Sepioteuthis lessoniana 
Bigfin Reef Squid
Sepioteuthis lessoniana


Where Does Sepioteuthis lessoniana Fit?

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

sepioteuthis lessonianaCephalopoda 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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Cephalopod Phylogenic TreePhylogeny

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.




mitochondrial phyologeny

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.