GBIF has the genus for tapirs (Tapirus) twice:
Tapirus Brisson, 1762 http://www.gbif.org/species/7939585 with 5,075 occurrences
Tapirus BrÃ¼nnich, 1771 (note encoding issue) http://www.gbif.org/species/2440895 with 7,620 occurrences
These are the same name, but mammlogists have made a mess of things. Tapirus was published by Brisson in 1762 in a work that has been rejected because it wasn't binomial. Hence some people treated the subsequent use of Tapirus by Brünnich, 1771 as the first correct publication. This is why we have two names.
However the ICZN has ruled that some of Brisson's generic names are OK, see ICZN Opinion 1894 http://biostor.org/reference/5499, including the name Tapirus Brisson, 1762. Hence this is the name to use.
Not sure how come the number of occurrences for the two Tapirus names is different.