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TABLE 2 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)

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NIAID Data Ecosystem2026-05-02 收录
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TABLE 2 Morphometric characters of five Semisulcospira species examined in the present study. Measurements and counts: minimum–maximum value (mean ± SD) (cont.) CharactersS. niponicaS. fuscataS. watanabeiS. nakanoiS. salebrosasp. nov.sp. nov.sp. nov.Longitudinal rib num-9–15 (12.5 ± 1.3)8–15 (10.8 ± 1.6)9–12 (11.0 ± 0.9)8–14 (10.9 ± 1.6)10–13 (11.7 ± 1.2)ber on body whorl ofthe largest embryonicshell (RNE)Shell height of the1.9–4.02.1–3.61.5–3.71.8–3.22.2–3.9largest embryonic(2.9 ± 0.5)(2.9 ± 0.4)(2.4 ± 0.4)(2.4 ± 0.4)(2.9 ± 0.4)shell (SHE)Shell width of the larg-1.6–2.71.7–2.61.4–2.71.7–2.62.0–3.0est embryonic(2.2 ± 0.3)(2.1 ± 0.2)(1.9 ± 0.3)(2.1 ± 0.2)(2.5 ± 0.3)shell (SWE)Whorl number of the2.25–3.752.50–4.002.25–3.502.25–3.252.50–3.75largest embryonic(3.2 ± 0.3)(3.1 ± 0.3)(2.9 ± 0.4)(2.8 ± 0.3)(2.9 ± 0.3)shell (WNE)MaleAperture height (AH)6.4–10.98.1–9.87.7–11.16.8–10.78.2–13.3(8.7 ± 0.8)(9.0 ± 0.8)(9.0 ± 0.8)(8.7 ± 1.1)(9.9 ± 1.7)Aperture length (AL)6.8–11.98.7–9.78.2–11.87.3–11.58.5–13.9(9.4 ± 0.9)(9.2 ± 0.4)(9.4 ± 0.9)(9.2 ± 1.1)(10.4 ± 1.8)Aperture swell legth0–0.190–0.090–0.120.16–0.350.20–0.75(ASL)(0.09 ± 0.04)(0.04 ± 0.05)(0.07 ± 0.04)(0.24 ± 0.06)(0.33 ± 0.14)Aperture slenderness1.36–1.911.63–1.881.68–1.831.47–1.671.41–1.79ratio (ASR)(1.7 ± 0.1)(1.8 ± 0.1)(1.8 ± 0.1)(1.6 ± 0.1)(1.6 ± 0.1)Aperture width (AW)4.1–7.35.0–5.94.5–6.64.7–6.95.2–9.9(5.7 ± 0.6)(5.2 ± 0.4)(5.3 ± 0.5)(5.8 ± 0.6)(6.5 ± 1.4)Basal cord number2–5 (3.2 ± 0.9)32–5 (2.9 ± 0.9)2–4 (2.3 ± 0.6)2–3 (2.3 ± 0.5)(BCN)Body whorl length10.6–17.713.6–16.113.2–18.512.0–18.113.9–22.4(BWL)(14.8 ± 1.3)(15.1 ± 1.2)(14.8 ± 1.3)(14.8 ± 1.7)(16.6 ± 2.8)Fourth whorl length2.0–3.82.5–3.92.6–3.81.8–3.82.0–4.6(FWL)(3.0 ± 0.4)(3.3 ± 0.6)(3.0 ± 0.3)(2.7 ± 0.5)(3.2 ± 0.9)Penultimate whorl3.8–7.25.0–6.14.7–6.74.4–6.55.1–8.3 (6.1 ± 1.1)length (PWL)(5.3 ± 0.5)(5.6 ± 0.5)(5.2 ± 0.5)(5.4 ± 0.6)Longitudinal rib9–18 (11.8 ± 1.9)9–14 (11.0 ± 2.0) 7–12 (10.1 ± 1.3)8–12 (9.4 ± 1.2)9–15 (10.6 ± 1.4)number of penultimatewhorl (RN)Spire angle (SA)18.2–29.714.3–18.413.3–22.816.7–27.716.7–33.3(22.7 ± 2.6)(16.9 ± 1.6)(20.5 ± 2.5)(21.4 ± 3.5)(21.5 ± 4.6)Spiral cord number3–5 (3.9 ± 0.8)5–6 (5.3 ± 0.6)4–5 (4.4 ± 0.5)3–4 (3.4 ± 0.5)3–4 (3.2 ± 0.4)of penultimate whorl(SCN)Shell height (SH)17.5–28.421.8–29.222.0–30.918.0–27.322.1–34.9(23.8 ± 2.1)(26.1 ± 3.3)(25.0 ± 2.2)(23.1 ± 3.0)(27.6 ± 4.9)

表2 本研究中检视的5种半纹螺属(Semisulcospira)物种的形态测量特征。测量与计数数据格式:最小值–最大值(平均值±标准差)(续表) 最大胚壳体螺层纵肋数(RNE):日本半纹螺(S. niponica):9–15(12.5 ± 1.3),褐半纹螺(S. fuscata):8–15(10.8 ± 1.6),渡边半纹螺(S. watanabei):9–12(11.0 ± 0.9),中野半纹螺(S. nakanoi):8–14(10.9 ± 1.6),粗糙半纹螺(S. salebrosa):10–13(11.7 ± 1.2),新种1(sp. nov.)、新种2(sp. nov.)、新种3(sp. nov.):对应数值 最大胚壳壳高(SHE):日本半纹螺:1.9–4.0(2.9 ± 0.5),褐半纹螺:2.1–3.6(2.9 ± 0.4),渡边半纹螺:1.5–3.7(2.4 ± 0.4),中野半纹螺:1.8–3.2(2.4 ± 0.4),粗糙半纹螺:2.2–3.9(2.9 ± 0.4) 最大胚壳壳宽(SWE):日本半纹螺:1.6–2.7(2.2 ± 0.3),褐半纹螺:1.7–2.6(2.1 ± 0.2),渡边半纹螺:1.4–2.7(1.9 ± 0.3),中野半纹螺:1.7–2.6(2.1 ± 0.2),粗糙半纹螺:2.0–3.0(2.5 ± 0.3) 最大胚壳螺层数(WNE):日本半纹螺:2.25–3.75(3.2 ± 0.3),褐半纹螺:2.50–4.00(3.1 ± 0.3),渡边半纹螺:2.25–3.50(2.9 ± 0.4),中野半纹螺:2.25–3.25(2.8 ± 0.3),粗糙半纹螺:2.50–3.75(2.9 ± 0.3) 雄性 壳口高(AH):日本半纹螺:6.4–10.9(8.7 ± 0.8),褐半纹螺:8.1–9.8(9.0 ± 0.8),渡边半纹螺:7.7–11.1(9.0 ± 0.8),中野半纹螺:6.8–10.7(8.7 ± 1.1),粗糙半纹螺:8.2–13.3(9.9 ± 1.7) 壳口长(AL):日本半纹螺:6.8–11.9(9.4 ± 0.9),褐半纹螺:8.7–9.7(9.2 ± 0.4),渡边半纹螺:8.2–11.8(9.4 ± 0.9),中野半纹螺:7.3–11.5(9.2 ± 1.1),粗糙半纹螺:8.5–13.9(10.4 ± 1.8) 壳口膨起长度(ASL):日本半纹螺:0–0.19(0.09 ± 0.04),褐半纹螺:0–0.09(0.04 ± 0.05),渡边半纹螺:0–0.12(0.07 ± 0.04),中野半纹螺:0.16–0.35(0.24 ± 0.06),粗糙半纹螺:0.20–0.75(0.33 ± 0.14) 壳口细长比(ASR):日本半纹螺:1.36–1.91(1.7 ± 0.1),褐半纹螺:1.63–1.88(1.8 ± 0.1),渡边半纹螺:1.68–1.83(1.8 ± 0.1),中野半纹螺:1.47–1.67(1.6 ± 0.1),粗糙半纹螺:1.41–1.79(1.6 ± 0.1) 壳口宽(AW):日本半纹螺:4.1–7.3(5.7 ± 0.6),褐半纹螺:5.0–5.9(5.2 ± 0.4),渡边半纹螺:4.5–6.6(5.3 ± 0.5),中野半纹螺:4.7–6.9(5.8 ± 0.6),粗糙半纹螺:5.2–9.9(6.5 ± 1.4) 底棱数(BCN):日本半纹螺:2–5(3.2 ± 0.9),褐半纹螺:3–5(2.9 ± 0.9),渡边半纹螺:2–4(2.3 ± 0.6),中野半纹螺:2–3(2.3 ± 0.5) 体螺层长(BWL):日本半纹螺:10.6–17.7(14.8 ± 1.3),褐半纹螺:13.6–16.1(15.1 ± 1.2),渡边半纹螺:13.2–18.5(14.8 ± 1.3),中野半纹螺:12.0–18.1(14.8 ± 1.7),粗糙半纹螺:13.9–22.4(16.6 ± 2.8) 第四螺层长(FWL):日本半纹螺:2.0–3.8(3.0 ± 0.4),褐半纹螺:2.5–3.9(3.3 ± 0.6),渡边半纹螺:2.6–3.8(3.0 ± 0.3),中野半纹螺:1.8–3.8(2.7 ± 0.5),粗糙半纹螺:2.0–4.6(3.2 ± 0.9) 次体螺层长(PWL):日本半纹螺:3.8–7.2(5.3 ± 0.5),褐半纹螺:5.0–6.1(5.6 ± 0.5),渡边半纹螺:4.7–6.7(5.2 ± 0.5),中野半纹螺:4.4–6.5(5.4 ± 0.6),粗糙半纹螺:5.1–8.3(6.1 ± 1.1) 次体螺层纵肋数(RN):日本半纹螺:9–18(11.8 ± 1.9),褐半纹螺:9–14(11.0 ± 2.0),渡边半纹螺:7–12(10.1 ± 1.3),中野半纹螺:8–12(9.4 ± 1.2),粗糙半纹螺:9–15(10.6 ± 1.4) 螺塔角(SA):日本半纹螺:18.2–29.7(22.7 ± 2.6),褐半纹螺:14.3–18.4(16.9 ± 1.6),渡边半纹螺:13.3–22.8(20.5 ± 2.5),中野半纹螺:16.7–27.7(21.4 ± 3.5),粗糙半纹螺:16.7–33.3(21.5 ± 4.6) 次体螺层螺旋棱数(SCN):日本半纹螺:3–5(3.9 ± 0.8),褐半纹螺:5–6(5.3 ± 0.6),渡边半纹螺:4–5(4.4 ± 0.5),中野半纹螺:3–4(3.4 ± 0.5),粗糙半纹螺:3–4(3.2 ± 0.4) 壳高(SH):日本半纹螺:17.5–28.4(23.8 ± 2.1),褐半纹螺:21.8–29.2(26.1 ± 3.3),渡边半纹螺:22.0–30.9(25.0 ± 2.2),中野半纹螺:18.0–27.3(23.1 ± 3.0),粗糙半纹螺:22.1–34.9(27.6 ± 4.9)
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2025-04-05
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