Thelecythara mucronataThelecythara mucronata is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.DescriptionThe length of the shell attains 8.6 mm.DistributionT. mucronata can be found in the Gulf of Mexico, ranging from the coast of Texas, United States south to Brazil. Fossils were found in Pliocene strata of Jamaica, age range : 3.6 to 2.588 Ma.