S

Marrocanium

Octoedryxium

Polyedryxium

Prasinophyceae

Oomorpitae (oon = egg-shaped)

Nothooidium

Ooidium

?

FIGURE 4.78 Basic acritarch morphology. (Modified from Montenari and Leppig, 2003.)

FIGURE 4.78 Basic acritarch morphology. (Modified from Montenari and Leppig, 2003.)

(Smelror, 1987; Montenari and Leppig, 2003) and as indicators of climatic change (Mohr, 1990). In addition, acritarchs have been useful as paleoecological indicators of specific marine environments. For example, Staplin (1961) used several acritarch associations to predict distances from reefs in the Upper Devonian of Canada.

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