Description: Minute and semi-endophytic, only visible externally as sessile conceptacles.

Habitat: Semi-endophytic in Haliptilon and Jania in the lower and upper sublittoral.

Distribution: South-west Ireland and England from Cornwall and Dorset and the Channel Islands, but also recorded from Wales and Scotland. Europe: Mediterranean, Portugal, Atlantic coasts of Spain and France, generally widespread. Further afield: Canary Islands, Australia, California.

Distribution Map from NBN: Choreonema thuretii at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Choreonema thuretii at iNaturalist World Species Observations database.

WoRMS: Choreonema thuretii at World Register of Marine Species.