Halla Bergh, 1877 (Invalid: junior homonym of Halla Costa, 1844 [Annelida]; Hallaxa is a replacement name) Hallaxa is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod molluscs in the family Actinocyclidae.
Species in the genus Hallaxa include:[2][3][4][5]
This Heterobranchia-related article is a stub.
You can help Wikipedia by expanding it.