Per Theodor Cleve: a short résumé and his radiolarian results from the Swedish Expedition to Spitsbergen in 1898

Cleve’s material from the Swedish Expedition to Spitsbergen in 1898 has been re-examined and lectotypes and some paralectotypes have been established for three spumellarian species, eight nassellarian species, and three phaeodarian species. In addition, important species in the Cleve collection, including three spumellarian species, 10 nassellarian species and three phaeodarian species have been illustrated and commented on. Some of Cleve’s identifications were erroneous, and we have carefully discussed these in our re-evaluation of Cleve’s species concepts.