Fig. 1: Microphotographs of A. tetragonala specimens.
From: Intracellular bound chlorophyll residues identify 1 Gyr-old fossils as eukaryotic algae
a–g Branched specimens with node cell, equal-diameter branches, lanceolate folds (lf), and intracellular inclusions (ICI). h, i Uniseriate filaments of the microfossils j, Sketch of A. tetragonala, displaying the main features of the microfossil. Black stars correspond to specimens that have been analysed by SR-μXRF.
