Wildshape: Improved Natural attack

[Yogibear41]

If you wild shape into an animal form that normally has improved natural attack, and you do not, you would deal less damage than a standard creature correct?

Example:

I wild shape into a dire tiger, which as written in the monster manual has improved natural attack claw and bite. I do no have the improved natural attack claw or bite. My claws and bites do not deal 2d4 and 2d6 base damage, but instead deal ? for claws and 1d8 for bite (not sure what the un-improved version of 2d4 is, I guess 1d6)

[Zanos]

You should do less, yeah. The dire tiger statline looks like a goof because there's no way to go to 2d4 on the INA chart.

[Yogibear41]

Normal Tiger is the same size, has improved natural attack and does 1d8, guess they just wanted to upgrade the 1d8 slightly.

[Falontani]

If the creature gets ina as a racial bonus Feat, I believe you should get it, but I could be wrong.