Orthopyxis asymmetrica is a very small stolonal species of hydroid. It was found growing
on the leaf of Posidonia oceanica. It is considered a Mediterranean endemic. Some
sources consider this taxon as a junior synonym of Orthopyxis integra.
This specimen was identified and described in moredetail (p. 192/3 & Fig. 6m-n)in the
following paper published (2013) by Soto Àngel and Peña Cantero.