TABLE 2 in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina

TABLE 2. Synthesis of shell characters distinguished at early stages of the three species described herein. ShellCharactersStageSubstageLeft valve Right valveLarval (Prodissoconch)Prodissoconch-1External surface with a pitted or stellate microsculpture pattern, without distinctive commarginal growth linesProdissoconch-2Smooth except for commarginal growth linesLipDevelopment of auricles and diskPostlarval (Dissoconch)NepioconchOuter shell foliate calcite Outer shell columnar prismatic calcite Microsculpture of gutters Surface smooth, appearance of byssal notch, and/or pits, antimarginal fasciole and ctenoliumPost-nepioconchChange in sculpture by addition of radial ribs or folds, scales or other