Qingjiangonema cambria from the Qingjiang biota. (IMAGE)
Caption
(a) Optical photograph of a soft-bodied macrofossil (specimen No. cy266) of unknown affinity, with abundant filamentous microfossils of Q. cambria (b–g) present on the surface. (b) SEM image of rod-shaped cells, photographed after acid maceration, showing equimorphic and equidimensional microcrystals within each cell. (c) SEM image, showing a cell embedded in claystone sediments. (d, e) BSEM images, showing multicellular filaments. (f) SEM image of a four-cell filament, showing elongated cells with a division groove at the mid length (arrows). (i) BSEM image of a filament composed of cells of variable length; note constrictions between neighboring cells.
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