Abstract
Summary: An assemblage of hystrichospheres, which includes one new species of Micrhystridium , is described from two borehole cores through the Mansfield (Agir) Marine Band in the Yorkshire–Derbyshire–Nottinghamshire coalfield of England, The assemblage includes species of Baltisphaeridium, Cymatiosphaera, Micrhystridium and Veryhachium.

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