Where has the Monoporeia affinis been recorded?

Monoporeia affinis occurrence evidence comes from 649 records in 8 countries and territories, from 1865 to 2025. Most records come from Sweden.

• 649 records
• 8 places
• 56 years recorded
• Malacostraca class

Observation evidence passport

Compare this animal’s observation pattern

When it is recorded

Peak month: June. Records cluster in the months an animal is present and being looked for, so a summer peak can reflect observer effort as much as the animal.

Records over time

Recording effort has risen steeply almost everywhere since the 1990s, so a rising line usually shows more observers rather than more animals.

Where Monoporeia affinis has been recorded

The countries below show where occurrence evidence exists for Monoporeia affinis. They do not define a complete habitat range: survey effort differs by place, and historical or one-off records can appear alongside repeated presence.