Type Species
Enteroctopus membranaceus has often been regarded as type species of the genus, not because it was designated as such by Rochebrune and Mabille when they erected the genus, but because it was the first named species in the genus. Robson in his 1929 monograph of octopods regarded E. membranaceus as a species dubium because the original description was insufficient to identify an individual species, the holotype was an immature specimen, and the type specimen was no longer extant. As such, the genus was considered invalid until Hochberg resurrected it in 1998. Hochberg noted that Robson had considered E. membranaceus a junior synonym of E. megalocyathus, the second species assigned to the genus by Rochebrune and Mabille in their 1889 description. Additionally, since Rochebrune and Mabille did not actually assign type status to E. membranaceus, Hochberg concluded that Enteroctopus was indeed a valid genus and transferred type species status to E. megalocyathus by virtual monotypy.
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