Karl Eggerth junior (1861-1888) was an Austrian botanist and medical student who specialised in collecting lichen specimens.
Josef had donated a specimen of Deinotherium giganteum to the Imperial-Royal Geological Institution of Vienna, which had been unearthed during excavations for the Esterházybad in 1857.
[1][3] He was friends with Richard Wettstein, and together they founded the student-led Natural Science Association at the University of Vienna in 1882.
[5] After heart disease causing a "brief, painful illness" Karl junior died on March 30, 1888, and was interred at the Vienna Central Cemetery in the family grave.
[1][5] Eggerth cultivated relationships with many lichenologists of his time, which included his acquisition of a large part of August von Krempelhuber's Europäischen Flechten (European Lichens).