I'm still unclear on xenomorph castes besides standard and queens. As far as I thought I understood it, there were normal xenos, as seen in the first movie and queens, with the difference being that queens were bigger, had a more crownlike ornate head and extra pair of arms and laid eggs, standard xenos would metamorphosize into queens if there wasn't already a queen present and if two queens met or metamorphosed at the same time, they'd fight to the death and queens automatically asexually self-impregnated. Where's everyone getting everything else from?
Okay so the adult castes from the four movies in order of appearance.
-Drone ('fresh' young alien)
-Warrior (older drone which sheds it's dome covering and is more aggressive/stronger)
-Queen (Reproductive caste, big eggsack, crest, the works)
-Runner/"The Dragon" (born from a dog or ox, fast, overly aggressive, nasty, no back-tubes)
-Cloned Queen (The same puppet mold as the Aliens Queen, mostly the same except she grows a womb)
-Cloned Drones (digitigrade, spits acid, looks meaty and not bio mechanical)
-"Newborn" alien (big fucking weird thing that gets sucked into space)
Common aliens in further media are as follows
-Praetorian (further stage of drone/warrior life, looks similar to Queen, very tough and often serves as 'royal guards' for the queen)
-Crusher (Praetorian version of the Runner)
More types show up but usually they're one-offs
The exact process of 'how does queen get made?' is kind of vague to this very day, but the main ways that pop up are as follows.
1: Royal/Queen facehugger implants person with queen embryo
2: Alien molts into Praetorian, which then turns into Queen
We never actually see more than one Queen in the larger medias of Aliens, but over three are found in Aliens Dark Descent. So they CAN get along just fine, if they have a bit of space.
Queens do not need to be impregnated apparently, for a race of sex-monster rapists the Xenos don't actually have any junk.