Echinoderms are extremely poorly represented in the materia medica. Very few provings have been conducted, and even those still have very limited pictures available. Multiple categories of echinoderms such as sand dollars have not even been potentised. Others, such as feather stars, sea cucumbers and sea stars all have either one or two species potentised. So far, sea urchins are the only class of echinoderms with many potentised species. Other Echinozoa beside the sea Urchins are very poorly known.
In short, provings or triturations of any echinoderms are sorely needed. Several interesting species and groups exist, which may give interesting provings[i]. Elasmopodida, sea cucumbers which actively swim, and resemble jellyfish, leading a floating lifestyle. Of this order, one species Pelagothuria natatrix has a fascinating umbrella like swimming structure, remebling cephalopods or Medusal Cnidarians. The sunflower star (Pycnopodia helianthoides) is the largest species of sea star. The Pincushion starfish (Culcita novaeguineae) create a habitat for multiple organisms, such as shrimp and small fish. The Blue Sea Star (Linckia laevigata) is a fascinating sea star, living on carrion. Another sea cucumber known as the Sea Pig (Scotoplanes globosa) is an common deep sea scavenger. The Giant Sea Cucumber (Parastichopus californicus) is a very large sea cucumber native to the pacific coast of North America.
A final suggestion for proving relates to the recent die offs of sea stars on the pacific coast in recent years. While originally speculated to have been due to radiation from the Fukushima disaster, it has been largely accepted that the cause is a virus, specifically a densovirus[ii]. This virus causes sea stars to lose structural integrity, and literally to fall apart. This disease seems closely linked to the Homeopathic themes of Echinoderms, and so a proving of this nosode seems warranted, and even urgent. The mass use of this nosode could potentially avert or reduce the toll of this disease. This nosode could also prove useful for many of the immune collapse disorders with which we are presented today.
[i] Thanks to the following websites for the following suggestions:
http://www.mnn.com/earth-matters/animals/stories/19-bizarre-and-beautiful-starfish-species
[ii] Hewson et al. Densovirus associated with sea star wasting disease and mass mortality. PNAS 111 (48): 17278-83..