Marine Biodiversity

, Volume 46, Issue 3, pp 641–653 | Cite as

Distribution and comments on the morphology of Centroscymnus owstonii Garman, 1906 (Squaliformes: Somniosidae), with focus on its occurrence in the Indian Ocean

  • Simon Weigmann
  • Diego F. B. Vaz
  • William T. White
  • Marcelo R. de Carvalho
  • Ralf Thiel
Original Paper

Abstract

The Roughskin Dogfish Centroscymnus owstonii is one of the most widespread deepwater shark species, but its global distribution is mostly based on patchy records. In this study, C. owstonii was reinvestigated with focus on its poorly known distribution in the western and eastern Indian Ocean. Previous records of the species from the Seychelles, which, for decades, were considered to be of a different species, were verified in this study. Furthermore, the first records from off Reunion Island, Madagascar, and Indonesia are provided, including the smallest free-swimming specimen of the species described in detail to date. Based on these specimens, a description of C. owstonii is given with updated and extended morphometric data, photographic documentation and scanning electron microscopy (SEM) images of dermal denticles. Additionally, specimens from the Indian Ocean are compared with specimens from the Pacific and Atlantic Oceans. For the Pacific Ocean, the first record from the central western North Pacific is provided from the Hawaiian-Emperor seamount chain. This record also represents the most open ocean known occurrence of C. owstonii.

Keywords

Chondrichthyes Roughskin dogfish Deepwater Western Indian Ocean Indonesia 

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Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Simon Weigmann
    • 1
  • Diego F. B. Vaz
    • 2
    • 3
  • William T. White
    • 4
  • Marcelo R. de Carvalho
    • 3
  • Ralf Thiel
    • 1
  1. 1.Center of Natural HistoryUniversity of HamburgHamburgGermany
  2. 2.Virginia Institute of Marine ScienceCollege of William and MaryGloucester PointUSA
  3. 3.Departamento de Zoologia, Instituto de BiociênciasUniversidade de São PauloSão PauloBrazil
  4. 4.CSIRO Marine and Atmospheric Research, Wealth from Oceans FlagshipHobartAustralia

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