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Spirulida
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Spirulida
Spirulida is an order of cephalopods comprising one extant species and several extinct taxa.
Fossil record
• Oldest representative: Carboniferous, though contested: see
Shimanskya
• Oldest uncontested representative: Late Jurassic ==Classification==
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
==References==
Source: Wikipedia ↗
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