File:Haeckel Phaeodaria 1.jpg

Summary
Radiolarians (also radiolaria) are amoeboid protozoa that produce intricate mineral skeletons. 1. Circogonia icosahedra (Haeckel) = Circogonia icosahedra Haeckel, 1887 (1a: opening of shell) - Circogonia icosahedra, a species of Radiolaria, shaped like a regular icosahedron. 2. Circostephanus coronarius (Haeckel) = Circostephanus coronarius Haeckel, 1887 3. Haeckeliana porcellana (John Murray) = Haeckeliana porcellana Murray, 1885 (3a: pore circle without spines) 4. Cortinetta tripodiscus (Haeckel) = Cortinetta tripodiscus 5. Medusetta tetranema (Haeckel) = Medusetta tetranema Haeckel, 1887 6. Challengeria murrayi (Haeckel) = Protocystis murrayi (Haeckel, 1887) Kunstformen der Natur (1904), plate 1: Phaeodaria Kunstformen der Natur (1904), plate 1: Phaeodaria (see here, here and here) Artist / Author:Ernst Haeckel (1834–1919) - public domain due to age