S. angusta

S. angusta may refer to:
 * Sannantha angusta, species of flowering plant
 * Somatidia angusta, species of beetle
 * Spesbona angusta, species of damselfly
 * Spiralisigna angusta, species of moth in the family Geometridae
 * Stericta angusta, species of snout moth
 * Syrnola angusta, species of sea snail