DOI: 10.5281/zenodo.15160836
title: Table 3 in Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden

description: Table 3 (continued on next page). Measurements (in μm) and pt values of selected morphological structures of adults of Richtersius nicolai sp. nov. excluding hatchlings. Specimens mounted in Hoyer’s medium. Range refers to the smallest and the largest structure among all measured specimens. Abbreviations: N = number of specimens/structures measured; SD = standard deviation.
CharacterNRange µm ptMean µm ptSD µm ptHolotype µm ptBody length14493 –853740–1171640910104119634920Buccal tubeBuccal tube length1458.0 –76.570.25.368.9Stylet support insertion point1040.8 –52.967.6 –71.148.370.04.01.248.370.1Buccal tube external width144.2–5.35.8–7.74.76.70.30.65.37.7Buccal tube internal width141.4–3.02.1–4.32.13.10.50.71.82.6Ventral lamina length1323.1 –35.334.7 –48.930.043.04.35.126.538.5Placoid lengthsMacroplacoid 1126.2–9.610.2 –13.88.111.61.01.18.111.7Macroplacoid 2146.2–8.29.3–13.47.410.60.61.06.59.5Placoid row1414.6 –22.522.3 –31.017.825.52.02.816.724.2Claw I heightsExternal base128.7–15.012.2 –20.611.516.41.72.211.016.0External primary branch1315.2 –24.925.7 –34.120.629.32.82.819.728.6External secondary branch1312.1 –20.019.6 –27.516.323.22.42.715.822.9External base/primary branch (cct)1246.3 –61.155.84.656.0Internal base118.8–14.114.5 –18.411.616.71.61.512.217.7Internal primary branch1315.5 –24.324.8 –32.819.928.42.72.519.728.6Internal secondary branch1311.6–20.419.6 –28.116.123.02.52.716.123.3Internal base/primary branch (cct)1149.3 –64.258.13.961.9Claw II heightsExternal base128.5–16.013.1 –21.912.317.52.42.711.416.5External primary branch1316.0 –25.424.3 –34.921.030.03.23.522.031.9External secondary branch1312.5 –20.818.0 –28.616.824.02.83.216.924.5External base/primary branch (cct)1251.6 –63.057.53.951.6Internal base119.2–15.213.8 –20.811.917.02.02.411.416.6Internal primary branch1315.0 –25.124.1 –33.020.228.83.13.020.529.7Internal secondary branch1310.9 –21.315.7 –29.216.623.63.13.616.323.6Internal base/primary branch (cct)1147.1 –63.957.45.155.9Claw III heightsExternal base137.8–16.713.5 –23.112.617.92.53.011.717.0External primary branch1315.3 –26.226.3 –36.021.530.63.02.820.529.7External secondary branch1311.9–26.620.6 –35.818.326.03.54.016.624.1External base/primary branch (cct)1350.6 –69.358.45.557.3Internal base118.3–15.012.1 –20.712.017.11.82.58.312.1Internal primary branch1313.3 –26.523.0 –34.620.629.33.43.517.325.1Internal secondary branch1213.0 –20.618.8 –28.017.224.32.22.613.018.8Internal base/primary branch (cct)1148.1 –66.257.65.748.1Claw IV heightsAnterior base1311.7–18.517.3 –25.314.921.32.22.415.622.7Anterior primary branch1320.8 –33.030.5 –44.827.138.74.24.926.939.0Anterior secondary branch1314.7 –24.721.2 –34.119.828.33.33.719.728.5Anterior base/primary branch (cct)1349.3 –63.255.54.858.2Posterior base1211.2–20.118.6 –27.615.522.12.93.015.222.1Posterior primary branch1320.6 –35.231.4 –48.427.238.84.54.727.039.1Posterior secondary branch1210.7 –28.015.5 –38.420.228.74.75.610.715.5Posterior base/primary branch (cct)1249.4 –64.556.03.956.4Number of teeth on internal lunula III128–129.91.49Number of teeth on external lunula III108–139.71.510Number of teeth on anterior lunula IV117–1410.52.313Number of teeth on posterior lunula IV108–1813.73.0Body length21441 – 742688 – 9756328637172742964Buccal tubeBuccal tube length2462.0 – 79.2–72.3–5.0–77.0–Stylet support insertion point2144.6 – 56.868.1 – 73.851.271.13.81.654.270.4Buccal tube external width224.2 – 6.86.0 – 9.45.77.80.80.96.07.8Buccal tube internal width221.2 – 1.91.6 – 2.71.62.20.20.31.52.0Ventral lamina length1022.5 – 27.329.4 – 42.524.634.01.94.1Placoid lengthsMacroplacoid 1196.6 – 8.99.4 – 12.77.910.90.70.88.310.8Macroplacoid 2216.3 – 9.08.4 – 13.07.510.40.81.08.410.8Placoid row1914.2 – 19.320.7 – 26.517.323.71.41.418.624.2Claw I heightsExternal base98.7 – 16.911.6 – 22.012.016.32.63.316.922.0External primary branch1216.0 – 23.024.0 – 30.219.927.12.12.323.029.9External secondary branch1212.1 – 19.818.9 – 26.316.922.92.32.519.225.0External base/primary branch (cct)939.4 – 73.4–59.6–12.4–73.4–Internal base98.4 – 16.311.1 – 21.211.716.02.63.116.321.2Internal primary branch1315.7 – 24.722.3 – 34.019.927.12.73.321.728.2Internal secondary branch1311.7 – 19.818.2 – 27.216.422.32.63.018.624.2Internal base/primary branch (cct)938.0 – 75.3–60.2–10.4–75.3–Claw II heightsExternal base1010.5 – 16.514.9 – 21.412.517.61.91.816.521.4External primary branch1516.1 – 24.624.6 – 33.720.728.62.32.824.632.0External secondary branch1512.6 – 20.119.6 – 29.517.323.92.42.920.126.1External base/primary branch (cct)1046.7 – 68.7–61.3–6.7–66.8–Internal base139.1 – 15.214.7 – 20.312.617.51.71.715.219.7Internal primary branch1616.0 – 24.024.1 – 34.520.628.72.53.324.031.2Internal secondary branch1612.1 – 19.519.0 – 27.216.623.02.22.718.524.0Internal base/primary branch (cct)1349.6 – 69.7–61.7–6.6–63.3–Claw III heightsExternal base1111.1 – 17.414.2 – 22.513.418.32.12.417.422.5External primary branch1419.2 – 24.726.1 – 34.122.030.21.92.424.732.0External secondary branch1415.0 – 21.021.1 – 28.418.525.41.62.019.825.7External base/primary branch (cct)1145.7 – 75.6–61.0–8.5–70.3–Internal base109.5 – 15.712.6 – 20.412.516.82.12.415.720.4Internal primary branch1218.7 – 24.725.2 – 34.621.629.42.12.723.830.9Internal secondary branch1213.6 – 20.519.3 – 26.617.323.62.12.418.524.0Internal base/primary branch (cct)1048.2 – 66.2–57.6–7.4–66.0–Claw IV heightsAnterior base1212.5 – 21.117.6 – 27.316.922.42.63.221.127.3Anterior primary branch1721.8 – 32.231.9 – 44.327.537.03.13.632.241.8Anterior secondary branch1715.6 – 23.923.8 – 34.220.828.32.43.221.127.3Anterior base/primary branch (cct)1250.8 – 69.2–59.8–5.2–65.4–Posterior base1412.0 – 19.417.3 – 26.516.622.42.53.219.425.2Posterior primary branch1721.8 – 33.031.6 – 45.627.837.43.23.933.042.8Posterior secondary branch1712.9 – 25.420.1 – 35.221.629.23.34.024.231.4Posterior base/primary branch (cct)1441.0 – 69.6–58.6–7.9–58.8–Number of teeth on internal lunula III810 – 1512.01.4Number of teeth on external lunula III79 – 1110.10.710Number of teeth on anterior lunula IV109 – 119.80.811Number of teeth on posterior lunula IV1111 – 2215.13.115
description: Published as part of Vecchi, Matteo, Godziek, Jakub, Kristensen, Reinhardt M., Piemontese, Lucia, Calhim, Sara & Stec, Daniel, 2025, Taxonomic reanalysis of the genus Richtersius (Tardigrada; Eutardigrada), with description of two new species from Italy and Sweden, pp. 163-174 in European Journal of Taxonomy 981 on page 163, DOI: 10.5852/ejt.2025.981.2823, http://zenodo.org/record/15023722