"German zoologist" . . "1899Z"^^ . "1899-01-18Z"^^ . "Carl Friedrich Wilhelm Claus (2 January 1835 \u2013 18 January 1899) was a German zoologist. He was an opponent of the ideas of Ernst Haeckel."@en . "Carl Friedrich Wilhelm Claus"@en . . . . "1835Z"^^ . . . . . . . "1835-01-02Z"^^ . "Claus, Carl Friedrich Wilhelm"@en . .