William Thomas Calman CB FRSE FRS FLS (29 December 1871 – 29 September 1952) was a Scottish zoologist, specialising in the Crustacea.
He was born in Dundee, the son of Thomas Calman, a music teacher, and Agnes Beatts Maclean.
[4] When Thompson died, Calman, along with Douglas Young, wrote his obituary notice in the Royal Society of Edinburgh Yearbook.
In 1909, he wrote the Crustacea section in Lankester's Treatise on Zoology, where he introduced the superorders Eucarida, Peracarida and Hoplocarida as well as the concept of the caridoid facies, a hypothetical ancestral malacostracan.
Calman retired to Tayport in 1936, but returned to teaching during the Second World War at Queen's College, Dundee and St Andrews.