Vol. 61, 2022
Macrobiotus naginae sp. nov., a New
Xerophilous Tardigrade Species from Rokua Sand Dunes (Finland)
Serge Ryndov1, Justine Chartrain1, and Sara Calhim1
of Biological and Environmental Science, University of Jyvaskyla, PO
Box 35, FI-40014 Jyvaskyla, Finland. *Correspondence: E-mail:
E-mail: email@example.com (Tommi); firstname.lastname@example.org
(Ryndov); email@example.com (Chartrain); firstname.lastname@example.org
2Institute of Systematics and Evolution of Animals,
Polish Academy of Sciences, Sławkowska 17, 31-016 Kraków, Poland.
E-mail: email@example.com (Stec)
3Department of Invertebrate Evolution, Institute of
Zoology and Biomedical Research, Faculty of Biology, Jagiellonian
University, Gronostajowa 9, 30-387 Kraków, Poland.
Received 19 November 2021 / Accepted
11 March 2022
Communicated by Benny K.K. Chan
that colonize soil show specific adaptations to soil. Compared to
closely related species living on the surface, the limbs of
soil-dwelling animals are often shortened, reduced, or absent to allow
a less restricted passage through cavities between soil particles. This
pattern of limb reduction has also been observed in tardigrades, where
multiple lineages that colonized the below-ground habitat show
independent reduction and/or loss of legs and claws. In the tardigrade
superfamily Macrobiotoidea, leg and claw reductions are a common trait
found in the Macrobiotus pseudohufelandi
complex. This rarely found species complex currently contains four
nominal taxa. Here we describe, with the use of integrative taxonomy, Macrobiotus naginae sp. nov., a new species in the Macrobiotus pseudohufelandi complex from inland sand dunes in Finland. We also provide a dichotomous key to the Macrobiotus pseudohufelandi complex to assist with their identification in future studies.
Key words: Tardigrada, Macrobiotus pseudohufelandi
complex, Sand dunes, Taxonomy, Systematics, Soil habitat.
Citation: Kim SL, Choi H, Eyun S, Kim D,
Yu OH. 2022. A new Branchipolynoe
(Aphroditiformia: Polynoidae) scale worm from the Onnuri deep-sea
hydrothermal vent field, northern Central Indian Ridge. Zool Stud 61:22. doi:10.6620/ZS.2022.61-22.
materials: Table S1丨Table S2丨Table S3丨Appendix 1丨Appendix
2丨Appendix 3丨Appendix 4丨Appendix 5丨Appendix 6