I am a brand new subscriber, having only learned what little I know about shells from a friend who has become quite interested in collecting this last year. It is actually for her that I am posting this plea for your assistance. She found in SC last fall what she has now identified as a heart urchin. She believes the scientific name to be moira atropos. She believes the class is echinoidea and the family schizasteridae. Would anyone be able to provide any information about this, particularly an author's name and the date it was named? Any other information you could provide about this specimen would be greatly appreciated. Many thanks. Carol Goodman