The Evolutionary Characteristics of Lower Permian Keziliqiman Reefs in the Southwest Margin of Tarim Basin, Northwest China

Figure 7

Bryozoans. (a) Fenestella, with distinct fenestrule and zooecia and accessory organisms such as Fusulinina; (b) Fenestella, with distinct fenestrule and zooecia; (c) the Polypora fragments, connected by filament calcite; (d) Fenestella, whose zooecia are connected to form a major “necklace” that forks out into several minor ones; (e) Ptilodictyina, with bilayer symmetrical zoaria.

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