TABLE 1 in Shallow-water Rissoidae of the genera Alvania Risso 1826 Haurakia Iredale 1915 Parashiela Laseron 1956 Simulamerelina Ponder 1985 and Subestea Cotton 1944 Gastropoda Caenogastropoda Rissooidea from French Polynesia with the description of a new deep-water genus

TABLE 1. — Measurements of teleoconch and protoconch of Polynesian species of Alvania and Ellenstrongia n. gen., in mm, with minimum-maximum range and mean [standard deviation in square parentheses]; sample size in parentheses with the species name; M, protoconch multispiral; P, protoconch paucispiral.
Alvania letourneuxi n. sp. (1)Alvania herosae n. sp. Morph A + B (17 + 20)Alvania herosae n. sp. Morph A (17)Alvania herosae n. sp. Morph B (20)Alvania parvimaculata n. sp. (5)Alvania prosocostata n. sp. (9)Alvania uapou n. sp. (10)Ellenstrongia tarasoc n. gen., n. sp. (7)TeleoconchHeight1.601.55-2.471.55-2.251.67-2.471.42-1.701.77-2.051.57-1.823.82-4.502.061.922.181.541.941.694.11[0.254][0.228][0.209][0.124][0.098][0.076][0.215]Width0.950.90-1.320.90-1.250.97-1.320.85-0.951.10-1.250.85-0.971.82-2.121.131.081.170.921.180.911.95[0.109][0.114][0.092][0.045][0.047][0.035][0.090]Height/Width ratio1.691.67-2.021.67-1.881.72-2.021.55-1.791.56-1.711.65-1.982.03-2.171.811.751.871.681.641.862.11[0.0932][0.0622][0.0800][0.1068][0.0519][0.1076][0.049]Aperture height0.680.7-1.050.70-1.000.70-1.050.62-0.720.75-0.920.60-0.651.25-1.470.850.810.870.680.860.621.36[0.0856][0.087][0.079][0.041][0.048][0.024][0.075]Height/aperture height ratio1.742.15-2.652.15-2.532.34-2.652.10-2.372.14-2.362.49-2.922.89-3.202.432.342.512.272.242.713.02[0.1300][0.1105][0.0908][0.1245][0.0689][0.1302][0.098]No. whorls2.903-4.23.00-4.103.20-4.202.35-3.203.15-3.503.20-3.505.20-5.753.73.473.92.783.313.345.36[0.36][0.357][0.27][0.378][0.110][0.129][0.264]No. axial ribs on last whorls2113-2115-2113-2116-1922-2914-2511-1316.517.616.0516.824.519.412.1[1.98][2.13][1.820][1.30][2.56][3.36][0.69]No. spiral cords on last whorls (above aperture)7(3)7-13 (3-7)8-13 (4-7)7-10 (3-5)7 (3)11-14 (5-7)8-9 (4)14-17(9-10)9.6 (4.7)11 (5.52)8.3 (4.05)7 (3)12.37 (6.37)8.5 (4)15.3(9.3)[1.69 (0.96)][1.3 (0.799)][0.75 (0.394)][0 (0)][1.302 (0.744)][0.53 (0)][1.11 (2.16)]ProtoconchHeight0.2500.205-0.2750.205-0.2750.212-0.2750.250-0.2620.220-0.2750.237-0.2870.437-0.5250.2410.2400.2410.2520.2460.2620.448[0.0154][0.0166][0.0147][0.0054][0.0161][0.0199][0.029]Diameter of nucleus0.0750.100-0.1250.100-0.1250.100-0.1250.100-0.1250.112-0.1250.100-0.1250.057-0.1270.1150.1160.1140.1100.1170.1100.085[0.0070][0.0075][0.0072][0.0104][0.0068][0.0113][0.024]Diameter of first half whorl0.1500.20-0.250.200-0.2370.200-0.2500.170-0.2120.212-0.2370.175-0.2200.125-0.2000.220.2150.2200.1930.2280.1970.166[0.015][0.0149][0.0149][0.0182][0.0092][0.0145][0.028]Maximum diameter0.2000.275-0.3370.287-0.3370.275-0.3250.250-0.3000.275-0.3250.287-0.3370.387-0.4330.3080.3120.3030.2720.3040.3070.407[0.0142][0.0117][0.0152][0.0186][0.0191][0.0146][0.015]No. of whorls1.001-1.31.00-1.301.15-1.301.15-1.251.10-1.251.25-1.402.75-3.201.21.221.221.21.211.332.95[0.05][0.064][0.033][0.03][0.046][0.042][0.204]Protoconch typePPPPPPPM