Domain Eukarya
Organisms in the Eukarya domain have cells are made up of many different things that are bound together by a membrane.
Kingdom Animalia
Organisms are multicellular. Cells lack a cell wall making them more flexible to move around.
Phylum Molluscs
Molluscs are soft bodied invertebrates that posses a tongue like structure called a radula. Most Molluscs have shells, except for the squid. They are known for their extreme cephalization.
Class Cephalopoda
Cephalopoda have extreme nervous development,
predacious and a closed circulatory
system.
Order Teuthida
All organisms in the order Teuthida are marine squid.
Family Loligidae
Consists of mostly of squid that occupy waters that cover the continental shelves. They all have a cornea that covers the lens of each eye.
Genus Sepioteuthis
Broad, posterior rounded mantle and fins that extend the full length of the mantle. Compared to other Loliginids, Sepioteuthis lay much larger eggs.
Species Sepioteuthis lessoniana
One of three Sepioteuthis species.
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Phylogeny
This Cephalopod phylogenetic tree was based upon the amino acid and codon- substitution analyses studied by Akasaki, et al.
Sepioteuthis lessoniana is within the Sepioteuthis branch.
The phylogenic tree above is based upon mitochondrial gene arrangement within the Cephalopod class. This study was based on the studies of Akasaki, et al.
Sepioteuthis lessoniana is found within the Sepioteuthis branch.