Ptichodis vinculum, the black-tipped ptichodis moth, is a moth of the family Erebidae. In mathematics, an overline can be used as a vinculum. Semioptila vinculum is a moth in the Himantopteridae family. Semioptila vinculum was described by Erich Martin Hering in 1937. A vinculum is also found in insects' male genitalia. The vinculum is broad, with a large slender saccus; the tegumen is elongated. Vectra Networks Inc. FabHotels, BrowserStack, Vinculum Group, Instana, CleverTap and Egyptian Instabug. A vinculum is a horizontal line used in mathematical notation for a specific purpose. "Vinculum" members (from the Latin for "bond" or "link"), can be married, single or widowed.