Taming these things are confusing, but I believe I have figured out how they work.

Step 1 is to kill a wild rhynio (can be any gendrr) to get the pheromones, next it is best to make a trap, the best design i know of is basically a stone dino gate griffin trap, but with behemoth gates. Next you want to find a high level wild female rhynio. Think of the level of the rhynio as the taming effectiveness you will recieve 150 being max. Next you need to lower the rhynio to below 10% hp, you can net them to make this easier. Once it is below 10% hp you need a mount with a high drag weight in order to inherit the best stats, carch/giga have best chances. Feed the creature the phermone and mount it. The rhynio should impregnate it within a few seconds. DO NOT CRYOPOD THE DINO IT IMPREGNATED! YOU WILL LOOSE THE BABY! once your tame is impregregnated it will go through a gestation period and ask for cravings. It is important you furfill as many as possible as they have a major effect on the level the offspring will be and the stats inherited. Once the timer is complete your dino will fall unconscious and die, however you will now have a new perfect tame rhynio!

The Paraceratheriums can eat the pheromones too which is extremely helpful because they are easy to tame, practically useless AND they live in the same area as the Rhyniognatha!

“Wahoo! My genius plan to kill a male worked! Now I just have to search my 25 carnivores for the pheromone… AAAAAAAAAAAAAARRRGGGHHHH!!!!!!!!!!!!!”

Trap the rhyniognatha after it impregnates your Dino that way you can reuse it later for more rhyniognatha taming

When "taming" the health of your dino will drop rapidly, it scared me ans my mates half to death, its meant to, when the health of the dino reaches 0 itll drop to the floor unconscious for a split second before dying and being consumed. No amount of healing will save the dino. The dino wont die before the timer finishes unless its being attacked by an outside source. Goodluck everyone

To the guy that said if the cravings are needed or if they improve the rhynio level: Cravings heavily depend their level, you could have two extremely high level parents (check other tips for taking these suckers if your confused on the term “parents”) but only get a level 30-40 rhynio. Hope this helps!

PAY ATTENTION PLEASE!!!

GET A DINO WITH ENOUGH HEALTH TO IMPREGNATE!!!

From all the info I got, this bug is real annoying to tame but I still believe I can do it

My Technique :

I got the Pheromone from the Male

I tranqed the female ( it sleeps a lot )

Tamed a bronto

Made sure it got food but it didn’t have enough health (2.5k)

Then Rhynio woke up, I fed the bronto the pheromone

The TRICK you don’t see is the Rhynio has to TAIL ATTACK 10-12 times before it impregnates, it doesn’t just hit once and leave and that drains your Dino’s health

So moral lesson, get a healthy host

Getting a high level one of these is probably the most grind intensive tame in the game. I spent a couple weeks at least getting things together to satisfy all the possible cravings and find a 150 female. I can personally say, after all that work, I'd do it again. THEY ARE WORTH IT! I can't stress enough how freaking awesome these things are. Go look at the wiki page, and your jaw will drop when you see the stuff it can do. Puts every tame I've ever had in this game to shame and its not even close.

Unfortunately, to the guy who asked if the pheromone can spoil… Yes, it does spoil. It takes a whole day thankfully. Just make sure you’re prepared to take on two rhyniognatha in a day and you should be fine. 👍

The easiest Dino to use if you just want to tame a rhyniognatha NOT FOR AMAZING STATS OR ANYTHING, is a spino because they have way to high hp and the damage is low enough that you can easily lower the ho of the mother without having to worry about killing them

I don't know if it was a bug or if it's part of the pregnancy, but my baby got VERY hungry and ate hundreds of berries.

CLARIFICATION: What tame you use as the host DOES matter significantly. It is just like any other parent when breeding. Rhynio and your host will roll the stat game for what you get. You want your weight high? Get a good bronto. Damage? Say goodbye to a good giga. And make sure you have an ungodly amount of food.Or pick a host that is capable of harvesting that ungodly amount of food close to home in between cravings

Rhynio eat:

●Absorbent Substrate

●Achatina Paste

●Ammonite Bile

●Golden Hesperornis Egg

●Carcharodontosaurus Egg

●Giganotosaurus Egg

●Quetzal Egg

●Element

●Gasoline

●Giant Bee Honey

●Superior,Exceptional,Extraordinary Kibble

●Battle Tartare

●Calien Soup

●Enduro Stew

●Focal Chili

●Lazarus Chowder

●Shadow Steak Saute

●Sweet Veggie Cake

●Woolly Rhino Horn

This creature is so overpowered it shoots resin that make creatures slow down its fast it moves under water fast and it can carry lots of supplies.This creature can also stick on to trees when the cross hair turns green and you click space.This giant bug can also let you hold your weapons while on it meaning you can tranq things from above over all just a broken creature but brutal when encountering.

High level Brontos worked best for us.

Recent patch makes it impossible to tame inside a trap. Need to release it from trap before it will impregnate your dino. I wasted a bunch of pheromones for science

Rhyniognatha not follow problem

Tek creatures won't work as hosts. They won't eat the pheromone.

Get a brontosaurus go to the swamp spam attack to get rare flowers make brontosaurus eat rare flowers to lure rhyinios kill 1 hope it’s a male ko 1 and almost kill it hope it’s a female and it impregnated your brontosaurus ps you don’t have to worry about the craving because it’s just for better rhyinios you don’t have to give the Dino the craving

pps you can use a diplo or trick but I recommend a diplo if you don’t want to tame a brontosaurus cause there health will level by the hundreds and the trick doesn’t do that and rhyinios are dangerous soooooooooooooo

In the early game, you can use like a trike to get a lvl 1 rhynio, and it will actually carry you through most of the game.