 The authors analysed 31 species in the genus "Strombus" and three species in the allied genus "Lambis".The cladogram was based on DNA sequences of both nuclear histone H3 and mitochondrial cytochrome-c oxidase I (COI) protein-coding gene regions.In this proposed phylogeny, "Strombus pugilis", "Strombus alatus", "Strombus granulatus" and "Strombus gracilior" are closely related and appear to share a common ancestor.