Mestosiphon parmelas Iredale, 1940

Mestosiphon parmelas was introduced by Iredale (1940: 437) as a nomen nudum without description (Art. 13.1 of the Code). It was not made available subsequently by Cernohorsky (1972: 210; synonym of S. atra), Morrison (1972: 57; no description) nor Short & Potter (1987: 122). It remains an unavailable name.