Abstract
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.
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Data Availability
All the specimens herein studied were deposited at the National Zoological Collections of Zoological Survey of India, Kozhikode (NZC-ZSIK) and accession numbers for material are provided.
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Acknowledgements
PTA thankfully acknowledge Dr. DS Kothari Post-Doctoral Fellowship (No.F.4-2/2006 (BSR)/BL/16-17/0401; dated: 28th August 2017) awarded by University Grants Commission.
Funding
This work was supported by the University Grants Commission [No.F.4–2/2006 (BSR)/BL/16–17/0401; dated: 28th August 2017].
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PTA is the main worker on the topic, identified, worked on illustrations and pictures and prepared the draft of the manuscript. PTA, AKH, and AB conceived and designed research, critically reviewed for improving the quality of the manuscript. MPP and RR identified the host mollusc. All authors read and approved the final manuscript.
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Aneesh, P.T., Helna, A.K., Prabhakaran, M.P. et al. 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. Thalassas 37, 757–766 (2021). https://doi.org/10.1007/s41208-021-00331-2
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DOI: https://doi.org/10.1007/s41208-021-00331-2