TABLE 4 in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina

TABLE 4. Measurements for the early shell of 3 Argentine pectinids. AA = anterior auricle; PA = posterior auricle; AA/ PA = ratio; PriS = prismatic stage; NR = number of ribs; AC = teeth of active ctenolium; N = Nepioconch of left valve (*). Measurements in mm, angles in degree (º). NLengthAngleAAPAAA/PAPriS NRACN (*)Aequipecten tehuelchus14.75981.821.980.922.581931.7524.8962.122.360.92.381841.9934.401072.052.180.942.531732.9045.00932.312.271.023.511842.2555.521012.252.460.912.901842.4064.171041.772.050.862.481842.2274.31981.841.980.922.552032.2785.66952.612.750.952.531662.4295.51942.382.570.932.801832.06104.291031.761.970.892.421832.02115.581042.272.520.93.601741.96125.461001.762.680.662.71842.60134.971011.952.050.952.891932.23143.81991.61.750.912.301832.24155.06952.132.360.902.621842.12164.87982.052.30.892.661542.23174.56991.862.150.872.751832.29184.511011.972.050.963.351642.67193.601021.371.710.802.21842.32203.301021.411.520.932.551832.09Mean4.701001.962.180.902.71--2.25SD0.6740.320.330.070.38--0.26Mode------184-Flexopecten felipponei13.67981.541.690.911.99-42.0223.131021.171.270.921.88-31.93Mean1001.361.480.921.93--1.97Zygochlamys patagonica13.44921.250.911.371.393132.5723.50931.280.941.371.282832.1433.22881.100.821.341.132832.2543.21891.090.811.341.012632.6152.93881.170.891.321.382332.0062.92861.230.971.261.572122.47Mean3.20891.190.891.331.29--2.34SD0.2420.080.060.040.2--0.25Mode------283-表4 3种阿根廷扇贝类（pectinids）的早期壳体测量数据。AA=前耳（anterior auricle）；PA=后耳（posterior auricle）；AA/PA=前耳后耳比值；PriS=棱柱层期（prismatic stage）；NR=肋条数（number of ribs）；AC=活动栉缘齿（teeth of active ctenolium）；N=左壳胎壳（Nepioconch of left valve）（*）。测量单位为毫米（mm），角度单位为度（°）。 表格列依次为：序号（N）、壳长（Length）、壳角（Angle）、前耳长（AA）、后耳长（PA）、前耳/后耳比值（AA/PA）、棱柱层期（PriS）、肋条数（NR）、活动栉缘齿数（AC）、左壳胎壳（N (*)）。 1. 特维尔奇拟日月贝（Aequipecten tehuelchus）： 共包含20组测量样本，其统计参数如下：平均值（Mean）为4.70、100、1.96、2.18、0.90、2.71、-、-、2.25；标准差（SD）为0.67、4、0.32、0.33、0.07、0.38、-、-、0.26；众数（Mode）为-、-、-、-、-、-、18、4、-。 2. 费利蓬内镰扇贝（Flexopecten felipponei）： 统计参数如下：平均值（Mean）为-、100、1.36、1.48、0.92、1.93、-、-、1.97。 3. 巴塔哥尼亚栉孔扇贝（Zygochlamys patagonica）： 共包含6组测量样本，其统计参数如下：平均值（Mean）为3.20、89、1.19、0.89、1.33、1.29、-、-、2.34；标准差（SD）为0.24、2、0.08、0.06、0.04、0.2、-、-、0.25；众数（Mode）为-、-、-、-、-、-、28、3、-。