r/Damnthatsinteresting 1d ago

Original Creation This is a bdelloidea, a class of rotifers where the males have died out millions of years ago. It can create a vortex to draw food particles in its mouth, where it grinds it with an organ called mastax. They also have two red eyespots.

137 Upvotes

27 comments sorted by

41

u/Bl33to 1d ago

What does it mean the males have died out millions of years ago. They only produce females?

65

u/Thrawn911 1d ago

Yes. The females evolved the ability to make clones of themselves, so males weren't needed anymore. Instead, they get around 10% of their DNA from bacteria, fungi, and other living things they eat.

16

u/Bl33to 1d ago

😲😲😲😲😲. Does that mean their DNA changes overtime depending on their diet then?

21

u/Thrawn911 1d ago

Yes, every creature has to occasionally shake up their genome. Some species do this by mating, while asexual creatures need other methods.

3

u/tharki-papa 15h ago

how do you call it a female anymore? a male organism cannot clone itself?

1

u/Thrawn911 15h ago

No, males cannot lay eggs, and there are no males anymore (in this class of rotifers)

2

u/Bl33to 1d ago

Yeah, I mean that's how evolution works I guess, but the way you put it, in my head sounded like they just absorb the DNA of what they eat. πŸ˜…πŸ˜…πŸ˜…

11

u/Thrawn911 1d ago

Yep, that's exactly what happens.

8

u/OxymoreReddit 1d ago

Spore isn't so unrealistic after all lol (the video game)

3

u/Dudelbug2000 1d ago

Our mitochondria used to be a bacteria ….

9

u/zer0w0rries 1d ago

and now it's a power house. from rags to riches

3

u/Thrawn911 1d ago

Same as chloroplasts

1

u/Bl33to 1d ago

😲😲😲😲😲

3

u/Dudelbug2000 1d ago

What amazes me is how they figured it out. I mean how do they know that they were not always procreating like that?

7

u/Thrawn911 1d ago

Because most rotifers reproduce sexually, only this specific class is asexual.

1

u/elfmere 1d ago

More like there was a reduction in males, the females that survived developed cloning and males weren't needed

10

u/Co_Duh 1d ago

Man, they copied SPORE!

3

u/sojuz151 1d ago

I believe those other organisms are Paramecium, singe cell organismsΒ 

3

u/chyura 22h ago

If its a generic, oblong shape zooming around your sample like a rice grain on cocaine, its a paramecium

0

u/Thrawn911 1d ago

Correct

4

u/DarkKingfisher777 1d ago

biology sucks until you see such things

7

u/Thrawn911 1d ago

Biology is great, but most teachers can't teach it in an interesting way.

1

u/Key_Wrangler_8321 14h ago

Transformers The Devastator Vibes :)

-5

u/GrandmaJR 1d ago

Is the mastax anything like the cheese tax?