The only spider species he described (as Fuesslin, 1775) is the daddy long-legs spider, Pholcus phalangioides, also known as cellar spider.
This is the only spider species described by the Swiss entomologist Johann Kaspar Füssli who first recorded it for science in 1775.
Johann Sebastian Bach | Johann Wolfgang von Goethe | Johann Strauss II | St. Johann in Tirol | Johann Heinrich Pestalozzi | Johann Albert Fabricius | Johann Christian Bach | Johann Georg Wagler | Johann Pachelbel | Johann Nepomuk Hummel | Johann Gottfried Herder | Johann Nestroy | Johann Joachim Winckelmann | Johann Gottlieb Fichte | Johann Bernhard Fischer von Erlach | Johann Homann | Johann Friedrich Böttger | Johann Kuhnau | Johann Heinrich Lambert | Johann Friedrich Blumenbach | Johann Wilhelm von Müller | Johann Wilhelm, Elector Palatine | Johann Mattheson | Johann Jakob Engel | Johann Gustav Droysen | Johann Gottfried Schadow | Johann Georg Faust | Johann Friedrich Julius Schmidt | Johann Christoph Adelung | Johann Baptist von Spix |
Johann Kaspar Füssli (9 March 1743 in Zurich – 4 May 1786 in Winterthur), painter and entomologist