Halgerda apiculata   (Alder and Hancock)  (Sea Slug)
Organism information awaits expert curation
Class: Gastropoda

Size: 7 mm long by 3-5 mm wide and 2 mm high

Color: Dirty grey, darker in the central region of the dorsum and lighter elsewhere.

The back is covered with conical papilla, which is continued upwards as short spine-like projections, and from which radiate ridges. The central region has been rubbed somewhat bare, and exposed to rubbing the projections are removed from the papilla. Both the dorsum and foot are plentifully supplied with simple rod-like spicules, bluntly pointed at each end, which are irregularly arranged in bundles. The underside of the mantle is furnished with a reticulating series of fine lines. The foot is well developed and separated from the body by an outstanding flange its anterior margin is notched in the middle line. The branchial plumes are five in number. Both branchico and rhinophores are completely retractile within sheaths whose margins bear a series of speculate points.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Pamban INDIA
• Tamil Nadu, Gulf of Mannar INDIA

Literature Source(s)
  • O'Donoghue, CH (1932) Notes on Nudibranchiata from southern India Journal of Molluscan Studies The Malacological Society of London 20(3) 141-166 Available at - http://mollus.oxfordjournals.org/content/20/3/141.full.pdf+html
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2010-11-29

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