Editorial: recent advances in the knowledge of cephalopod biodiversity

First detection of an ocellate octopus in the Revillagigedos ecoregion, a biodiversity hotspot located in the Tropical East Pacific Province

“…In this study we analyzed octopuses from the Revillagigedo Archipelago in an attempt to increase knowledge concerning cephalopods in this geographic area. We identified the octopuses to the species level primarily, according to their morphological attributes, and secondarily, using partial sequences of COIII and COI genes following Vecchione et al (2017). The individuals were identified as Octopus oculifer (Hoyle, 1904) based on morphological and molecular examinations; however, the overlap of characters among the species reviewed in literature, especially between O. oculifer and O. hubbsorum, and the slight variation of arm formula in regard to original description (i.e., 3>4>2>1 instead of 3>2>4>1), explained why Jereb et al (2016) pointed out that these species are a confusing complex that needs to be carefully re-evaluated (Table 3).…”

Preface: Recent advances in knowledge of the life of cephalopods

“…This symposium was preceded by five workshops held in parallel (8-9 Nov.) and a mini-workshop (6-7 Nov.), all held at the excellent facilities of the recently completed Hakodate Research Centre for Fisheries and Oceans. The fruits of this conference include the papers compiled for this special section of Hydrobiologia, along with those published in companion special issues of Marine Biodiversity (Vecchione et al, 2017), and the Journal of Natural History (Allcock et al, 2017).…”