Morphological features and internal structure of Stromatopora tuberculata 插畫檔

This plate illustrates several views of a reef-building organism found in the Devonian strata of Canada. The primary figure shows a life-sized portion of the under surface, featuring a wrinkled basement membrane and numerous small, circular openings which served as the entry points for water canals. A second, enlarged view of the upper surface reveals a dense pattern of small, pimple-like projections or tubercles that covered the living colony. Additionally, a highly magnified vertical cross-section displays the internal architecture, consisting of a series of horizontal layers supported by minute vertical pillars. These structural details characterize the organism as a member of an extinct group of calcareous sponges that played a vital role in the formation of ancient marine reefs.