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Trididemnum orbiculatum(Van Name, 1902)Trididemnum orbiculatum

PhylumClassOrderFamilyGenusSpecies
UrochordataAscidiaceaAplousobranchiaDidemnidaeTrididemnumorbiculatum
Synonyms
Didemnum orbiculatum Van Name, 1902
Habitat
Found only on mangrove roots in Bocas del Toro.

Distribution
Panama, Belize, Curacao, Guadalupe, Bermuda and Brazil.

Natural History Notes
The color of the colony depends on the quantity of calcareous spicules on the surface.

Characteristics
The encrusting colony has white circles (calcareous spicules) around each dark zooid. The general color may be grayish or brown. The zooid is 1.0 mm and the larva 0.6 mm long.

Other Literature
Van Name, W.G. (1945) The North and South American ascidians Bull. Amer. Mus. Nat. Hist., 84: 1-476.

Rocha, R. M. & Moreno, T. R. 2000. Ascidians associated with Eudistoma carolinense Van Mame, 1945. With description of a new species of Polycarpa. Ophelia 52 (1): 9-16.

Rocha, R. M. & N. Y. K. Bonnet. 2009. Ascídias (Tunicata, Ascidiacea) introduzidas no Arquipélago de Alcatrazes, São Paulo. Iheringia, Sér. Zool., 99(1):27-35.

In Bocas Del Toro
Reported ByRocha, R. M., Faria, S. B., and Moreno, T. R.; Marine Invertebrate Taxonomy Workshop I, Bocas del Toro, August 2003.
Images
Trididemnum orbiculatum
Trididemnum orbiculatum
Links
Reference
Collin, R., Diaz, M. C., Norenburg, J., Rocha, R. M., Sanchez, J. A., Schulze, A., Schartz, M. and Valdes, A. (2005) Photographic Identification guide to some Common Marine Invertebrates of Bocas Del Toro, Panama. Caribbean Journal of Science 41(3), 638 - 707.

Rocha R.M., et al. Ascidians from Bocas del Toro, Panama. I. Biodiversity. Caribbean Journal of Science, Vol.41, No. 3, 600-612, 2005.
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