Here is a list of the Texas cavalry units at Pea Ridge that were then dismounted at Des Arc for their transfer with Van Dorn to Corinth.
Also, there are two others not at Pea Ridge that were sent with Van Dorn as dismounted units

McIntosh Cav Bgde
3rd Tx Cav
6th Tx Cav
9th Tx Cav
11th Tx Cav
1st Tx Cav Bn [later 32nd Tx]
1st Ark Cav Bn

Hebert’s Inf Bgde
4th Tx Cav Bn [later 27th Tx]

Not at Pea Ridge
10th Tx cav
14th Tx cav

Intended for Van Dorn but kept in Arkansas due to Union invasion threat. Also became dismounted units.
15th Tx cav
16th Tx cav
17th Tx cav

The leading squadron of Parsons' 12th Tx Cav was actually shipped to Memphis with their horses, as Parsons went to Corinth to get permission from Beauregard to keep his regiment mounted. Parsons and his leading squadron were shipped back to Arkansas and remain mounted throughout the remainder of the war