Integrative taxonomy supports the description of two new species of Macrobiotidae (Tardigrada, Eutardigrada) from Kristianstads Vattenrike Biosphere Reserve in Sweden
Author
Hulterström, Jens
Department of Zoology, Swedish Museum of Natural History, Box 50007, 104 05 Stockholm, Sweden.
jens.hulterstrom15@gmail.com
Author
Guidetti, Roberto
Department of Life Sciences, University of Modena and Reggio Emilia, 41124 Modena, Italy.
roberto.guidetti@unimore.it
Author
Jönsson, K. Ingemar
Department of Environmental Science, Kristianstad University, SE- 291 88 Kristianstad, Sweden.
ingemar.jonsson@hkr.se
Author
Atherton, Sarah
Department of Zoology, Swedish Museum of Natural History, Box 50007, 104 05 Stockholm, Sweden.
sarah.atherton@nrm.se
text
European Journal of Taxonomy
2025
2025-12-08
1030
1
52
https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3135/13991
journal article
313536
10.5852/ejt.2025.1030.3135
0e837015-e9de-4bbe-92b1-4fbb915238a4
2118-9773
17962351
60D8486F-0A30-423A-832B-3B5BF58C20ED
Table 1. Morphometric data for selected morphological characters of the new species, including the number of specimens measured (n), range of the absolute measurements (µm) and the range of the measurements relative to the buccal tube length (pt). | M. vattenrikenses sp. nov. | P. marchelmoni sp. nov. |
|---|
| n | µm | pt | n | µm | pt |
|---|
| Body length | 7 | 335–530 | 798–1233 | 16 | 238–710 | 528–1726 |
|---|
| Bucco-pharyngeal apparatus |
|---|
| -Buccal tube length | 10 | 36.0–43.0 | – | 15 | 34.7–61.0 | – |
|---|
| -Stylet support insertion | 10 | 27.0–34.6 | 75.0–81.0 | 14 | 25.8–46.1 | 72.3–80.6 |
|---|
| -Buccal tube external width | 10 | 6.1–9.0 | 16.7–20.9 | 12 | 6.7–14.5 | 18.1–23.8 |
|---|
| -Buccal tube internal width | 10 | 4.1–5.3 | 10.1–13.9 | 12 | 3.6–11.4 | 9.6–18.8 |
|---|
| -Ventral lamina length | 8 | 22.0–26.1 | 58.1–61.1 | 13 | 22.5–38.0 | 53.2–75.2 |
|---|
| Placoid lengths |
|---|
| -Macroplacoid 1 | 10 | 8.4–10.6 | 21.4–27.8 | 13 | 5.3–11.5 | 13.0–20.0 |
|---|
| -Macroplacoid 2 | 10 | 6.2–9.0 | 16.7–20.9 | 13 | 4.0–11.0 | 11.5–22.4 |
|---|
| -Macroplacoid 3 | – | – | – | 13 | 7.5–17.9 | 18.3–29.4 |
|---|
| -Microplacoid | 9 | 3.1–5.0 | 8.6–11.6 | 14 | 2.5–5.0 | 6.7–10.0 |
|---|
| -Macroplacoid row | 10 | 14.3–22.0 | 37.1–52.8 | 13 | 19.5–46.0 | 52.1–75.7 |
|---|
| -Placoid row | 9 | 18.4–26.0 | 48.5–66.7 | 13 | 25.2–57.9 | 69.5–95.2 |
|---|
| Claw I lengths |
|---|
| -External primary | 8 | 10.1–11.8 | 26.2–30.6 | 12 | 8.0–14.0 | 16.0–27.7 |
|---|
| -External secondary | 8 | 8.1–11.5 | 21.7–27.8 | 10 | 9.0–12.7 | 18.8–23.5 |
|---|
| -Internal primary | 7 | 9.0–11.9 | 24.9–30.6 | 11 | 10.0–13.6 | 18.9–27.5 |
|---|
| -Internal secondary | 6 | 7.0–10.0 | 19.4–27.8 | 9 | 8.0–12.5 | 17.3–23.1 |
|---|
| Claw II/III lengths |
|---|
| -External primary | 8 | 9.7–12.0 | 23.3–33.3 | 12 | 11.0–15.0 | 21.4–32.6 |
|---|
| -External secondary | 7 | 7.7–11.0 | 18.6–30.6 | 12 | 9.0–14.0 | 18.0–27.5 |
|---|
| -Internal primary | 8 | 9.0–12.2 | 22.9–33.3 | 11 | 11.0–14.5 | 21.4–30.0 |
|---|
| -Internal secondary | 8 | 7.1–11.0 | 18.9–27.8 | 11 | 9.0–13.0 | 17.9–27.7 |
|---|
| Claw IV lengths |
|---|
| -Anterior primary | 8 | 10.6–12.2 | 25.6–30.6 | 10 | 12.0–16.0 | 24.0–34.8 |
|---|
| -Anterior secondary | 6 | 7.3–9.4 | 18.4–21.9 | 10 | 10.0–13.0 | 20.0–28.3 |
|---|
| -Posterior primary | 10 | 9.9–12.2 | 23.8–33.3 | 11 | 12.0–16.0 | 23.2–32.6 |
|---|
| -Posterior secondary | 9 | 7.5–9.9 | 19.0–25.0 | 11 | 10.0–15.3 | 19.6–28.3 |
|---|