszkowska, M. 2019. Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar. ZooKeys, 884: 1–22. DOI: 10.3897/zookeys.884.29469 Reference page.