Idiomysis inermis   W. Tattersall,  1922 (Mysid)
Organism information awaits expert curation
Class: Malacostraca

Size: Length 4 mm.

Body robust, characteristically flexed. Frontal plate large, broadly rounded. Eyes very large with stout stalk. Male lobe on antennular peduncle well developed and densely hairy. Antennal scale very short and broad, without distal partition, greater part of outer border smooth, without apical spine. Exopod of second maxilla reduced in size. Tarsus of thoracic endopods 3, 4, 6, 7 and 8 undivided, endopod of fifth limb longer than all the others, with two-jointed tarsus and prominent nail. Eighth endopod much reduced, shorter than exopod. Telson very short, a broad triangular unarmed plate. Uropods short and robust, subequal, without spines, statocyst large. Pleopods 1-3 and 5 of male small unjointed plates, fourth with a basal joint carrying a one-jointed endopod and large exopod terminating in a very long seta, annulose at the tip.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Gulf of Mannar INDIA (Record: 1965)
• Arabian Sea INDIA

Literature Source(s)
  • Daniel, BA; Molur, S and Walker,S (1998) Report of the workshop conservation assessment and management plan for selected invertebrates of southern India Zoo Outreach Organization, Coimbatore, India 25569 Available at - NCL, Pune
  • Pillai, NK (1967) A review of the work on the shallow water Mysidacea of the Indian waters Proceedings of the symposium on Crustacea Part V, Series 2 Marine Biological Association of India 1681-1728 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Pillai, NK (1964) Report on the Mysidacea in the collections of the central marine fisheries research institute, Mandapam camp, South India-Part I Journal of the marine biological association of India 6(1) 1-36 Available at - NIO, Goa

Page last updated on:2011-05-27

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