What is "pseudoalteromonas"

Pseudoalteromonas is a genus of marine bacterium. In 1995, Gauthier et al proposed Pseudoalteromonas as a new genus to be split from Alteromonas. The Pseudoalteromonas species that were described before 1995 were originally part of the Alteromonas genus, and were reassigned to Pseudoalteromonas based on the rRNA-DNA analysis done by Gauthier et al.