Idiosepiidae is a family of

mollusc Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...

in the class

Cephalopod A cephalopod is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head ...

a. This family appears to be related to the

cuttlefish Cuttlefish or cuttles are marine molluscs of the order Sepiida. They belong to the class Cephalopoda which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone, which is used for control of ...

in the order Sepiida and the bobtail squid in the order Sepiolida but the exact placement of this family within the Decapodiformes is '' incertae sedis''. The family includes the species Idiosepius pygmaeus (Tropical Pigmy squid).

Genera

*'' Idiosepius'' Steenstrup, 1881Steenstrup, J. (1881). ''Sepiadarium'' og ''Idiosepius'' to nye Slægter af Sepiernes Familie. Med Bemaerkninger om de to beslaegtede former Sepiolidea D'Orb. og ''Spirula'' Lmk. ''Det Kongelige Danske videnskabernes selskabs skrifter; Naturvidenskabelig og mathematisk afdeling'', 1(3), 211–242. *'' Xipholeptos'' Reid & Strugnell, 2018Reid, A. L. & Strugnell, J. M. (2018). A new pygmy squid, ''Idiosepius hallami'' n. sp. (Cephalopoda: Idiosepiidae) from eastern Australia and elevation of the southern endemic ‘''notoides''’ clade to a new genus, ''Xipholeptos'' n. gen. ''Zootaxa'', 4369(4), 451–486.

References

Bobtail squid Taxa named by Adolf Appellöf {{cephalopod-stub