Abstract
Pseudochromis erdmanni is described from eight specimens from Halmahera, Ambon and the Raja Ampat Islands, Indonesia. It is also recorded from Lembeh Strait, Sulawesi, on the basis of photographs. Pseudochromis erdmanni belongs to a clade of species with medially placed palatine tooth patches, which also includes P. colei Herre, P. howsoni Allen, P. moorei Fowler, P. quinquedentatus McCulloch, P. perspicillatus Gunther and P. steenei Gill & Randall. Based on derived coloration characters, P. erdmanni is nested within this group as the sister to P. steenei.
NSTL