TLDR; Chatzimanolis is an insect systematist, and he is not a generalist. He specializes in a subtribe of rove beetles called Xanthopygina. In February 2012

TLDR; Chatzimanolis is an insect systematist, and he is not a generalist. He specializes in a subtribe of rove beetles called Xanthopygina. In February 2012 Chatzimanolis was working on a revision of the Trigonopselaphus genus—a relatively small group of neotropical rove beetles contained within the Xanthopygina subtribe. When taxonomists embark on the revision of a genus, they often discover new species. They find discrepancies: For the revision, Chatzimanolis requested all the unspecified Trigonopselaphus material from the Natural History Museum in London. The specimens arrived by mail in a small box. Inside the box were 24 pinned beetle specimens, all supposedly belonging to the Trigonopselaphus genus. Among them, misidentified, was the specimen Darwin collected at Bahía Blanca in 1832. Chatzimanolis was one of just a handful of people in the world—perhaps the only person—who could tell at a glance that the beetle was misplaced. “I was able to easily figure out that this was not Trigonopselaphus,” he says. “This is something new.” Then he realized it was a Darwin specimen.