Table 4 in Molecular phylogeny and comparative morphology reveal the species validity and systematic position of Lepidodesma (Bivalvia: Unionidae)

Table 4 Shell characters of Lepidodesma aligera and Lepidodesma languilati CharactersLepidodesma aligera (n =3)Lepidodesma languilati (n =6)Length (mm)161.38–175.22192.25–207.67Height (mm)98.67–108.56121.46–138.34Width (mm)75.33–81.7883.18–88.35Shell shapeSubtriangularSubtriangularPseudocardinal teethNearly absentNearly absentLateral teeth2L, 1R2L, 1RUmbo position1/4 of shell length; umbo higher than the dorsal margin1/3 of shell length; umbo obviously higher than the dorsal marginUmbo sculptureDoubly looped or doubly noduled ridgesDoubly looped ridgesUmbo pocketDeep, wideDeep, wideSurface sculptureRidges that follow the growth lines, two strong posterior dorsal ridges, and scattered nodules on the post-dorsal wingRidges that follow the growth lines and two strong posterior dorsal ridgesNacre colorOrange, umbo pocket is pale greenOrange, umbo pocket is lilacDorsal marginAnterior margin oval, dorsal margin nearly perpendicularAnterior margin oval, with the dorsal margin curvedto the posterior margin, strongly curved upwards near the downwards posterior edgeVentral marginSlightly curveSlightly curve L left valve, R right valve表4 鳞壳蛤属（Lepidodesma）两种物种的贝壳特征 | 特征 | 鳞壳蛤Lepidodesma aligera（n=3） | 鳞壳蛤Lepidodesma languilati（n=6） | | ---- | ---- | ---- | | 壳长（mm） | 161.38–175.22 | 192.25–207.67 | | 壳高（mm） | 98.67–108.56 | 121.46–138.34 | | 壳宽（mm） | 75.33–81.78 | 83.18–88.35 | | 贝壳形状 | 近三角形 | 近三角形 | | 假主齿（pseudocardinal teeth） | 近乎缺失 | 近乎缺失 | | 侧齿（lateral teeth） | 2左（2L）、1右（1R） | 2左（2L）、1右（1R） | | 壳顶（umbo）位置 | 壳长的1/4处，壳顶高于背缘 | 壳长的1/3处，壳顶显著高于背缘 | | 壳顶（umbo）纹饰 | 双环或双结节状脊 | 双环脊 | | 壳顶窝（umbo pocket） | 深且宽阔 | 深且宽阔 | | 贝壳表面纹饰 | 沿生长线分布的脊、2条发达的后背部脊，以及后背翼（post-dorsal wing）上散布的结节 | 沿生长线分布的脊与2条发达的后背部脊 | | 珍珠层（nacre）颜色 | 橙色，壳顶窝呈淡绿色 | 橙色，壳顶窝呈淡紫色 | | 背缘 | 前缘呈卵圆形，背缘近乎垂直 | 前缘呈卵圆形，背缘向后方弯曲，在向下的后缘附近强烈向上弯曲 | | 腹缘 | 轻微弯曲 | 轻微弯曲 | 备注：L代表左壳，R代表右壳。