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History of Ecological Sciences, Part 47: Ernst Haeckel's Ecology - Egerton - 2013 - The Bulletin of the Ecological Society of America - Wiley Online Library
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Die Radiolarien (Rhizopoda radiata) - Ernst Haeckel - Tafel 33 - Free Stock Illustrations | Creazilla
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Ernst Haeckel: Die Radiolarien (RHIZOPODA RADIARIA) Berlin, 1862 - PICRYL - Public Domain Media Search Engine Public Domain Search
![Hexadoras, Hexalonche, Hexacontium, Illustration of various radiolarians of the Spumellaria and Nassellaria groups from the 19th century, signed: E. Haeckel and A. Giltsch Del, F. Giltsch, Jena, Lithogr, Pl. 25, after p. 248, Hexadoras, Hexalonche, Hexacontium, Illustration of various radiolarians of the Spumellaria and Nassellaria groups from the 19th century, signed: E. Haeckel and A. Giltsch Del, F. Giltsch, Jena, Lithogr, Pl. 25, after p. 248,](https://c8.alamy.com/comp/2A2RN0R/hexadoras-hexalonche-hexacontium-illustration-of-various-radiolarians-of-the-spumellaria-and-nassellaria-groups-from-the-19th-century-signed-ehaeckel-and-a-giltsch-del-f-giltsch-jena-lithogr-pl-25-after-p-248-haeckel-ernst-del-giltsch-a-del-giltsch-f-lith-jena-lith-1862-ernst-haeckel-die-radiolarien-rhizopoda-radiaria-zweiter-theil-berlin-verlag-von-georg-reimer-1862-2A2RN0R.jpg)
Hexadoras, Hexalonche, Hexacontium, Illustration of various radiolarians of the Spumellaria and Nassellaria groups from the 19th century, signed: E. Haeckel and A. Giltsch Del, F. Giltsch, Jena, Lithogr, Pl. 25, after p. 248,
![Haeckel, Ernst; Haeckel, Ernst [Hrsg.]: Die Radiolarien (Rhizopoda radiaria) ; eine Monographie (Band 2): Grundriss einer allgemeinen Naturgeschichte der Radiolarien (Berlin, 1887) Haeckel, Ernst; Haeckel, Ernst [Hrsg.]: Die Radiolarien (Rhizopoda radiaria) ; eine Monographie (Band 2): Grundriss einer allgemeinen Naturgeschichte der Radiolarien (Berlin, 1887)](https://digi.ub.uni-heidelberg.de/diglitData/introimage/haeckel1887bd2.jpg)