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Principal component analysis on morphological characteristics of specimens in P.variabilis sp. nov. (black circle), P.deformis (black triangle) and P.aff.deformis (black asterisk). Arrows indicate long diameter of calice (A), width of primary septa (B), number of teeth on septa (C), long diameter of columella (D), number of septa per calice (E), number of septa reaching columella (F).
