Contortrix class

The Contortrix-class was a Xindi-Reptilian vessel in service since at least the 22nd century. During the 2150s the Contortrix-class served as warships. When the class was made available to Federation Starfleet and the Klingon Empire and the Romulan Republic respectively, it was reclassified an escort. 

Technical data
Ships of the Contortrix-class were nimble and designed for hit-and-run attacks. Starships of this class had a crew complement of 22 in the 22nd century and 50 in the 25th century. It was designed to equip dual cannons and had a total of 5 forward and 2 rear weapon ports. Its special feature was a console to launch a Xindi weapon platform.

Contortrix-class starships became available for purchase from the Lobi Consortium in 2410 following a deal made with the Xindi Council. These escorts were available to Federation Starfleet, the Klingon Defense Force and the Romulan Republican Force. Only officers ranked rear admiral, lower half, brigadier general or subadmiral were allowed to command these ships.

In the early 25th century, the bridge crew included a commanding officer, two tactical officers (ranked commander and ensign, respectively), one engineer of lieutenant commander rank, one lieutenant science officer and one lieutenant of any department. 

History
In the late 2150s, during the Romulan War, the SS Enterprise met two Contortrix-class warships.