Cryptic species and their interactions are challenging to describe owing to the difficulties in observing and sampling their populations. Such methodological hurdles are critical to resolve, especially when important interactions involving poorly described

We have assessed for the first time the phylogenetic relationships and biogeographic history of the crabs of the genus Maja that inhabit European coasts: M. brachydactyla, M. crispata, M. goltziana and M. squinado. Using mitochondrial markers, we have

The Majoidea contains either six, seven, or eight valid families according to different sources. This has resulted in difficulties with the taxonomy and conservation of this superfamily. The Majoidea in Indonesia waters were documented in the past, however,