Comprehensive Description

Read full entry


Colonies are usually thick crusts, divided into lobes. There are two colour forms, a white one and a pink one, this colour emanating from the test. The zooids are rather irregularly arranged around a series of large conspicuous cloacal openings in the upper surface of the colony. The six lobes of the oral siphon are heavily pigmented in white, as is the large atrial languet. The upper part of the branchial basket and endostyle are pigmented with white to a variable degree. 5mm thick x 20-50mm across. The most distinctive, conspicuous and easily recognised polyclinid. Most likely to be confused with Botryllus schlosseri or Botrylloides leachii, or with Sidnyum elegans. Aplidium proliferum is considered to be a distinct species by some authors. If it is a distinct entity then it looks very like Sidnyum elegans but has only 6 papillae around the oral siphon.


Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© National Museums Northern Ireland and its licensors

Source: Encyclopedia of Marine Life of Britain and Ireland

Belongs to 0 communities

This taxon hasn't been featured in any communities yet.

Learn more about Communities


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!