Complementary Description and Range Extension of an Unusual Caligid Copepod Anchicaligus nautili (Willey, 1896) (Copepoda: Siphonostomatoida) Parasitizing the Endangered Deep-sea Cephalopod Nautilus pompilius Linnaeus, 1758 from the Indian Ocean

• Panakkool Thamban Aneesh ^[1] ; Ameri Kottarathil Helna ^[1] ; Meethal Parambath Prabhakaran ^[1] ; Raveendhiran Ravinesh ^[1] ; Appukuttannair Biju Kumar ^[1]
  1. [1] University of Kerala

     University of Kerala

     India

     
• Localización: Thalassas: An international journal of marine sciences, ISSN 0212-5919, Vol. 37, Nº. 2, 2021, págs. 757-766
• Idioma: inglés
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• Resumen

  • The present study reports an unusual caligid copepod, Anchicaligus nautili (Willey, 1896) infesting the deep-water chambered nautilus Nautilus pompilius Linnaeus, 1758 from the Indian Ocean. Both male and female are redescribed and illustrated based on the materials recovered from the museum collection of the Department of Aquatic Biology & Fisheries, University of Kerala, collected in March, 1985 from the Andaman region of the Indian Ocean as a trawl bycatch. The species is characterised by the presence of a pair of large lenses (conspicillae) in the median eyes, postanal-protrusions and the displacement of the caudal rami. It appears to be the first record of the species from Indian waters.