Bathyteuthis shares some characters with oegopsid squid and others with the Myopsida, hence its placement in a separate suborder, the Bathyteuthoidea, by some authorities.
The paired oviducts (in females) and suckers without circularis muscles are characteristic of ordinary Oegopsida.
However, buccal connective tissue with suckers and tentacle pockets in the head are characters found in myopsid squid, but absent in the Oegopsida.
Bathyteuthis shares some characters with oegopsid squid and others with the Myopsida, hence its placement in a separate suborder, the Bathyteuthoidea, by some authorities. The paired oviducts (in females) and suckers without circularis muscles are characteristic of ordinary Oegopsida. However, buccal connective tissue with suckers and tentacle pockets in the head are characters found in myopsid squid, but absent in the Oegopsida.
Bathyteuthis