The Full Wiki

Deltan: Misc



Up to date as of February 02, 2010

Memory Beta, the wiki for licensed Star Trek content.

Planet of origin: Delta IV
Affiliation: Deltan Union, United Federation of Planets (admitted, 2259)
Warp capable: 2182
Classification: Mammalian humanoid
Environmental requirements: Class M conditions
Typical lifespan: Unknown
Sexes: Male and Female
Telepathic abilities: Healing capabilities
Blood Coloration: Red (iron based)
Distinctive Features:
Hairless scalp
Racial Sub-divisions:
Varied skin, and eye colouration

Emblem of the Deltans

The Deltans were a humanoid species which originated from the planet Delta IV in the Alpha Quadrant. The Deltan government was the Deltan Union and they were members of the United Federation of Planets. (ST reference: Star Trek: Star Charts)



Deltans largely resembled Humans with the exception of having no surface hair except for eyebrows, lashes, and (occasionally) a very thin layer of soft down along arms and legs. They are, on the average, slightly slimmer than Humans, and their cheekbones, eye shapes, and jawlines are slightly more symmetrical, Humans (and many other humanoid species) often find Deltans quite attractive. (ST roleplay module: Starfleet Operations Manual) Deltans were telepathic and empathic allowing them to sense other peoples emotions and administer medical aid by absorbing and minimising pain, this "Mind-meld anesthesia" meant Deltans made excellent medical personnel.

Deltans were perhaps best known for their high sexuality, both sexes emitted some of the most potent pheromones know to Federation science. As a result Deltans were something of natural aphrodisiacs, most intensely among their own race, but with a strong effect on most other humanoid species. Because of this Deltans swore an "oath of celibacy" when serving in Starfleet, they also developed chemical applications to diminish their pheromonal effect. To limit exposure to Deltan pheromones off-world visitors are not permitted to visit Delta IV itself, instead being restricted to the planet's moons Seyann and Cinera. (TOS movie: Star Trek: The Motion Picture; ST references: The Worlds of the Federation, Star Trek: Star Charts)

The Deltan oath of celibacy served not only to curtail sexual promiscuity with other races but also ensured the safety of non-Deltans; the long evolvement of the Deltan race not only heightened their sensuality but has also resulted in the sex act becoming a complete union in which both body and mind are shared. For Deltans this was natural and pleasant, but the experience of actually becoming part of another persons mind almost always incapacitates a human partner. It was sometimes said that a non-Deltan who entered into a physical relationship with a Deltan risked insanity. (TOS novelization: Star Trek: The Motion Picture)


In 2182 the Deltans made first contact with the Andorians, the Deltan sage Niro guided the planet through its tumultuous decades from first contact to Federation membership, developed the Oath of Celibacy and writing much of Deltans' modernized legal code. (ST roleplay module: Starfleet Operations Manual)

The Enterprise episode "Bound" establishes Human contact with the Deltans as early as 2141. Star Trek: Star Charts claim the Deltans became warp capable in 2223 and joined the Federation in the same year.
Emblem of the Deltans (c. 2290)

Following the Deltans becoming full members of the Federation in 2259 Starfleet teams were assigned to Delta IV. The Deltan Ilia worked closely with these teams and formed a strong attachment to the Human Willard Decker. The two later served together briefly on the USS Enterprise before both were reported "missing in action" after the Enterprise encountered the V'Ger probe in 2273. (TOS novelization: Star Trek: The Motion Picture)

The Project Genesis research team assigned to Space Station Regula I was made up of two Deltans: Jedda Adzhin-Dall and his mate, Zinaida in 2284. (TOS novelization: Star Trek II: The Wrath of Khan)

An unnamed Deltan woman was a member of the USS Excelsior's bridge crew in 2285. (TOS movie: Star Trek III: The Search for Spock)

The Carreon fought a war with the Deltans at some point prior to the 2370s. (TNG novel: A Time for War, A Time for Peace)

In 2370 a pair of Deltan females visited Deep Space 9. Whilst enjoying drinks in Quark's they attracted the attention of a dozen or more Argelian men. (DS9 novel: Devil in the Sky)

In 2374, Ensign Clarze was the Deltan who served as the conn officer aboard Enterprise-E. (TNG novels: Q-Space, Q-Strike, Q-Zone)

Gaila had a Deltan female working for him in 2372. She dealt with Quark when he called Gaila to ask for help. (DS9 novel: The 34th Rule)

In late 2379, the Deltans petitioned to the newly elected Federation President Nan Bacco for aid in repairing their ailing water reclamation system. They liked the design of the system on Gault; however, the system had been designed by the Carreon, who did not wish the Deltans to use it. (TNG novel: A Time for War, A Time for Peace)


Delta IV's unpredictable tides and otherwise inhospitable ecology have promoted a culture at once polyglot and unified. Although many microcultures evolved throughout the expansive planetary chain of island archipelagos, they could never remain isolated long enough to develop either xenophobia or devastating cultural and technological advantages over one another. To forestal inbreeding, the island-bound Deltans also cultivated an extremely open sexual culture. Indeed, stranded mariners were often adopted into large group amours in order to refresh local gene pools. Brought together by ties of sex and geography, Deltans learned to peacefully coexist and relate well, by necessity. With the bountiful renewable resources of so flourishing a natural environment, and a low species birthrate, wars over resources were almost unknown among the Deltans. (ST roleplay module: Starfleet Operations Manual)

The Deltans were also drawn to cultural unity by their genetic predisposition toward empathy along with related psionic abilities. The capacity to experience another's suffering rendered violence and armed conflict anathema, and even excessively hurtful personality conflict and quarrel, unthinkably impolite. Yet ordinary social hypocrisy was impossible due to the intense Deltan pheromones and acute sensitivity thereto, rendering Deltans so transparent to one another, emotionally. And so, their culture evolved toward a remarkable global ideal of supportive, nurturing behavior founded upon time-honored Deltan sexual openness. A deeprooted sense of species and personal security remains unshaken by their subsequent contact with the Andorians and later other starfaring cultures of the Beta Quadrant. Their greatest concession to existence in a dangerous galaxy was the adoption of the renowned Oath of Celibacy out of necessity and good manners when dealing with those whom they came to regard, perhaps with somewhat patronizing deference, as less sexually-mature species and cultures. (ST roleplay module: Starfleet Operations Manual)



This article uses material from the "Deltan" article on the Memory-beta wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.

ST Expanded

Up to date as of February 07, 2010

The Star Trek Expanded Universe Database is for fanon and related content. See for the canon Star Trek wiki.

The Deltans were a native humanoid species to the planet Delta IV and United Federation of Planets members.


Members of the Deltan race, both male and female, were bald and had the ability to ease pain in others through touch.

They were also a very sexually active species, with their pheromones and sub-conscious telepathy enhancing their appearance to non-Deltans. Because of this, Deltans serving in Starfleet and other positions dealing with other species took an oath of celibacy. (Star Trek: The Motion Picture)


The Deltans used Deltan musk fungus as a food. In at least the 2260s, Deltan musk fungus was served aboard Starfleet ships with unexpected side-effects. (TOSS #4: "Mess", #7: "Musk Fungus")


The ECS Horizon met some Deltans in 2141. Travis Mayweather later expressed, while they were very attractive and honest, the Deltans affected him, and he combated this by excessively working out in the gymnasium. (ENT: "Bound")

USS Enterprise navigator Ilia was a Deltan, who made contact with the V'Ger entity in 2272. She was officially listed as missing in action after the event. (Star Trek: The Motion Picture)

Deltan Starfleet specialist Aabin served aboard the USS Grissom until he and his crewmates were killed by a Klingon Bird-of-Prey in orbit of the Genesis Planet in 2385. (Star Trek: Grissom)

A female Deltan served aboard the USS Excelsior in 2285, while a year later, a male Deltan was an ambassador serving on the Federation Council. (Star Trek III: The Search for Spock; Star Trek IV: The Voyage Home)

Anara Rysyl was a Deltan Starfleet officer serving as the operations manager aboard the USS Sutherland from 2371 until 2376. She felt the Deltan oath of celibacy was archaic and discriminatory. (Star Trek: Sutherland)

Dariel was a Deltan Starfleet counselor serving aboard the USS Paragon in the 2370s. (Star Trek: Paragon)

In 2372, a Deltan crew and Paragon officer Kate Howard died aboard a Deltan ship after the Romulans planted a "crystalizing" virus aboard. Fellow Paragon officer Timothy Garrick was the only survivor. (Star Trek: Paragon: "The Captain's Day Off")

Deltan Starfleet linguist Malia served aboard the USS Daedalus and USS Daedalus from 2377 onward into the 2380s. (Star Trek: Daedalus)

Ceci Ilia was a Deltan-human hybrid and civilian running Miss Ceci's club aboard the USS Independence from 2382 until at least 2386. (Starship Independence)

In 2383, a Deltan science team conducted astrological experiments aboard the Independence that nearly ended in disaster. (Starship Independence: "Marvelous")

Starfleet nurse Kalia Parsala was serving as head nurse aboard the USS al-Qazwini by 2385. (Star Trek: USS al-Qazwini)

This article uses material from the "Deltan" article on the ST Expanded wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.


Got something to say? Make a comment.
Your name
Your email address