Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden
The tardigrade genus Richtersius Pilato & Binda, 1989 has been considered monotypic for more than 30 years since its establishment and is frequently used in experimental studies on physiological adaptations to stress. Only recently, integrative taxonomy has allowed us to disentangle and describ...
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Consortium of European Natural History Museums
2025-03-01
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| Series: | European Journal of Taxonomy |
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| Online Access: | https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2823 |
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| author | Matteo Vecchi Jakub Godziek Reinhardt M. Kristensen Lucia Piemontese Sara Calhim Daniel Stec |
| author_facet | Matteo Vecchi Jakub Godziek Reinhardt M. Kristensen Lucia Piemontese Sara Calhim Daniel Stec |
| author_sort | Matteo Vecchi |
| collection | DOAJ |
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The tardigrade genus Richtersius Pilato & Binda, 1989 has been considered monotypic for more than 30 years since its establishment and is frequently used in experimental studies on physiological adaptations to stress. Only recently, integrative taxonomy has allowed us to disentangle and describe different but similar species. In this study, we provide a taxonomic reanalysis of the genus Richtersius with an integrative description of two new species based on light and scanning electron microscopy as well as DNA sequencing of four markers (18S rDNA, 28S rDNA, ITS-2, and COI). Richtersius nicolai sp. nov. and Richtersius ingemari sp. nov. are distinguished from congeneric species based on a combination of pore density in newborn’s dorsal cuticle, egg diameters, placoid sizes and reproductive modes. This reanalysis of the genus Richtersius will facilitate the future descriptions of new species and provides a solid taxonomic background for the identification of the species used in experimental research.
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| format | Article |
| id | doaj-art-ab1b542211e14e69ba5c073c8cd5a199 |
| institution | DOAJ |
| issn | 2118-9773 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Consortium of European Natural History Museums |
| record_format | Article |
| series | European Journal of Taxonomy |
| spelling | doaj-art-ab1b542211e14e69ba5c073c8cd5a1992025-08-20T02:53:16ZengConsortium of European Natural History MuseumsEuropean Journal of Taxonomy2118-97732025-03-01981110.5852/ejt.2025.981.2823Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and SwedenMatteo Vecchi0Jakub Godziek1Reinhardt M. Kristensen2Lucia Piemontese3Sara Calhim4Daniel Stec5Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, 31-016, Kraków, PolandInstitute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, 31-016, Kraków, PolandNatural History Museum of Denmark, University of Copenhagen, Copenhagen, DenmarkIndependent researcher, Bologna, ItalyDepartment of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, FinlandInstitute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, 31-016, Kraków, Poland The tardigrade genus Richtersius Pilato & Binda, 1989 has been considered monotypic for more than 30 years since its establishment and is frequently used in experimental studies on physiological adaptations to stress. Only recently, integrative taxonomy has allowed us to disentangle and describe different but similar species. In this study, we provide a taxonomic reanalysis of the genus Richtersius with an integrative description of two new species based on light and scanning electron microscopy as well as DNA sequencing of four markers (18S rDNA, 28S rDNA, ITS-2, and COI). Richtersius nicolai sp. nov. and Richtersius ingemari sp. nov. are distinguished from congeneric species based on a combination of pore density in newborn’s dorsal cuticle, egg diameters, placoid sizes and reproductive modes. This reanalysis of the genus Richtersius will facilitate the future descriptions of new species and provides a solid taxonomic background for the identification of the species used in experimental research. https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2823new specieswater bearsmorphologyintegrative taxonomy |
| spellingShingle | Matteo Vecchi Jakub Godziek Reinhardt M. Kristensen Lucia Piemontese Sara Calhim Daniel Stec Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden European Journal of Taxonomy new species water bears morphology integrative taxonomy |
| title | Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden |
| title_full | Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden |
| title_fullStr | Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden |
| title_full_unstemmed | Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden |
| title_short | Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden |
| title_sort | taxonomic reanalysis of the genus richtersius tardigrada eutardigrada with description of two new species from italy and sweden |
| topic | new species water bears morphology integrative taxonomy |
| url | https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2823 |
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