Atelostomata

The Atelostomata are a superorder of sea urchins. They are distinguished from other sea urchins by their irregular shape and the absence of a feeding lantern. The group includes the well known heart urchins, as well as some less familiar and extinct forms.

Atelostomata
Temporal range: Lower Jurassic–recent
Echinocardium cordatum
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Subclass: Euechinoidea
Infraclass: Irregularia
Superorder: Atelostomata
von Zittel, 1879
Orders

Cassiduloida
Holasteroida
Spatangoida

List of orders
gollark: This isn't for sandboxing, though, just undoing what CraftOS does.
gollark: This is what mine does.
gollark: ```lua-- hacky magic to run our code and not the BIOS stuff-- this terminates the shell, which crashes the BIOS, which then causes an error, which is printed with printErrorlocal old_printError = _G.printErrorfunction _G.printError() _G.printError = old_printError -- Multishell must die. term.redirect(term.native()) multishell = nil term.setTextColor(colors.yellow) term.setBackgroundColor(colors.black) term.setCursorPos(1,1) term.clear() _G.polychoron = {version = version, process = process} polychoron.polychoron = polychoron polychoron.BSOD = BSOD for n, p in pairs(base_processes) do process.spawn(p, n) end os.queueEvent "event" -- so that processes get one free "tick" run_loop()end os.queueEvent "terminate"```
gollark: PotatOS's potatoscheduler uses a TLCO thing to escape this and run its own main loop.
gollark: Your ĸode is run in `parallel` along with `rednet.run` by default.

References
  • Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 981. ISBN 0-03-056747-5.
  • Kroh A, Mooi R (eds.). "Atelostomata". World Echinoidea Database. World Register of Marine Species.


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