chromosomal fusion as the explanation for the "loss" of a chromosome pair, in humans.

https://www.johnhawks.net/p/when-did-human-chromosome-2-fuse

also , independent confirmation of observations, are gold for research, however needless repetition of effort is not.

thus when someone is prolific,or uncannily mad about a topic it tends to be dominated by that persons submissions, and often any other contributors are on that lead researchers team.