Phreatogammarus is a genus of amphipod crustaceans that are endemic to New Zealand. It is the only genus in the family Phreatogammaridae, and contains four species, three of which were described by Charles Chilton.
Read more about Phreatogammarus: Phreatogammarus Fragilis, Phreatogammarus Propinquus, Phreatogammarus Helmsii, Phreatogammarus Waipoua, Undescribed Species