Marine Biodiversity

, Volume 49, Issue 4, pp 1987–1996 | Cite as

Coelosphaera (Coelosphaera) koltuni sp. nov. (Porifera: Demospongiae): a new species from South Orkney Islands, Antarctica

  • Laura SchejterEmail author
  • Javier Cristobo
  • Pilar Ríos
Original Paper


In this work, we describe a new sponge species belonging to the genus Coelosphaera Thomson, 1873. It was collected during an Argentinean Summer Antarctic Research Cruise onboard the Research Vessel “Puerto Deseado” in March 2014, near South Orkney Islands (Antarctica), 60° 53′ S 42° 35′ W, 487-m depth. Coelosphaera (Coelosphaera) koltuni sp. nov. is a globular, fistular and hollow-shaped sponge, with significantly larger megascleres (almost twice the length) than other Antarctic and New Zealand Coelosphaera species. We provide comparative data of all the described Coelosphaera species, especially those from nearby regions.


Sponges Poecilosclerida New species description Antarctic waters 



Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”


Invertebrates’ collection of MACN


Instituto Español de Oceanografía, Spain


Instituto Nacional de Investigación y Desarrollo Pesquero, Argentina



The authors would like to thank Esteban Gaitán and Hugo Merlo for their valuable effort during sampling onboard de RV “Puerto Deseado”, as well as the rest of the crew, and to Mónica Oppedisano (Mar del Plata University) and Alfredo Quintana (Universidad Oviedo) for their technical assistance during SEM image acquisition. In addition, we would we like to acknowledge the kind assistance of Olga Bozhenova for the information pertaining to Koltun’s specimens in the Zoological Institute of the Russian Academy of Sciences, Saint Petersburg. The authors would like to thank Elena Isla and Christine Morrow for the careful revision of English. This is INIDEP Contribution N°2167.


This study was partially funded by Instituto Nacional de Investigación y Desarrollo Pesquero, Dirección Nacional del Antártico (Argentina) and PICT 2013-0629 to LS. LS is a reseacher at Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina. JC and PR are researchers at Instituto Español de Oceanografía, Spain.

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 for the Madibenthos Survey and the authors from the competent authorities and are mentioned in the Acknowledgements.

Data availability

All data generated or analysed during this study are included in this published article.


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Copyright information

© Senckenberg Gesellschaft für Naturforschung 2019

Authors and Affiliations

  1. 1.Instituto de Investigaciones Marinas y Costeras (IIMyC-CONICET) and Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)Mar del PlataArgentina
  2. 2.Centro Oceanográfico de GijónInstituto Español de OceanografíaGijónSpain
  3. 3.Departamento de Zoología y Antropología FísicaUniversidad de AlcaláMadridSpain

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