 He determined that, with the exception of "I. carneola", the crystallizations were similar in all instances.The crystals of "I. carneola" were in the shape of small regular parallelepipeds—clearly distinct from the spiny crystal structures characteristic of the rest of "Incrustoporia".Because "Skeletocutis" was published earlier, it had priority over the generic name "Incrustoporia", and so Keller transferred the remaining six species to "Skeletocutis" in 1989