The seas of the Early Carboniferous were dominated by rugose corals, brachiopods, bryozoans, sharks, and the first bony fish.
Hexadecagon (Wikipedia) In mathematics, a hexadecagon (sometimes called a hexakaidecagon or 16-gon) is a sixteen-sided polygon.
Tetradecagon (Wikipedia) In geometry, a tetradecagon or tetrakaidecagon or 14-gon is a fourteen-sided polygon.
