Note on rare knot worm, Polygordius madrasensis Aiyar and Alikunhi, 1944 (Polychaeta, Polygordiidae) from India

Authors

  • Naduvilakkandy Vishnudattan
     Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Cochin - 682016, Kerala
  • Paravanparambil Rajakumar Jayachandran
     Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Cochin - 682016, Kerala
  • Sivasankaran Bijoy Nandan
     Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Cochin - 682016, Kerala

DOI:

https://doi.org/10.26515/rzsi/v122/i3/2022/167818

Keywords:

Interstitial, Intertidal, Kerala, Marine Annelids, Meiofauna

Abstract

Polygordius species is a clade of smooth bodied marine annelids, which are the main inhabitants of sandy intertidal sediments. They are well adapted for life in interstitial habitats. They have a habit of tying themselves in knots when collected, giving rise to the common name “knot wormâ€. Due to comparative morphological appearances among Polygordius species and its resemblance with nematodes and nemerteans made its taxonomy more challenging and required more advanced microscopic and molecular techniques. Only two species and a subspecies, primarily restricted to the south coast, have been recorded from Indian waters. This study mainly discusses the Indian species, with additional information on Polygordius madrasensis Aiyar and Alikunhi, 1944, based on Scanning Electron Microscopy (SEM) results.

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Published

2022-09-02

How to Cite

Vishnudattan, N., Rajakumar Jayachandran, P., & Bijoy Nandan, S. (2022). Note on rare knot worm, <i>Polygordius madrasensis</i> Aiyar and Alikunhi, 1944 (Polychaeta, Polygordiidae) from India. Records of the Zoological Survey of India, 122(3), 267–273. https://doi.org/10.26515/rzsi/v122/i3/2022/167818

Issue

Volume 122, Issue 3, 2022

Section

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