@inbook {6608,
	title = {Contrasting structure and morphogenesis of ligaments in Cryptodonta and early Pteriomorphia (Mollusca; Bivalvia)},
	booktitle = {Malacological Society of London, Biology \& Evolution of the Bivalvia, Paper and Poster Abstracts},
	year = {1999},
	pages = {25-26},
	keywords = {bivalvia, evolution, fossils, ligament, mollusca, paleontology, pteriomorphia},
	author = {Johnston, Paul A. and Collom, C. J.}
}
@article {6598,
	title = {Systematics and ontogeny of a new bivalve, <i>Umburra cinefacta</i>, from the Silurian of Australia: implications for pteriomorphian evolution},
	journal = {Alcheringa},
	volume = {15},
	year = {1991},
	pages = {293-319},
	keywords = {bivalvia, evolution, mollusca, ontogeny, pteriomorphia, shell morphology, silurian, systematics, taxonomy, umburra},
	author = {Johnston, Paul A.}
}
@article {1276,
	title = {Systematics and ontogeny of a new bivalve, Umburra cinefacta, from the Silurian of Australia: implications for pteriomorphian evolution},
	journal = {Alcheringa},
	volume = {15},
	year = {1991},
	pages = {293-319},
	keywords = {bivalvia, evolution, mollusca, ontogeny, pteriomorphia, shell morphology, silurian, systematics, taxonomy, umburra},
	author = {Johnston, Paul A.}
}
