Gelagna succincta, common name the lesser girdled triton, is a species of predatory sea snail, a marine gastropod mollusk in the family Cymatiidae.

This species is distributed in the Indian Ocean (Tanzania, Madagascar), in the Atlantic Ocean (Gabon, West Africa, Cape Verde) and the Red Sea.

[1] Also reported from Brazil and from South-East Florida.

Beached shells are rarely known from the East coast of Barbados, Lesser Antilles.The shell size varies between 30 mm and 80 mm.

[citation needed] The maximum recorded shell length is 45 mm.