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. Author manuscript; available in PMC: 2021 Dec 13.
Published in final edited form as: Nat Ecol Evol. 2020 Feb 24;4(4):543–549. doi: 10.1038/s41559-020-1122-9

Extended Data Fig. 5. Heteromorphic cells (a–l) and reproductive cells (m–o) of P. antiquus.

Extended Data Fig. 5

a–l, Filaments with globose (yellow arrowheads), clavate (black arrowheads), doliform (cyan arrowheads), and cyathiform (blue arrowhead) heteromorphic cells. b, k are magnifications of labeled frames in a and j, respectively. VPIGM-4774, VPIGM-4775, VPIGM-4776, VPIGM-4777, VPIGM-4778, VPIGM-4779, VPIGM-4780, VPIGM-4781, VPIGM-4782, and VPIGM-4783, respectively. m–o, Inferred reproductive cells with minute lateral pores (blue arrows), possibly representing openings through which reproductive gametes or zoospores were released. VPIGM-4784, VPIGM-4785, and VPIGM-4786, respectively. Specimens in a and j were photographed on bedding surface, and all other specimens were extracted from the rock matrix using HF acid maceration technique. All scale bars equal 100 μm unless otherwise specified. All photos taken by authors.