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Author:
Ravn,R.L.
Year:
1986
Title:
Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa
Reference:
Ravn,R.L. (1986) Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa Iowa Geological Survey,Technical Paper # 7 P. 1- 244
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Genus Species Country(Region) From To
Hymenospora Hymenospora multirugosa Iowa Morrowan Desmoinesian
Hymenospora Hymenospora paucirugosa Iowa Desmoinesian
Illinites Illinites unicus Iowa Morrowan Desmoinesian
Indospora Indospora boleta Iowa Atokan
Kewaneesporites Kewaneesporites appressus sp. nov. Iowa Middle Pennsylvanian
Kewaneesporites Kewaneesporites patulus Iowa Morrowan Atokan
Knoxisporites Knoxisporites dissidius Iowa Morrowan
Knoxisporites Knoxisporites seniradiatus Iowa Middle Pennsylvanian
Knoxisporites Knoxisporites stephanophorus Iowa Morrowan
Knoxisporites Knoxisporites triradiatus Iowa Morrowan Atokan
Kosankeisporites Kosankeisporites elegans Iowa Morrowan Desmoinesian
Lacinitriletes Lacinitriletes badamensis India(Bihar) Permian
Laevigatisporites Laevigatisporites gracilis Iowa Middle Pennsylvanian
Laevigatisporites Laevigatisporites gracilis China(Liaoning) Neocomian Albian
Laevigatisporites Laevigatisporites sphaerotriangulus Iowa Middle Pennsylvanian
Laevigatisporites Laevigatisporites sporadicus Iowa Middle Pennsylvanian
Laevigatosporites Laevigatosporites contactus Iowa Morrowan