Image: Bacteriaphage, acts like the plagiarus praepotens because of the way it takes the DNA from the host to reproduce.
Chemical A0-3959X.91 – 15, Plagiarus Praepotens
Plagiarus= thief, in Latin | Praepotens= prae- + potēns = before mighty, in latin
Plagiarus = from Latin plagiarius “kidnapper, seducer, plunderer, one who kidnaps the child or slave of another,” since the liquid takes on the DNA of the host and rewrites it into its final form of the alien. | Praepotens =praepotēns meaning the unusual ability of an individual, or strain to transmit its characters to offspring because of homozygosity for numerous dominant genes. prae- meaning “before,” from Latin prae + potens “powerful,” from potis “might, power, rule, dominion,”
Minor spoilers for Alien: The Cold Forge in this video by AVP Galaxy
The recombinant superweapon, “Plagiarius praepotens”
Greek for “spring old quality,” Crenarchaeota  (Figure 1) was also known as Crenarchaea or oocytes are archaea that have been classified as a phylum of the Archaea domain. Until recently, all cultured Crenarchaea had been thermophilic or hyperthermophilic organisms, some of which have the ability to grow at up to 113 °Celcius. These organisms stain Gram-negative and are morphologically diverse having a rod, cocci, filamentous and oddly shaped cells. 
Themoprotei can be found around ocean vents, with temperatures reaching up to 400 degrees Celsius, rich with high concentrations of dissolved minerals, but low concentrations of oxygen, if they are not completely anaerobic, they could also be low in pH. Archaea can flourish at different temperatures, but the most striking example of hyperthermophiles are the archaea in the genera Pyrodictium, (Figure 2) which have adapted to live temperatures ranging from 100-110 degrees Celsius, at the ocean floor around thermal vents.
Acidophiles are also common in this class, particularly the order Sulfolobales: Sulfolobus solfatericus flourishing at a pH ranging between 2 to 4. The acidophiles prefer environments rich in sulfur, obtaining their energy using H2, H2S, and elemental sulfur as electron donors.
Figure 1: Image By Xiangyux – English Wikipedia, Public Domain
Phylum Crenarcheota See above
Figure 2: Scanning electron micrograph of Pyrodictium archaea. By R. Rachel, 1997 http://tolweb.org/Crenarchaeota
Order Sulfolobales Resistant to ph shifts
Similar to Metallosphaera, can eat/change metal.
Plagiarius “Thief, plagiarist”
(Specific epithet) Praepotens “Mighty”
- C.Michael Hogan. 2010. Archaea. eds. E.Monosson & C.Cleveland, Encyclopedia of Earth. National Council for Science and the Environment, Washington DC.
- Blochl E, Rachel R, Burggraf S, Hafenbradl D, Jannasch HW, Stetter KO (1997). “Pyrolobus fumarii, gen. and sp. nov., represents a novel group of archaea, extending the upper-temperature limit for life to 113 °C”. Extremophiles. 1 (1): 14–21.doi:10.1007/s007920050010. PMID 9680332.
- Garrity GM, Boone DR (editors) (2001). Bergey’s Manual of Systematic Bacteriology Volume 1: The Archaea and the Deeply Branching and Phototrophic Bacteria (2nd ed.). Springer. ISBN 0-387-98771-1.
- SYSTEMATIC AND APPLIED MICROBIOLOGY I. Abt. Originale C, Mikrobiologie und Hygiene, formerly Zentralblatt für Bakteriologie,