@Willem Thank you for the suggestion. Perhaps adding oids to the suffix of a word is a good choice

@7luangamerminecraft Your suggestion is great. Thank you very much for liking my mod and providing an essay

Flameo hotman!

Since I mentioned an origin, this origin could make you start in a special world, a "tectonic world", a highly unstable planet with a very active surface, teeming with lava, volcanos and earthquakes, inhospitable for all others, but not for the beings that wore forged by it, this planet would have a natural production of exotic gases to feed it's fiery citizens and a buff for alloys

I have a suggestion
The lithoids and hive minded species have a special trait when you choose them, which makes the gameplay with them a little different and more unique, you could do a trait for these species too, it could for example make them eat exotic gases instead of food, it would be their "fuel" just like food is for us, since it's kinda strange that beings made of fire eat food, but I think would make a lot of sense if they needed gases, it would probably be necessary to start with the technology maybe with some origin made for them.
this trait could also make them morre habitable in desert, arid and savanna planets, and less habitable in wet climates, and for some balance they could have a little buff in alloy production, since they are made of fire

"Pyrids" could also work, i think

Well if you want to go with the general stellaris species DLC naming convention (Aquatics being the one exception) (Plantoids, Humanoids, Necroids, Lithoids, Toxoids), I'd say Infernoids would be a decent name.

Volcanoids, maybe?

отличные виды, спасибо!

"Hyperthermophile" would be the more scientific term for it. "Thermotroph" doesn't sound bad either, though that's not a real word. Check out the wikipedia page on "extremophiles", that's the umbrella term for species that live in extreme environments.

I don't know what vocabulary to use to describe these species. They are close to flames but not flames, and I find it difficult to find a suitable word in English. High temperature? Hot? Heat resident? Thermobiology?I'm sorry, my English proficiency is limited and I can't make a perfect translation