Calceolispongia (literally "shoe sponge") is a diverse genus of cladid crinoids that lived along the shores of eastern Pangaea that correspond to Timor and Western Australia, today.[1]
When the first fossils were discovered, they were mistakenly thought to be sponges, hence the generic name.[2] Later, similarly shaped fossils were found, and (correctly) identified as those of a crinoid, and named "Dinocrinus." ("Terrible Lily") It was soon realized that Dinocrinus and Calceolispongia were the same, and Dinocrinus is now regarded as a junior synonym.