This was the Cambridge University expedition to the rainforest reserve near Bartica in what was then British Guiana, South America.
It is bigger than most micronycteris bats with a fierce disposition.
A small frog was found in the stomach of a specimen, and the bat is strong-willed enough to chew its way out of a cloth bag.
The species is found across the tropical regions of Central America and South America; including Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guyana, Honduras, Panama, Peru, Suriname, Trinidad and Tobago, and Venezuela.
[1] It is recorded (2021) in the Eponym Dictionary, published by Johns Hopkins University of Baltimore USA.