Table 4. A in Taxonomic assessment of genetically-delineated species of radicine snails (Mollusca, Gastropoda, Lymnaeidae)

Table 4. A comparison of conchological, anatomical and caryological features of the genera and subgenera of the Old World radicines*.
Genus (Subgenus)Shell heightShell shapeShell surfaceSpireSpermathecal ductMantle borderHaploid chromosome numberNumber of prostate foldsRacesinaUp to 25 mmOvoid to ovate-conicalSmoothHigh and relatively wideLong?Reflected?175-8MyxasGloboseFlattened, very lowReflected171Radix s. str.Up to 35 mmEar-shaped to ovate-conicalSculpturedLow and acuteNot reflectedExsertianaUp to 30 mmOvate-conicalAmpullaceanaUp to 25 mmEar-shaped to conicalLow to relatively high and obtuseShortPeregrianaUp to 25 mmOvate-conical to conicalMedium-sized and obtuseKamtschaticanaUp to 20 mmOvate-conical to almost globoseLow and obtuse?17TibetoradixUp to 15 mmOvate-conicalHigh to medium-sized, narrow and obtuseLong?17OrientogalbaOvate-conical to almost globoseHigh to low, obtuse16BullastraUp to 30 mmGloboseSmoothVery low, reduced, obtuseLongReflected
*After Aksenova et al. (2018a), modified.

表4. 旧大陆萝卜螺亚科（Radicinae）各属及亚属的贝壳学、解剖学与核学特征比较*。
属（亚属） | 壳高 | 壳形 | 壳面 | 螺塔 | 受精囊管 | 外套膜缘 | 单倍染色体数 | 前列腺褶数
拉齐螺属（Racesina） | 可达25 mm | 卵形至卵圆锥形 | 光滑 | 高且相对宽阔 | 长？ | 反折？ | 17 | 5~8
囊螺属（Myxas） | - | 球形 | 平坦、极度低矮 | - | - | 反折 | 17 | 1
狭义萝卜螺属（Radix s. str.） | 可达35 mm | 耳形至卵圆锥形 | 具雕刻纹 | 低矮且尖锐 | 不反折 | - | - | -
Exsertiana属 | 可达30 mm | 卵圆锥形 | - | - | - | - | - | -
Ampullaceana属 | 可达25 mm | 耳形至圆锥形 | - | 低矮至相对高且钝 | 短 | - | - | -
Peregriana属 | 可达25 mm | 卵圆锥形至圆锥形 | - | 中等大小且钝 | - | - | - | -
Kamtschaticana属 | 可达20 mm | 卵圆锥形至近球形 | - | 低矮且钝？ | - | - | 17 | -
西藏萝卜螺属（Tibetoradix） | 可达15 mm | 卵圆锥形 | - | 高至中等、狭窄且钝 | 长？ | - | 17 | -
Orientogalba属 | - | 卵圆锥形至近球形 | - | 高至低矮、钝 | - | - | 16 | -
Bullastra属 | 可达30 mm | 球形 | 光滑 | 极低、退化且钝 | 长 | 反折 | - | -
*数据源自Aksenova等（2018a），已修改。