Robert Friedrich Wilhelm Mertens was a German herpetologist. Several taxa of reptiles are named after him. He postulated Mertensian mimicry.
Mertens was born in Saint Petersburg, Russia. He moved to Germany in 1912, where he earned a doctorate in... Wikipedia
Born: December 1, 1894, Saint Petersburg, Russia
Died: August 23, 1975 (age 80 years), Frankfurt, Germany