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Table 2 Comparisons of measurements and distances of specific structures and organs to the anterior tip of different species of Lobatocerebridae

From: Detailed reconstruction of the nervous and muscular system of Lobatocerebridae with an evaluation of its annelid affinity

  Lobatocerebrum psammicola live L. psammicola fixed Lobatocerebrum sp. 1 Lobatocerebrum sp. 2 Lobatocerebrum riegeri L. riegeri conclusions/remarks
Total length [mm] 3.0 2.0–2.2 1.1 1.7 1.57 (1.08–1.6 [0.48]) L. riegeri is shorter than L. psammicola and the other reported specimens
Total width [mm] 0.11 0.07–0.08 0.06 0.06 0.04 (0.04–0.06 [0.07]) L. riegeri is thinner than the other species and reported specimens, though not relative to the body length
Relative width 0.036 0.035–0.036 0.055 0.035 0.025 (0.025–0.038 [0.15]) L. riegeri is thinner than the other species and reported specimens, though not relative to the body length
Position of the neuropile [1–100U] 9 7–12 14 12 18.18 (8.22–18.18 [27.61]) →displaced more posteriorly in L. riegeri than in L. psammicola and the other reported specimens
Position of the brain [1–100U] 9 7–12 14 12 15.65 (12.7–20.5 [28.8])
Position of the mouth [1–100U] 14 10–17 20 20 20.48 (20.48–34.69 [38.14]) →displaced more posteriorly in L. riegeri than in L. psammicola, but in the same range as the other reported species
Position of the male gonopore [1–100U] 38 30–36 No measurements provided 31 37.72 (34.68–44.16) → range outside L. sp. 2, but similar to L. psammicola
Position of the testis [1–100U] 47–57 46–56 No measurements provided 35–43 48.21 (44.33–53.48) → posterior to L. sp.2, but with the broad range similar to L. psammicola
Position of the ovary [1–100U] 58–63   No measurements provided 48–79 70.42 (65.17–70.42) → too broad ranged to be diagnostic
Position of the seminal receptacles [1–100U] 90,5 87–89 No measurements provided 88 90.84 (84.06–90.84) → too broad ranged to be diagnostic
  1. The measurements of Lobatocerebrum psammicola, L. sp. 1 and L. sp. 2 were taken from [8]. L. riegeri n. sp. (this study) was obtained from this study and translated in the units used by [8] (in 1–100U for the entire body length). For L. riegeri n. sp., all measurements are taken from fixed and mounted specimens in the following order: holotype [range of all adult specimens (juvenile)]. L. riegeri n. sp. specimen III was excluded from the range given for body length and width, since it was compressed to a high degree, but was considered for the relative measurements