coenopterid

plural coenopterids

1. biologyA fern of the Coenopteridale order, which is a taxon that is no longer used, but which used to represent ferns from the Devonian period into the Permian.

   The early coenopterids had prefronds, as did the cladoxylaleans.

   1991, Frank Northen Magill, Magill's Survey of Science: Muscular contraction and relaxation, page 2295

   2 more examples

   Indeed, many of the coenopterids show little distinction between stem and leaf, and protostelic axes are rather common.

   1962, Theodore Delevoryas, Morphology and Evolution of Fossil Plants, page 79

   The Upper Devonian Rhacophyton until recently was considered a coenopterid fern […]

   1971, David W. Bierhorst, Morphology of Vascular Plants, page 123