Cyrtoidea or radiolaria protozoa skeletons:

Cyrtoidea or radiolaria protozoa skeletons: Artostrobiidae species 1, Clathrocanium reginae 2, Pterocorythidae species 3, Lipmanella bombus 4, Theoperidae species 5, Thyrsocyrtis species 6, Calocyclas monumentum 7, Pterocanium trilobum 8, Amphipyndacidae species 9, Nassellaria species 10, and Pterocanium elegans 11. Chromolithograph by Adolf Glitsch from an illustration by Ernst Haeckel from Art Forms in Nature, Kunstformen der Natur, Liepzig, Germany, 1904

Bombus Campanula Elegans Falco Forms Glitsch Haeckel Kunstformen Nassellaria Natur Protozoa Radiolaria Reginae Rhinoceros Spiralis

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