Here are some pictures of a coral fossil known as Thecia minor (Rominger). They are found in the Louisville Limestone of Jefferson County, Kentucky USA. The fossils date to the Silurian Period. They were once part of the collection of southern Indiana paleontologist George K. Greene (1835-1917). It appeared that all of Greene's fossil collection was sold to American Museum of Natural History in New York City after his death but as it turns out there was one cabinet that was not sold and was past down to his descendants.
These fossils are now on display at the Falls of the Ohio State Park Interpretive Center till September 2024 after that it will be transferred to the Indiana State Museum. George Greene's great-great-grandson William "Bill" Bishop passed away on November 29, 2023 and his wish that fossils be donated.