A teapot and set of teacups in the explorers' camp bears a sharp
resemblance to Mrs. Potts and her teacup children from Beauty
and the Beast (1991).
"Deep Canvas": The brand-new technique created by Disney for
use in Tarzan, which allows 2D hand-drawn characters to exist
seamlessly in a fully 3D environment.
Minnie Driver largely ad-libbed the breathless speech in which
Jane tells her father and Clayton about meeting Tarzan for the
first time.
When the gorillas pick up Professor Porter and turn him
upside-down, a beanbag toy of Little Brother from Disney's
Mulan (1998) falls out of his clothes.
In the original Burroughs novel, Tantor was an old bull elephant
disliked by the denizens of the jungle, Sabor was a lioness, and
Terkoz (presumably "Terk") was a male ape and Tarzan's archnemesis
within the troop.