Loque'eque
The Loque'eque were a species from the Delphic Expanse in the Milky Way Galaxy. Despite being sentient, they were emotionally and physically primal and feral.

History 
Several centuries prior to 2153, they lost the ability to reproduce, and their species began to die out. In an attempt to save their race from total extinction, the Loque'eque engineered a mutagenic virus, which transformed the DNA of other species into their own.

The virus also contained genetic memory. Aliens who were infected with the virus communicated in the Loque'eque language and experienced hallucinations and an extremely powerful urge to seek the Loque'eque's home city, Urquat. The Loque'eque civilization was lost, but the virus was successful and, as of 2093, alien Commander Tret's people had lost tens of millions to the Loque'eque virus.

When an away team from  beamed down to the Loque'eque homeworld in 2153, three of the four officers were infected with the virus. Fortunately, Doctor Phlox was successful in synthesizing an antidote, returning Captain Jonathan Archer, Lieutenant Malcolm Reed and Ensign Hoshi Sato to their Human forms. Tret's people were still fighting the virus in 2153, using starships patrolling the system and away teams on the Loque'eque homeworld, literally incinerating any host of the virus. It was discovered that Urquat was in ruins, the species having been extinct for centuries.

Phlox shared his cure with Tret's people and Archer predicted that with it, the exterminators would successfully eliminate every trace of the virus. As a result, Archer ordered Phlox to save his virus samples in stasis so that something of Loque'eque would survive. ()

People
Unnamed
Unnamed Loque'eque

Background information
In the final draft script of "Extinction", the Loque'eque make-up was described as including bladders which could swell on either side of the neck.

The Loque'eque make-up involved contact lenses and a "full rubber head," in the words of Hoshi Sato actress Linda Park. ()

According to Reed actor Dominic Keating, it was challenging for himself, Archer actor Scott Bakula, and Linda Park to act as Loque'eque. "Me, Scott and Linda were in full prosthetic make-up. It's grueling, being in that stuff for 14 hours. I've got sensitive Irish skin," Keating said, with a laugh, "and the glue and the alcohol to release the glue just burns it off [....] It was an interesting acting challenge, to very quickly and succinctly come up with a physicality [and] speech patterns for this race. There were a lot of quick chats in the couple of days before [shooting], we started talking on set about what we thought we might do, but really, it came together the day that we had the make-up on and [...] shot the first scene [....] You just do it and you watch what the other person did and you go, 'I can incorporate that into what I'm doing' [....] It was tough being in the gear, but I really enjoyed it." Keating's performance was influenced by the portrayal which Linda Park, a dancer in reality, delivered for her own Loque'eque persona. "She was terrific to watch and to glean from," stated Keating, "in her physicality of the creature." ()

Linda Park herself described the Loque'eque as a "primitive, sort of super-strength alien lizard." She found wearing the make-up was painful. ()

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Delphic Expanse
Species