Hate to bring it to you but hamadryas and goodfellow in the dictionary suggest otherwise
The Sifaka and Dik-dik don't have the expected person name to go with them is the thing.
Technically there's Crowned & Golden-crowned Sifakas, and Silver and Salt's Dik-diks, but they aren't species that are mentioned much or at all, with none even on the 2024 Metawishlist, though Crowned Sifaka got suggested once on the 2023 one (
Crowned Sifaka does pop up in a few threads & Silver Dik-dik got mentioned on the Small Mammal Meta-Wishlist)
As to the deleted terms situation, looking at DeLadysigner & Leaf's videos, they only mention the Hamadryas Baboon, Goodfellow's Tree Kangaroo and Secretary Bird, and the PZ version of the dictionary, so it seems like the traction on Reddit or here that'd be the reason for removing it (
it is a week since Leaf's video, and since the PC2 version was posted on reddit)
As to why it was removed, there's potentially reason to if it's real, but there's also reason to remove what's not coming, and get's people excited/angry. Goodfellow, Echidna, Howe and Impala are pretty specific to not remove.
I'd lean towards it being real, as taking the time to generate fake names doesn't seem like a very Frontier move (
although there was misdirection for the JWE2 Secret species pack with their twitter posts). Real doesn't mean that it's coming of course, just means it was considered, and probably isn't a complete list of terms they've made.
Barnacle and Mythology are on the PZ version now and weren't before, so I think it's safe to say the dictionaries are currently identical.