| Summary: | Cephalopod International Advisory Council Conference (CIAC 2018) : Cephalopod Research Across Scales: From Molecules to Ecosystems, 12-16 November 2018, St. Petersburg, Florida, USA.-- 1 page The cirrate octopods are typical cephalopods inhabiting at deep sea, there are collected in few numbers, and together with their gelatinous and delicate consistence, situates this group in constant taxonomic revision. In this study, we compare morphological and mitochondrial gene 16S rRNA data of cirrate specimens belonging to the genus Opisthoteuthis collected from SE Pacific, off Chile. Morphometry of fixed cirrate octopods were performed for specimens recently collected and also for specimens from the Museo Nacional de Historia Natural, Santiago, Chile. Additionally, we sequenced Opisthoteuthis chathamensisand O. merofrom SW Pacific as well as Cirroctopus glacialis from Antarctic waters. Morphological examination suggests specimens collected from SE Pacific belong to O. bruuni. Molecular phylogenetic,analysis using Parsimony, Maximum Likelihood and Bayesian inference, confirms the status of Opisthoteuthis bruunifrom SE Pacific as member of the family Opisthoteuthidade and phylogenetic comparisons with species from GenBank support the hypothesis for the existence of four families of cirrate octopods: Cirroctopodidae, Cirroteuthidae,Grimpoteuthidae and Opisthoteuthidae Peer Reviewed
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