Sometimes species are misidentified, and this can cause a bit of trouble when doing taxonomic work. It's nice that we have experts who are able to face such problems and clean up the "mess".
That is what bryozoan experts Piotr Kuklinski and Paul Taylor did in 2006 (Kuklinski & Taylor, 2006) when they described Callopora weslawski. Previously, this species had been misidentified as Flustrellaria whiteavesi, a bryozoan belonging to the same family (Calloporidae). However, C. weslawski was described as a separate species after the 2006 revision.
It differs from many other Calloporids in that it has en extra row of smaller spines on the "side" of the zooid (see the picture below). Callopora weslawski is actually not registered in the species name list at the Norwegian Biodiversity Information Centre, so this is a great find for our project!
References:
Kuklinski, Piotr & Taylor, Paul. (2006). A new genus and some cryptic species of Arctic and boreal calloporid cheilostome bryozoans. Journal of the Marine Biological Association of the United Kingdom. 86. 1035 - 1046. 10.1017/S0025315406014019.