Notice the size difference between the P4s of the clouded leopard and the tiger (right beneath the clouded leopard). 

These things live in caves and often feed off of animal remains, making the already difficult-for-preservation limestone cave even harder for fossilization. However, we get a bunch of porcupine teeth as well. 

Just like other animals, these too primarily consist of singular teeth, therefore making it very hard to describe new species. The fact that porcupine teeth look completely different once worn doesn't help at all. Right now, almost all of the Hystrix species from this fauna are wastebucket taxons.

Species represented so far:

1. Cats – tiger, clouded leopard, Asian golden cat

2. Proboscideans – Stegodon and Asian elephant

3. Primates – macaques and orangutans

4. Reptiles – a Yangtze alligator and a turtle shell (not pictured; reptiles are extremely rare in this fauna)

5. Bears – sun bear, giant panda, Asian black bear

6. Chiroptera – even a bat mandible!

7. Ungulates – deer, rhinos, tapirs, pigs, etc.

8. Rodents – including extinct giant porcupines

9. Caniforms – red fox, dhole, binturong

Awesome mineralizations though.

Funny how all of them combined cannot outmatch the number of tiger (the apex predator here) teeth I have, just to show the strange amount of apex predators in this fauna.