Spirulida
Spirulida is an order of cephalopods comprising one extant species (Spirula spirula) and several extinct taxa.
| Spirulida | |
|---|---|
 | |
| Spirula spirula | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Superorder: | Decapodiformes |
| Order: | Spirulida Stolley, 1919 |
| Suborders | |
|
†Groenlandibelina | |
Fossil record
- Oldest representative: Carboniferous, though contested: see Shimanskya
- Oldest uncontested representative: Late Jurassic[1]
Classification
- Order Spirulida
- ?Family †Shimanskyidae
- Suborder †Groenlandibelina Khromov, 1990
- Family †Groenlandibelidae
- Family †Adygeyidae
- Suborder †Belopterina Engeser, 1998
- Family †Belemnoseidae
- Family †Belopteridae
- Suborder Spirulina Pompeckj, 1912
- Family †Spirulirostridae
- Family †Spirulirostrinidae
- Family Spirulidae
gollark: The reason I support *some* land-value-taxish thing is that nobody creates land, so reward from it should probably go to everyone.
gollark: The only big problem I can see with that is that you can't really have the property/developed stuff on that land separate from the land itself, at least with current technology and use of nonmovable stuff.
gollark: You wouldn't just say "each m² of land costs $0.0001/year in taxes", I think one interesting idea there is to have people *set* a value, have a % of that be taxed, but also force it to be sold at that price if someone wants it.
gollark: * lots of
gollark: Farming would only be really expensive if the land is worth money *anyway*.
References
- Fuchs, Dirk; Keupp, Helmut; Trask, PAT; Tanabe, Kazushige (2012). "Taxonomy, morphology and phylogeny of Late Cretaceous spirulid coleoids (Cephalopoda) from Greenland and Canada". Palaeontology. 55 (2): 285. doi:10.1111/j.1475-4983.2011.01125.x.
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