26. Halosphaeriopsis mediosetigera (Cribb et J.W. Cribb) T.W. Johnson, J. Elisha Mitchell scient. Soc. 74: 44 (1958)

Substrate and distribution: Ceramium, Furcellaria, and marine wood. Bohuslän, Öland, Skåne, Södermanland, Uppland. Additional record: Bohuslän, Mollösund par., Mollösund, Kattevik, 58°04′32″N, 11°28′08″E, on driftwood, 6.VI 2018 ST 18-26, 18-82 a (UPS). New to Uppland .

Notes: Reported by Erneholm (1972) as Culcitalna achraspora Meyers et R.T. Moore from Bohuslän, and Henningsson (1974) under the same name from Öland and Skåne. Henningsson (1974) also reported it as Halosphaeria mediosetigera Cribb et J.W. Cribb. Trichocladium achrasporum (Meyers et R.T. Moore) M. Dixon was linked to H. mediosetigera, its sexual morph, by Shearer and Crane (1977) and has thus been reduced to a synonym of H. mediosetigera .