Tom Barnard; Frondicularia from the lower Lias of England. Micropaleontology ; 3 (2): 171–180. doi:
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Describes and discusses variations, growth stages, and the range of smooth forms of Frondicularia from lower Liassic localities of England, assigned to the F. brizaeformis group, and of ornamented forms assigned to the F. sulcata plexus.
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