Carter, J. L. (1983). New brachiopods from the Gilmore City Limestone (Mississippian) of north-central Iowa. Annals of Carnegie Museum. 52(4): 59-78.
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Carter, J. L.
1983
New brachiopods from the Gilmore City Limestone (Mississippian) of north-central Iowa
Annals of Carnegie Museum
52(4): 59-78
Publication
Highly fossiliferous coquinoid lenses within the Cyathophyllum zone or uppermost Gilmore City Limestone have produced extremely diverse collections of small invertebrates. The brachiopod faunule from these collections consists of at least 18 spp. 3 of which are new and described herein. Two of the species are the basis for new and unusual genera. IOWARHYNCHUS mirandum, gen. et sp. nov. is a new tiny smooth rhynchonellid and GERKISPIRA spinosa, gen. et sp. nov., is a new impunctate costate spinose spiriferid. Setigerites facetus sp. nov. represents an early occurrence of a typically Visean genus.