Spirulida
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Spirulida is an order of cephalopods comprising one extant species (Spirula spirula) and several extinct taxa.
Fossil record
- Oldest representative: Carboniferous, though contested: see Shimanskya
- Oldest uncontested representative: Late Jurassic
Classification
Taxa marked with † are extinct.
- 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