Maria Johanna Dahl, née Grosset (26 July 1872, in Boromlya, Poltava Region – 6 January 1972) was a Ukrainian-born German zoologist, arachnologist, and carcinologist. Along with her husband, Friedrich Dahl, she was a co-author and editor of the zoological series ''Die Tierwelt Deutschlands'', published between 1925 and 1968.
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