Atriolum marinense

Kott, P. 2001
Phylum Chordata
Class Ascidiacea
Order Aplousobranchia
Family Didemnidae
  • Small orange dirty pink urn shaped lobes (2-3 cm long, 1-2 cm in diameter), attached by a common basal mass and form large colonies (5-15 cm in diameter).
  • Zooids (2-3mm long) arranged in systems, short branchial opening long atrial siphon.
  • Branchial aperture open on the outside of the urn shaped lobes, atrial opening on the inner surface into a large common cloacal cavity.
  • Colony fleshy with inner test translucent, spicules star-shaped with sharp points.
  • Branchial sac with 4 rows of 14-20 stigmata, no retractor muscle.
  • Gonads over the posterior end of gut loop, ova next to single testes follicles with sperm duct in 9-11 coils over it.
© 2010 Shirley Parker-Nance 2010-06-19 23-59-37_0038.JPG © 2010 Shirley Parker-Nance 2010-10-10 23-15-56_0035.JPG © 2012 Shirley Parker-Nance 2012-04-04 11-48-38_0130.JPG

  • Monniot, C.; Monniot, F.; Griffiths, C. and Schleyer, M. 2001 Ascidians of South Africa.108:1-141
  • Shenkar, N.; Gittenberger, A.; Ruis, M.; Rocha, R. M.; Swalla, B.; et al. 2017 Ascidiacea World Database. Atriolum marinense Kott, 2001. Accessed through: World Register of Marine Species at: on 2019-03-12