@article {7240,
	title = {Classification and evolution of the Bivalvia: an analytical study},
	journal = {Philosophical Transactions of the Royal Society of London, Series B},
	volume = {316},
	number = {1177},
	year = {1987},
	pages = {277-301},
	keywords = {bivalvia, evolution, mollusca, morphology, phylogeny, pinnoidea, pterioidea},
	author = {Purchon, R. D.}
}
