Requested reference
Keyserling, E. (1884a). Die Spinnen Amerikas II. Theridiidae. Bauer & Raspe, Nürnberg 1, 1-222. doi:10.5962/bhl.title.64832 
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Keyserling, E. (1884a). Die Spinnen Amerikas II. Theridiidae. Bauer & Raspe, Nürnberg 1, 1-222. doi:10.5962/bhl.title.64832 -- Show included taxa