| gammarus tigrinus | | USA: Maryland, Anne Arundel County, Rhode River, SERC Education Dock | | 1035661881 |
| gammarus tigrinus | | USA: Maryland, Anne Arundel County, Rhode River, SERC Education Dock | | 1035661897 |
| gammarus tigrinus | | USA: Maryland, Anne Arundel County, Rhode River, SERC Education Dock | | 1035661907 |
| gammarus tigrinus | | USA: Maryland, Anne Arundel County, Rhode River, SERC Education Dock | | 1035662327 |
| gammarus tigrinus | | usa: maryland, charles county, thoroughfare island, mattawoman creek, potomac river, chesapeake bay | | 1386665854 |