@inbook {6609,
	title = {Evolution of the Praecardioida (Cryptodonta, Bivalvia) in Paleozoic and Mesozoic epeiric seas},
	booktitle = {Geological Association of Canada, Joint Annual Meeting, Abstract Volume 27},
	year = {2002},
	pages = {57},
	keywords = {bivalvia, cryptodonta, evolution, mollusca, praecardioida},
	author = {Johnston, Paul A. and Collom, C. J.}
}
@inbook {6604,
	title = {Reinterpretation of the bivalve subclass Cryptodonta},
	booktitle = {Geological Society of America Annual Meeting - Toronto, Ontario; abstracts},
	volume = {30(7)},
	year = {1998},
	pages = {A-93},
	keywords = {bivalvia, cryptodonta, shell morphology},
	author = {Johnston, Paul A.}
}
