Biogeography, Biodiversity and Systematics of Marine Cephalopods

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Ecology".

Deadline for manuscript submissions: 1 April 2026 | Viewed by 633

Special Issue Editors


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Guest Editor
One Health Institute, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
Interests: cephalopods; marine ecology; evolution; environment; ecology; biodiversity; biogeography; species diversity

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Guest Editor
Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepcion, Chile
Interests: invertebrate biology; early life history; biodiversity; molluscs; cephalopods

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Guest Editor
Centro de Investigación en Recursos Naturales y Sustentabilidad (CIRENYS), Facultad de Ciencias Médicas, Universidad Bernardo O’Higgins, Avenida Viel 1497, Santiago, Chile
Interests: molluscs; marine ecology; evolution; genetics; ecology; biodiversity; macroecology; biogeography; species diversity

Special Issue Information

Dear Colleagues,

Cephalopods are among the most dynamic and ecologically important marine invertebrates, occupying a wide range of habitats from coastal zones to the deep sea. This Special Issue aims to explore the biogeographic patterns, biodiversity, and systematics of cephalopods through integrative approaches that combine molecular phylogenetics, morphology, ecology, and biogeographic modeling. Historically understudied in many regions, cephalopods are now gaining attention due to their ecological importance and growing relevance in fisheries. We welcome cutting-edge research on species delimitation, population connectivity, evolutionary adaptations, and macroecological trends. Studies that bridge taxonomy with applied management or highlight underexplored taxa and regions are especially encouraged. Contributions may include original research, reviews, and case studies that advance our understanding of cephalopod diversity and distribution, particularly in the context of environmental change and conservation.

Dr. Christian Marcelo Ibáñez
Dr. Sergio A. Carrasco
Dr. María Cecilia Pardo-Gandarillas
Guest Editors

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Keywords

  • cephalopods
  • systematics
  • taxonomy
  • genetics
  • phylogeny
  • biodiversity
  • biogeography
  • species diversity

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Published Papers (1 paper)

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Research

16 pages, 2699 KB  
Article
New Insights into the Molecular Phylogeny of Graneledone (Cephalopoda, Megaleledonidae) and Description of a New Species from the Southeastern Pacific Ocean
by María Cecilia Pardo-Gandarillas and Christian M. Ibáñez
J. Mar. Sci. Eng. 2026, 14(3), 311; https://doi.org/10.3390/jmse14030311 - 5 Feb 2026
Abstract
Deep-sea octopuses of the genus Graneledone currently include ten recognized species, yet their phylogenetic relationships remain insufficiently resolved. Here, we provide molecular phylogenetic analyses for eight species based on three mitochondrial markers (16S, COIII, COI) and formally describe a new species from the [...] Read more.
Deep-sea octopuses of the genus Graneledone currently include ten recognized species, yet their phylogenetic relationships remain insufficiently resolved. Here, we provide molecular phylogenetic analyses for eight species based on three mitochondrial markers (16S, COIII, COI) and formally describe a new species from the southeastern Pacific off south-central Chile. Four specimens previously reported lacked evidence necessary for taxonomic validation; in this study, we examine eight additional individuals collected between 436 and 1482 m depth, generating new mitochondrial sequences and proposing an updated phylogenetic hypothesis for the genus. Species delimitation analyses strongly support the recognition of a new species. The newly described octopus is medium-sized, lacks an ink sac, and bears a single series of suckers on arms of similar length. Key diagnostic traits include 43–45 suckers on the hectocotylized (right third) arm, six to seven gill lamellae per demibranch, a VV-shaped funnel organ, and five to seven transverse folds on the ligula. Among all examined characters, the number of opposite suckers provides the most robust morphological distinction from congeners distributed across the Pacific, Atlantic, and Antarctic oceans. Our results highlight the value of integrative taxonomy in resolving species boundaries within Graneledone and reveal previously undocumented diversity in the deep Southeastern Pacific. Continued sampling and molecular analyses will be essential for identifying additional cryptic lineages and refining evolutionary hypotheses for this poorly explored deep-sea octopod lineage. Full article
(This article belongs to the Special Issue Biogeography, Biodiversity and Systematics of Marine Cephalopods)
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