APPENDIX 5 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
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APPENDIX 5. — Measurements of teleoconch and protoconch of Alvania parvimacula n. sp. in mm, with range, mean and standard deviation: 1, holotype, Tuamutu, Makemo, Arikitamiro Pass 1-20 m; 2-5, paratypes, Tuamotu, Makemo, Arikitamiro Pass 1-20 m.
Teleoconch12345Min–maxMeanStdHeight1.651.421.701.471.471.42-1.701.540.124Width0.950.900.950.950.850.85-0.950.920.045Height/Width ratio1.741.581.791.551.731.55-1.791.680.107Aperture height0.700.650.720.700.620.62-0.720.680.041Height/aperture height ratio2.362.182.362.102.372.10-2.372.270.125No. whorls3.102.453.202.352.802.35-3.202.780.379No. axial ribs on last whorls161616191716-1916.81.30No. spiral cords on last whorls (above aperture)7(3)7(3)7(3)7(3)7(3)7(3)7 (3)0 (0)StartII, IIIII, IIIII, IIIII, IIIII, IIIII, III––Protoconch12345Min–maxMeanStdHeight0.2500.2500.2500.2500.2620.250-0.2620.2520.005Diameter of nucleus0.1000.1000.1120.1120.1250.100-0.1250.1100.010Diameter of first half whorl0.1700.1870.2120.1870.2120.170-0.2120.1930.018Maximun diameter0.2620.2750.2750.3000.2500.250-0.3000.2720.019No. whorls1.201.201.201.251.151.15-1.251.20.03Paucispiralyesyesyesyesyesyes––
创建时间:
2025-04-05



