Figure 1. From Porter and Riedman (2016). Lanulatisphaera laufeldii from Chuar Group, Grand Canyon, USA –showing possible ontogenetic variation with progressively longer filamentous processes on exterior of inner vesicle. Genus Lanulatisphaera Porter and Riedman 2016 Type Species.—Lanulatisphaera laufeldii (Vidal, 1976) Porter and Riedman 2016. Diagnosis.—as for type species. Etymology.—From the Latin lanulata, a diminutive for ‘woolly,’…

This section of the site is devoted to the profiles of the actors in our play– the Precambrian microfossils. The most common Precambrian microfossils fall into a group known as the acritarchs. This is a broad group of any single-celled, organic-walled (read: no hard parts like shells), vaguely spheroidal (before preservation) microfossil whose biological placement…