nomenclatorial act:
protologue/first publication
Page:
1159
diagnosis:
Characters of genus those of family. Plants with orthotropic stems and plagiotropic lateral branches. Stomata in two adaxial bands on foliar leaves, distributed all across adaxial surface of bracts and sterile scales. Pollen cone with simple bracts with dentate margins; sterile scales linear, decurrent with dentate margins; sporophylls positioned adjacent to cone axis; prepollen elliptical-circular with bent monolete suture. Ovuliferous dwarf shoots free from simple bract; sterile scales simple, decurrent, linear, with dentate margins; sporophylls linear, fanning outward distally.
systematic position:
Spermatopsida, Voltziales
typeseries:
Type Species—Thucydia mahoningensis sp. nov.
Classification:
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