Article: Calcareous algae new to the British Carboniferous
The first British records of two Lower Carboniferous algal taxa known from the U.S.S.R. and elsewhere are given: Ungdarella deceanglorum sp. nov., representing the Ungdarellaceae, an eatinct red algal family; and Exvotarisella maponi gen. et. sp. nov., representing the tribe Bereselleae of the family Dasycladaceae (green algae). U. deceanglorum is from the Visean of Wales, probably lower D2 Zone: E. maponi comes from the D2 Zone of Northumberland. Exvotarisella is considered to be structurally the most advanced genus of the Bereselleae.