This is actually a point of contention between me and Moose, so I can assure you that it is wholly on purpose. I cannot recall his reasoning (nor mine against) but I have memory of the discussion.
Megalotragus had previously only appeared in Amdapor Keep (Hard) and based on their aldgoat model skeleton, the assumption of being some sort of voidsent possessed beastkin didn't seem unreasonable. With their use in Aquapolis I too had been pushing for their reclassification. However we have to be careful with Aquapolis though because....Also, the megalotragus is in voidsent as well - I'd have figured it to be beastkin, but maybe not? I'm a bit curious about them in general - in the Aquapolis they're always grouped with an auroch, so I'm assuming the floors are trying to match like-creatures with like-creatures....
There's some odd mixing in Aquapolis for sure... a dullahan arrives with polis magus, viking and centaur which are carbon copies of their Antitower brethren. Another wrinkle to the rather annoying anomaly of those animated armors.....although bilokos arrive with baby sasquatches, so maybe I'm entirely off base.
This sort of answers Morningstar1337's musings as well: the genus is rather model specific. Kuribu and Winged Lion are probably some form of golem, aye, most soulkin would be similar. Anantaboga and Valefor both use the same model, and based on the Summoned Dahak in the Weeping City of Mhach we know that their name is "Dahak." A Moraby Mole and a Snapping Shrew are both moles, non? The same is true here.Since I'm in the voidsent section, I presume entities like Anantaboga in Amdapor Keep NM are also dahak, along with the Valefors in Labyrinth of the Ancients?
Since Kuribu and Winged Lion are (so far) a unique golemization of statues, they remain unique in the bestiary due to the model difference. The only time different models are listed in the same Genus are when they're clearly stated to be the same creature in different life stages. Wamoura/campas, anzu and cockerels and pullets, etc. (And I mean, the way the bestiary is currently set up the young zu are listed are a different species than their mother, which is clearly probably not how real science works.)
DISCLAIMER: I AM NOT MOOSE. I just try to help him with this project and I know he's having a bit of technical issues lately so I'm trying to be useful!