not an Actinotrocha Silén, 1954

Adult: Phoronis ovalis Wright, 1856.

° References of the most recent published diagnoses


Last update: 1982  

The embryo leaves the parental tube of Phoronis ovalis as slug-like larva (this is not an actinotroch) for a short pelagic life (some days) before settling, and boring into a carbonate substrate.
The only description is from Silén (1954). Internal anatomy is unknown. However from some unpublihed data this anatomy appears rather similar to those of the classic actinotroch larvae.

  •  Most recent diagnoses

    Grobe P. & T. Bartolomaeus, 2007. The coelomic origin and phylogenetic affinities of the Phoronida. 100. Jahresversammlung der Deutschen Zoologischen Gesellschaft (Köln, 2007), Abstract, p, 38.

  •  Emig C. C., 1982. The biology of Phoronida. Adv. mar. Biol., 19, 1-89.

  •  Silén L., 1954. Developmental biology of Phoronidea of the Gullmar Fiord area (West coast of Sweden). Act. Zool., 35, 215-257.
  • References on the larva of Phoronis ovalis