Bactrocythara obtusaBactrocythara obtusa is an extinct species of sea snail, a marine gastropod mollusk in the family Mangeliidae.DescriptionThe length of its shell reached 5.4 mm and its diameter 1.9 mm.DistributionThis extinct species was found in the Pliocene strata of Jamaica. It existed from 3.6 to 2.588 Ma.