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Table 2 Eggcase morphometric measurements of the eight rajid species analyzed

From: Morphological descriptions of the eggcases of skates (Rajidae) from the central-western Mediterranean, with notes on their distribution

Species N   ECL ECW AAL PAL RKW LKW RAHL LAHL RPHL LPHL
D. nidarosiensis 5 Range 153–177 61.8–80.5 38.2–49.7 26.2–40.9 6.5–7.7 6.9–7.8 9–14.6 9–12.4 18.1–25 18.1–35.0
Mean ± SD 170.2 ± 9.8 74.8 ± 7.5 42.6 ± 4.4 34.3 ± 5.4 7.2 ± 0.5 7.3 ± 0.4 10.9 ± 2.1 10.5 ± 1.2 21.2 ± 2.5 23.2 ± 6.7
D. oxyrinchus 37 Range 91.6–116.2 48.9–67.5 20.3–31.7 7.7–20.8 3.2–8 3.2–8 27.1–47.4 27.1–47.4 26.1–40.4 26.1–40.4
Mean ± SD 103.8 ± 5.3 57.0 ± 4.0 26.0 ± 2.5 14.9 ± 3.0 5.4 ± 1.1 5.4 ± 1.1 35.0 ± 6.1 35.0 ± 6.1 32.5 ± 5.1 32.5 ± 5.1
L. melitensis 6 Range 42.3–45 22.4–26 5.6–6.4 0.4–1.3 – – 42.5–52.5 38.9–52.0 16.5–20.8 13.1–20.2
Mean ± SD 44.1 ± 1.0 23.8 ± 1.4 6.0 ± 0.4 0.7 ± 0.4 – – 47.0 ± 4.0 44.7 ± 4.8 18.2 ± 1.9 16.6 ± 2.6
R. asterias 59 Range 39.7–55.4 22.4–40.5 4.5–8.9 1–3.8 1.5–4.3 1.5–4.3 18.8–30.5 18.8–30.5 12.1–27.3 12.1–27.3
Mean ± SD 48.3 ± 3.0 33.7 ± 2.6 6.9 ± 1.0 2.1 ± 0.7 2.4 ± 0.7 2.4 ± 0.7 24 ± 3.3 24 ± 3.3 22.3 ± 3.1 22.3 ± 3.1
R. brachyura 12 Range 113–133 64.7–72.2 18.5–25.7 17.5–26.6 3.5–7.4 3.5–7.4 55.6–80.7 55.2–80.7 30.4–59.2 30.4–59.2
Mean ± SD 119.3 ± 4.9 69.5 ± 2.3 21.9 ± 2.5 21.7 ± 2.6 5.5 ± 1.4 5.7 ± 1.4 69.7 ± 10.0 69.5 ± 10.3 43.7 ± 11.0 44. ± 10.7
R. clavata 10 Range 62.5–67.5 41.7–47.4 9.5–15.9 6–8.4 3.1–4.8 3.1–4.8 25–40.6 25–40.6 19.2–24.5 19.2–24.5
Mean ± SD 64.1 ± 1.9 43.8 ± 2.0 11.4 ± 1.8 6.8 ± 0.9 3.8 ± 0.6 3.8 ± 0.6 32.5 ± 5.0 32.5 ± 5.0 22.7 ± 1.6 22.7 ± 1.6
R. miraletus 34 Range 41.8–56.5 22.8–29.2 3–9.9 1.3–4.2 – – 8.8–27.9 8.8–27.9 10.2–21.7 10.2–21.7
Mean ± SD 47.4 ± 4.0 24.7 ± 1.7 7.2 ± 1.7 2.7 ± 0.8    18.1 ± 4.7 18.1 ± 4.7 16.3 ± 3.3 16.3 ± 3.3
R. polystigma 14 Range 56.6–69.2 33.9–44.3 4.7–13.4 1–2.8 0.8–2.7 0.8–2.3 18.9–36.0 18.4–35.2 12–26.5 12–26.6
Mean ± SD 62.3 ± 4.3 37.9 ± 2.9 9.4 ± 2.4 2.0 ± 0.6 1.7 ± 0.6 1.6 ± 0.5 27.5 ± 5.2 27.3 ± 5.1 22.4 ± 4.8 22.3 ± 4.8
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Helgoland Marine Research

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