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Table 6 Means with standard deviations and ranges of putative new morphometric characters for phenotypic species delimitation in Richtersius tested in this study

From: A new redescription of Richtersius coronifer, supported by transcriptome, provides resources for describing concealed species diversity within the monotypic genus Richtersius (Eutardigrada)

Species (population)statisticPDPSExtTIntTAntTPosTSSIPCCT
R. coronifer s.s. (NO.385)mean ± SD74 ± 71.2 ± 0.211 ± 110 ± 110 ± 211 ± 173.6 ± 1.2%49.6 ± 4.4%
range60–880.7–1.69–118–129–1310–1172.2–75.6%42.5–55.7%
Richtersius sp. 4 (IT.120)mean ± SD10 ± 22.1 ± 0.314 ± 213 ± 118 ± 316 ± 168.7 ± 1.3%61.8 ± 3.4%
range6–131.3–3.012–1711–1514–2214–1966.8–70.8%57.7–68.4%
Richtersius sp. 7 (GR.008)mean ± SD6 ± 22.9 ± 0.613 ± 112 ± 112 ± 213 ± 164.7 ± 1.3%56.3 ± 4.6%
range4–101.6–4.211–1410–159–1511–1563.3–66.4%46.8–65.8%
  1. PD the number of pores within rectangle of 2500 μm2 of dorsal cuticle between legs III and IV (hatchlings, i.e. first instars only); PS – pore size, measured as the longest diameter (μm); ExtT, IntT – the number of teeth on external and internal lunules III (adults, i.e. instars 2+ only), respectively; AntT, PosT – the number of teeth on anterior and posterior lunules IV, respectively (adults only); SSIPpt of the stylet support insertion point (expressed as percentage); CCT – claw common tract index for external claws III (expressed as percentage). Ten specimens have been measured for each trait. For PS, 10 pores each from each of the 10 specimens have been measured