Marine Biodiversity

, Volume 49, Issue 2, pp 947–987 | Cite as

Deep-sea glass sponges (Hexactinellida) from polymetallic nodule fields in the Clarion-Clipperton Fracture Zone (CCFZ), northeastern Pacific: Part II—Hexasterophora

  • Daniel KerskenEmail author
  • Dorte Janussen
  • Pedro Martínez Arbizu
Original Paper


The Clarion-Clipperton Fracture Zone (CCFZ) in the northeastern Pacific is a potential area for deep-sea mining, comprises the worldwide largest polymetallic nodule fields and is one of the most difficult to sample and thus unknown ecosystems. Glass sponges (Hexactnellida) represent a main group of benthic deep-sea megafauna, especially hexasterophorid sponges, but only few studies have been published so far. This is the first study focusing on the taxonomy of hexasterophorid sponges from polymetallic nodule fields in the CCFZ and includes descriptions of eight known and six new species: Hyalostylus microfloricomus sp. nov.; Hyalostylus schulzei sp. nov.; Docosaccus nidulus sp. nov.; Holascus spinosus sp. nov.; Caulophacus (Caulophacus) wilsoni sp. nov.; and Chonelasma bispinula sp. nov.


Deep-sea sponges Deep-sea mining Manganese nodules Caulophacus Saccocalyx 



The EcoResponse cruise with RV Sonne was financed by the German Ministry of Education and Science (BMBF) as a contribution to the European project JPI-Oceans “Ecological Aspects of Deep-Sea Mining.” The authors acknowledge funding from BMBF under contract 03F0707E. Furthermore, we want to thank Prof. Dr. Jens Greinert and M.Sc. Florian Gausepohl (GEOMAR—Helmholtz Centre for Ocean Research, Kiel) for support with station maps.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed by the authors.

Sampling and field studies

All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements, if applicable.


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Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Daniel Kersken
    • 1
    • 2
    Email author
  • Dorte Janussen
    • 2
  • Pedro Martínez Arbizu
    • 1
  1. 1.German Centre for Marine Biodiversity Resarch (DZMB)WilhelmshavenGermany
  2. 2.Marine ZoologySenckenberg Research Institute and Nature MuseumFrankfurt am MainGermany

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