Commons Public Domain Mark 1.0falsefalse English Ernst Haeckel Kunstformen der Natur Aspidonia Limulidae (Horseshoe Crab) Trilobite Eurypterid (Sea Scorpion)
tetragonophthalmus (Fischer, 1839), from above From the 47th plate from Ernst Haeckel's Kunstformen der Natur (1904). https://creativecommons.org/publicdomain/mark/1
tetragonophthalmus (Fischer, 1839), from above Euriptéridos. Montado de: Haeckel, E. H. P. A. (1914).Kunstformen der Natur. Bibliographisches Inst., Leipzig