01-29-2015, 12:38 AM
The sea squirts are chordates immobile
who, when old, don't look like they're chordates!
Their class name is sadly iambic.
The next class, the cephalochordates,
have heads that are all underdeveloped
and notochords ever-existing.
The fishes who're part of Agnatha
are fishes that witches find lovely
because they are jawless and slimy!
But Agnatha's not monophyletic:
there's one group, and then there's Myxini
(the former are vertebrate cuties!)
Now fishes, real fishes, they're bony
or cartilage-skeletoned creatures:
they're all cool, so you just stay with us!
Now, sharks, rays, and skates are not bony,
and they're all much older than humans!
They also have skin like sandpaper.
Next up, you've got fishes with ray-fins
(that's fins with them lepidotrichia).
One species is yummy Tilapia!
And then there's the Sarcopterygians:
the Coelacanths and the mudfishes!
Their fins are from where limbs succeeded!
"Anura", "Caudata", "Apoda":
the only ones left of Amphibia!
They're cool but they're creepy and slimy.
Anurans are frogs, toads, and tadpoles,
though tadpoles are just froggy babies.
Caudatans are all salamanders.
Apodans, meanwhile, are Caecillians:
they look like worms but they're amphibians!
And that's it, I think, for amphibians.
The reptiles called Rhyncocephalians
are Lepidosaurians in subclass!
They've snouts that are shaped like a bird's beak.
The reptiles whose abdomens live in
thick shells made of bone and not chitin
belong to the order Chelonia.
The reptiles whose scales are all squamate
(which means they are shaped like odd rhombi)
belong to the order Squamata!
The snakes and the geckos are squamates,
as squamates are Lepidosaurians!
And crocs are all just Crocodilians.
Remember, though, group Crocodilia's
an order, and not its own subclass!
It's subclass, it is Archosauria.
Next come all the birds and the mammals:
of birds, there is only one subclass,
the subclass that's called Neornithes!
And mammals, well, this group's much larger,
with two subclasses which are still extant,
and many more orders and whatnot!
I'll skim over all of their orders,
so that this'll quickly be over.
There's Theria and then Yinotheria.
The Therians, they give birth to babies
that come out of their moms all shell-less,
while the other subclass still lays eggs.
who, when old, don't look like they're chordates!
Their class name is sadly iambic.
The next class, the cephalochordates,
have heads that are all underdeveloped
and notochords ever-existing.
The fishes who're part of Agnatha
are fishes that witches find lovely
because they are jawless and slimy!
But Agnatha's not monophyletic:
there's one group, and then there's Myxini
(the former are vertebrate cuties!)
Now fishes, real fishes, they're bony
or cartilage-skeletoned creatures:
they're all cool, so you just stay with us!
Now, sharks, rays, and skates are not bony,
and they're all much older than humans!
They also have skin like sandpaper.
Next up, you've got fishes with ray-fins
(that's fins with them lepidotrichia).
One species is yummy Tilapia!
And then there's the Sarcopterygians:
the Coelacanths and the mudfishes!
Their fins are from where limbs succeeded!
"Anura", "Caudata", "Apoda":
the only ones left of Amphibia!
They're cool but they're creepy and slimy.
Anurans are frogs, toads, and tadpoles,
though tadpoles are just froggy babies.
Caudatans are all salamanders.
Apodans, meanwhile, are Caecillians:
they look like worms but they're amphibians!
And that's it, I think, for amphibians.
The reptiles called Rhyncocephalians
are Lepidosaurians in subclass!
They've snouts that are shaped like a bird's beak.
The reptiles whose abdomens live in
thick shells made of bone and not chitin
belong to the order Chelonia.
The reptiles whose scales are all squamate
(which means they are shaped like odd rhombi)
belong to the order Squamata!
The snakes and the geckos are squamates,
as squamates are Lepidosaurians!
And crocs are all just Crocodilians.
Remember, though, group Crocodilia's
an order, and not its own subclass!
It's subclass, it is Archosauria.
Next come all the birds and the mammals:
of birds, there is only one subclass,
the subclass that's called Neornithes!
And mammals, well, this group's much larger,
with two subclasses which are still extant,
and many more orders and whatnot!
I'll skim over all of their orders,
so that this'll quickly be over.
There's Theria and then Yinotheria.
The Therians, they give birth to babies
that come out of their moms all shell-less,
while the other subclass still lays eggs.