APPENDIX 21 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

APPENDIX 21. — Measurements of teleoconch and protoconch of Simulamerelina tuamotu n. sp. in mm, with range, mean and standard deviation. 1, holotype, Tuamotu, Makemo, Make, reef flat after Arikitomiro pass <1 m; 2-10, paratypes, Tuamotu, Makemo, Make, reef flat after Arikitomiro pass <1 m.
Teleoconch12345678910Min-maxMeanStdHeight1.571.551.561.301.581.281.651.301.381.321.28-1.651.450.145Width0.900.930.930.760.950.820.930.780.870.770.76-0.950.860.075Height/Width ratio1.741.671.681.711.661.561.771.671.591.711.56-1.771.680.065Aperture height0.530.600.580.500.600.500.600.500.500.500.50-0.600.540.048Height/aperture height ratio2.962.582.692.602.632.562.752.602.762.642.56-2.962.680.121No. whorls3.253.153.102.753.252.603.252.803.102.902.60-3.253.020.236No. axial ribs on last whorls1010121011913810118-1310.41.43No. spiral cords on last whorls8(3)7(3)8(3)7(3)8 (3)7(3)8(3)7(3)7(3)7(3)7(3)- 8(3)7.4(3)0.52(0)(above aperture)Protoconch12345678910Min-maxMeanStdHeight0.3000.3160.3000.3000.3000.3000.3000.3160.3160.2830.283-0.3160.3030.010Diameter of nucleus0.0700.0830.0830.0830.0830.0670.0770.0670.0830.0730.067-0.0830.0770.007Diameter of first half whorl0.1670.1830.1830.1930.1930.1670.1730.1730.1830.1670.167-0.1930.1780.010Maximun diameter0.2750.2600.2930.2730.2660.2670.2830.2730.2670.2500.250-0.2930.2710.012No. whorls1.251.201.251.251.201.251.251.251.251.251.20-1.251.240.021Paucispiralyesyesyesyesyesyesyesyesyesyesyes––