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Doliolum denticulatum

Quoy and Gaimard (1834)

Download a fact sheet for Doliolum denticulatum (PDF 287KB)


Phylum Chordata
Class Thaliacea
Order Doliolida
Family Doliolidae
Genus Doliolum
Species denticulatum


  • Gonozooid length up to 10 mm
  • Nurse length up to 2 mm

Distinguishing characteristics

Gonozooid (Blastozooid)

  • 8 muscle bands
  • Dextral arched intestine
  • Gill slits are strongly arched from M2 dorsally to M5, then curving at 2/3 and running to M3 ventrally
  • Endostyle is short, from M2 to M4
  • Testis is long and swollen, situated horizontally in front of M3, sometimes beyond M2
  • Differentiated from D. nationalis by the length of the testes, the curved form of the gill slits and looking at where the gills are situated


  • 9 muscle bands
  • 4 pairs of gill slits
  • Dorso-ventral process is in relation to M7
  • Endostyle is from M2 to M5
  • Oesophage concavity is downwards
  • Intestinal tube is stretched sagittally


  • Barrel shaped, without visceral mass, except for a heart
  • Budding on the dorso-ventral processs
  • M2-M8 fused in a continuous sheet
  • Nurses of Doliolum nationalis and Doliolum denticulatum cannot be separated


  • Widespread in all oceans from 40°N to 40°S (following approximately the 10°C isotherm in the north and the 15°C isotherm in the south)



  • Boltovskoy, D. (Ed.) (2005). Zooplankton of South Atlantic, dvd ETI Bioinformatics.
  • Godeaux, J., Q. Bone and J.-C. Braconnot, 1998. Anatomy of Thaliacea. In: Q. Bone (ed.), 1998. The biology of pelagic tunicates. Oxford University Press, Oxford. pp 1-24.
  • Marine species identification portal,
  • van Couwelaar, M. (2003). Zooplankton and micronekton of the North Sea. Expert Center for Taxonomic Identification, Amsterdam.