meaning of subdivision coniferophytina
1. cone-bearing gymnosperms dating from the Carboniferous period; most are substantial trees; includes the classes Pinopsida subdivision Pinophytina and Ginkgopsida subdivision Ginkgophytina and Taxopsida subdivision Taxophytina which in turn include the surviving orders Coniferales and Taxales yews and sometimes Ginkgoales as well as extinct orders such as Cordaitales of the Carboniferous and Permian
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