Classification of the genus Graffhamicrinus
G. †Graffhamicrinus Strimple 1961
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†Graffhamicrinus acutus Strimple 1961
†Graffhamicrinus boellstorffi Pabian and Strimple 1974
†Graffhamicrinus crassus Wanner 1924
†Graffhamicrinus magnijkus Strimple 1947
†Graffhamicrinus subcoronatus Moore and Plummer 1940
†Graffhamicrinus waughi Moore and Strimple 1941