Spirulida

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

 * 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