Isocrinus
Species
Isocrinus knighti Springer, 1909
Occurrence: Sundance
Originally named Pentacrinus asteriscus Meek and Hayden, 1858
Reference: Clark, 1915
![Specimen Photo](IsocrinusKnightiClark.jpg)
Isocrinus knighti
Drawing from Clark, 1915
Isocrinus wyomingensis Koch, 1962
Occurrence: Redwater
Reference: Koch, 1962; Mentioned in Hunter and Zonneveld, 2008