Abstract

Eomerismopedia maureeniae, a new palynomorph genus and species, is described from the lower Ordovician Coolibah Formation, Georgina Basin, Queensland Australia. Originally assigned to Gloeocapsomorpha prisca ZALESSKY 1917 emend. FOSTER, REED and WICANDER 1989, reexamination of this colonial palynomorph indicates that it is not G. prisca, but a fossil representative of the extant cyanobacterial family Chroococcaceae. Paleontological and sedimentological evidence indicates a subtidal and/or intertidal marine paleoenvironment for the Coolibah Formation, a setting consistent with the environment of modern growth of Merismopedia MEYEN 1839.

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