Ramellogammarus

Freshwater creeks and tributaries. R. similimanus has been observed in small freshwater streams within the Portland metropolitan area. R. vancouverensis has been collected from De Mamiel Creek on southwestern Vancouver Island.

Pacific Northwest of North America: Oregon (Portland metropolitan area for R. similimanus) and British Columbia (southwestern Vancouver Island for R. vancouverensis).

• Salvelinema walkeri - intermediate hostLarvae of this nematode parasite of salmonid fish were recorded from R. vancouverensis; first record of intermediate host for this parasite
• Crepidostomum metoecus - intermediate hostMetacercariae of this trematode parasite of salmonid fish were recorded from R. vancouverensis

Females possess a marsupium (brood pouch) in which eggs are carried, similar to other amphipods.

Intermediate host for salmonid parasites. Serves as prey for amphibians and fish (observed in R. similimanus).

Subject of conservation research due to small, vulnerable populations. Environmental DNA methodology has been employed to study R. similimanus with minimal population impact.

• GammarusBoth are freshwater gammarid amphipods; Ramellogammarus can be distinguished by its Pacific Northwest endemism and taxonomic placement in Anisogammaridae rather than Gammaridae

• amphipod
• freshwater
• endemic
• Pacific Northwest
• intermediate host
• parasite vector

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Ramellogammarus vancouverensis Bousfield (Amphipoda) as an intermediate host for salmonid parasites in British Columbia