Diplosoma listerianum

Diplosoma listerianum (Milne-Edwards, 1841)

Common Names

Grey encrusting compound tunicate

Languages: English

Overview

Description

This species is a compound, colonial ascidian, with small, individual zooids embedded in a common matrix or tunic. The colony can grow extensively, forming soft, gelatinous sheets that measure 1-3 mm in thickness and up to several centimeters across. Individual zooids are very small, approximately 1-2 mm. The tunic lacks calcareous spicules, but often possesses white pigment flecks. Often translucent and either colorless or with a gray, light green, or tan hue.

Author(s): Frey, Melissa
Rights holder(s): Frey, Melissa

Description

Look Alikes

In the Northeast Pacific, Diplosoma listerianum is most similar to other soft or gelatinous, encrusting colonial tunicates, including species of Didemnum and Eudistoma.

Author(s): Frey, Melissa
Rights holder(s): Frey, Melissa

Ecology and Distribution

Distribution

Diplosoma listerianum has been recorded in the Northeast Pacific from British Columbia to California. This species also has been collected from numerous locations around the world, including the east coasts of North and South America, northern Europe and Great Britain, South Africa, Japan, New Zealand, and Hawaii. Its native geographical range remains unknown, and is considered cryptogenic.

Author(s): Frey, Melissa
Rights holder(s): Frey, Melissa

Taxonomy

  • Diplosoma macdonaldi Herdman, 1886 (synonym)

References

Carlton, J. T. (2007).  The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon. 1001. Berkeley and Los Angeles: University of California Press.
Lambert, C. C., & Lambert G. (1998).  Non-indigenous ascidians in southern California harbors and marinas. Marine Biology. 130, 675-688.
Ruiz, G. M., Fofonoff P. W., Steves B., Foss S. F., & Shiba S. N. (2011).  Marine invasion history and vector analysis of California: a hotspot for western North America. Diversity and Distributions. 17, 362-373.