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Mukkattu Nazar Suhaana, Jaime Gómez-Gutiérrez, Paravanparambil Rajakumar Jayachandran, Punnakkal Hari Praved, Sivasankaran Bijoy Nandan. A Review on the parasitic isopod genus Notophryxus G O Sars, 1883 (Crustacea: Isopoda), and first report of Notophryxus globularis G O Sars, 1885 from Lakshadweep Sea (Amini Island)[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-023-2217-3
Citation: Mukkattu Nazar Suhaana, Jaime Gómez-Gutiérrez, Paravanparambil Rajakumar Jayachandran, Punnakkal Hari Praved, Sivasankaran Bijoy Nandan. A Review on the parasitic isopod genus Notophryxus G O Sars, 1883 (Crustacea: Isopoda), and first report of Notophryxus globularis G O Sars, 1885 from Lakshadweep Sea (Amini Island)[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-023-2217-3

A Review on the parasitic isopod genus Notophryxus G O Sars, 1883 (Crustacea: Isopoda), and first report of Notophryxus globularis G O Sars, 1885 from Lakshadweep Sea (Amini Island)

doi: 10.1007/s13131-023-2217-3
  • Received Date: 2022-11-27
  • Accepted Date: 2023-04-19
  • Available Online: 2024-03-15
  • Isopod crustaceans of the family Dajidae are exclusively marine ectoparasites. The genus Notophryxus G. O. Sars, 1883 currently includes nine nominal species, which are very rarely reported as the chances for encountering these specimens are unpredictable. Our comprehension of the taxonomy, biology, ecology, and life cycle of species belonging to the Notophryxus genus is notably lacking. All nominal species of Notophryxus genus are reviewed here to obtain a comprehensive and integrative taxonomic understanding of this genus, in an attempt to address the lacunae. This paper also documents the rediscovery of an ectoparasitic isopod from the genus Notophryxus in Indian waters, after 55 years. Adult isopod specimens obtained from the outer reefs of Amini Island in the Lakshadweep archipelago, Southeastern Arabian Sea, display morphological congruence to Notophryxus globularis G.O. Sars, 1885. The only previous report on this species dates back to 1885 from G.O. Sars' description of N. globularis as an ectoparasite on the euphausiid Thysanoessa gregaria G.O. Sars, 1883 in the North Pacific. This discovery represents a range extension of N. globularis from the North Pacific to the Arabian Sea. Two cryptoniscid larvae and three adult females of N. globularis (with dwarf males) were found attached to four adult mysid specimens of Siriella aequiremis Hansen, 1910. The present study provides an improved diagnosis of N. globularis with the aid of light microscopy images and line drawings which was not given in the original G O Sars, 1885 report. This research also provides a concise description of cryptoniscid larvae from the same sampling location and same host which is most likely to be N. globularis larvae.
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