#eusthenopteron

[alex-fictus]

The Fish-o-Pods!

Thanks to these guys you get to vote and pay taxes. What a world! It may not a direct lineage of fish -> fish-o-pod -> not a fish like we see in some diagrams; some of these guys may have lived too close in time to one another to be direct relatives. They do show the progression of lobe finned fishes (like Eusthenopteron) to more land oriented creatures (like Ichthyostega) Stickers here!

Free Phone Wallpaper Links: Eusthenopteron - Acanthostega Tiktaalik Hynerpeton - Ichthyostega

[mokeonn]

Eusthenopteron in hats

[blaiddydsaurus]

Some devonian fellas

[newlabdakos]

Eusthenopteron

(size: 1.5 to 2.1 m / 4.9 to 6.9 '; temporal range: 385 mio. years ago)

[text from the Wikipedia article, see also link above]

Eusthenopteron (from Greek: εὖ eû, 'good', Greek: σθένος sthénos, 'strength', and Greek: πτερόν pteron 'wing' or 'fin')[2] is a genus of prehistoric sarcopterygian (often called lobe-finned fishes) which has attained an iconic status from its close relationships to tetrapods. Early depictions of this animal show it emerging onto land; however, paleontologists now widely agree that it was a strictly aquatic animal.[3] The genus Eusthenopteron is known from several species that lived during the Late Devonian period, about 385 million years ago. Eusthenopteron was first described by J. F. Whiteaves in 1881, as part of a large collection of fishes from Miguasha, Quebec.[4] Some 2,000 Eusthenopteron specimens have been collected from Miguasha, one of which was the object of intensely detailed study and several papers from the 1940s to the 1990s by paleoichthyologistErik Jarvik.

[he-who-needs-to-be-silenced]

By the way if I continue the series in Canada it’ll mostly be fish

I have hit 1k notes on one of my posts 🎉🎉

[ostracartderms]

Eusthenopteron trying to eat an acanthodian in a Devonian estuary.

[simdertalia]

🔍🦎 ACNH Museum Fossils Set 4 🦖🔍

Sims 4, base game compatible. 26 items

I hope you enjoy!

Always suggested: bb.objects ON, it makes placing items much easier. For further placement tweaking, check out the TOOL mod.

Set Contains: Buy: -Acanthostega | 1 swatch | 924 poly -Amber (mosquito inside) | 2 swatches | 869 poly -Ammonoidea | 1 swatch | 610 poly -Anomalocaris | 1 swatch | 734 poly -Archaeopteryx | 1 swatch | 1622 poly -Australopithecus | 1 swatch | 418 poly -Coelacanth Display | 1 swatch | 1398 poly -Coprolite | 1 swatch | 654 poly -Dino Track | 1 swatch | 1044 poly -Display Cloche | 1 swatch | 964 poly -Display Info 1 & 2 | 4 swatches each | 370 poly each -Display Pedestal | 3 swatches | 38 poly -Display Table | 2 swatches | 782 poly -Doorway Sign | 2 swatches | 150 poly -Emergency Exit Sign (glows) | 4 swatches | 112 poly -Eusthenopteron | 1 swatch | 1368 poly -Juramaia | 1 swatch | 810 poly -Meteor Ceiling Decor | 1 swatch | 471 poly -Myllokunmingia | 1 swatch | 410 poly -Shark Display | 1 swatch | 2170 poly -Shark Tooth Pattern | 1 swatch | 800 poly -Trilobite | 1 swatch | 1011 poly -Wall Object (with red light) | 2 swatches (one for green light) | 508 poly -Wall Vents | 1 swatch | 262 poly

Build: Floor: Rubber | 6 swatches | Linoleum & Misc

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[mineralsrocksandfossiltalks]

Monday Musings: From Fins to Feet

About 131 million years after the first fishes appeared, the first tetrapod climbed on to dry land. Tetrapods are animals with four weight-bearing limbs (among other things but we're here to discuss limbs). Amphibians, reptiles,

birds, and mammals are all tetrapods. Yes, you are a tetrapod.

So where did all the tetrapods come from? Fish of course! You are a very, very derived fish.

And those poor fish had a lot of hurdles to jump before they could exploit the resources on dry land. The biggest one was how the heck they were going to move around up there. Fish cannot support their own weight, there's no need when the water does it for you.

In fact, marine animals in general use the water for support and will suffocate under their own body weight if beached. Water is one of the reasons whales can get so big while land animals are limited.

Skeletons had to make some major changes before they could be useful out of the water. The vertebral column of fish are adapted for the stresses of lateral stretching during swimming.

For a tetrapod, the main force acting on it is gravity. This means the backbone needs to be modified to keep the body from sagging between the limbs like a pair of overlarge pants not held up properly by a belt. (I mean, our ancestors went through a lot of effort to lengthen the limbs to make walking easier and some people go and sag their pants like the wish to be fish all over again.)

Not only must the spine be altered but so must the fins. They simply can't support weight let alone move that weight anywhere. That's not what they were evolved for.

Sarcopterygian fishes, also known as lobe-finned fishes, developed early arm bones in their fins, bones other fishes lack. This allowed them to pull themselves across land (whether that was underwater or not) much like an army crawl.

Eusthenopteron foordi is one such fish. Part of the family Tristichopteridae, it possessed very early forms of the modern tetrapod arm and leg. Its front fin was attached to the back of the skull and the limb bones were very short. These two characters combined to make movement of the front fin very limited.

Another lobe-finned fish of note is Panderichthys rhombolepis.

Its humerus was nearly twice the length of Eusthenopteron's and its radius was longer and wider, while its carpals shrunk.

Its humerus was also held more horizontally than vertically, closer to the tetrapod state. However, its pelvic girdle was less derived than Eusthenopteron.

The final sarcopterygian that nailed some of the transition from fully aquatic to partially aquatic was Tiktaalik roseae.

It has very robust bones in the pectoral fins, good for eventual bearing weight. However, it still retained the fish-like metapterygial axis, a line of bones which the fin radiates around.

It didn't quite have a wrist yet, but its fin was flexible like a wrist which may have helped anchor it in fast currents. Although not entirely preserved, the hind limbs were nearly as long as the front limbs, a tetrapod trait.

Then came the stem-tetrapod, Acanthostega gunnari. It possessed four limbs but the front limbs could not bend forward at the elbow and therefore could not be put in the weight-bearing position. Another remarkable thing about its feet was that it had eight toes! EIGHT! Seems a bit excessive if you ask me.

It's pelvic girdle was fused with the sacral ribs of the vertebral column which was novel for the time. (The pelvic girdle is unattached even from itself in fish.)

Finally, we have Ichthyostega stensioei. It had four robust limbs that could actually support its body on land for a short time.

And that is how vertebrates transitioned from water to land...at least as we know it right now. Tune in tomorrow for some trivia! Fossilize you later!

[informationisinteresting]

Tiktaalik is such an important fossil species! Studying this species along with Acanthostega, Eusthenopteron, Ichthyostega, and Panderichthys. We can better understand the sea to land transition that took place so long ago!

[dykegeology]

eusthenopteron I live you but I think next time I will draw a catfish shark ray chimera skate moray eel sturgeon paddlefish sailfifn blennie combtooth blennie hagfish or perhaps lamprey

[notachaconne]

It's possible to both stream and buy the Life on Earth soundtrack.

I'm listening to it now and this should SO be in concert halls. I wonder if he kept the score.

Track listing:

Life On Earth Begins in the Sun's Energy

First Fossils/Blue Greens/Ciliates

Comb Jellies/Hydromedusae/"Birth" of a Medusa/Gymnopedie for Jellyfish

Coral Larvae/Arabesque for Flatworms

The Giant Clam/Slow Dance for Nudibranches/Glaucus and Valella

The Sex Life of the Fern/Spores, Fertilization and Growth/Pine Cones and the Petrified Forest

Coming Out Music/The Leaf Bug/The Spiny Leaf Insect Sheds Its Skin/Cocoon Spinners

Fish of the Sea/Shoals and Loners On the Reef

Eusthenopteron and the Primeval Swamp

Nile Crocodile Family/Oral Transport for the Young

Mating Dance for Prairie Garter Snakes

Birds in Flight/Stork/Fairy Tern/Sooty Tern/Tropic Bird/Frigate Bird/Albatross

A Gallimaufrey of Small Mammals/Duckbilled Platypus Swimming/Desman Underwater/Pygmy Silky Furred Anteater and Baby/Flying Foxes/The Serval Pounces

The Big Mammals/Elephants and Their Ancestors/Lion Hunt/Wildebeeste Stampede/Lion Kill

Japanese Macaques/Warm Baths in a Snowscape

Man/A Choice for the Future of Life On Earth?

[alex-fictus]

Fish of the Paleozoic! ... holy lobe fins, I have so many Paleozoic fish xD

Find these and fish from the Mesozoic and Cenozoic in my Ancient Fish Listing!!

Sacabambaspis - Astraspis - Birkenia

Eusthenopteron - Bothriolepis - Cephalaspis

Materpiscis - Titanichthys - Dunkleosteus

Hyneria - Rhizodus - Coelocanthus

Shop || Phone Wallpapers

[nordarknessdimsthesky]

thoughts on prehistoric fish?

i love coelacanths but that feels like too basic of answer for your query

so i went digging and i now adore haikouichthys -- the earliest known fish that was about the size of a thumbnail. his best quality is his wiggles imo

here's eusthenopteron, a large (>6.5ft) boy with lobed fins and teeeeth for days

[kdinjenzen]

GOOD NEWS! Guess what the fish were able to do!

[id: An image showcasing the cladogram of the evolution of tetrapods showing some of the best-known transitional fossils. It starts with Eusthenopteron at the bottom, indisputably still a fish, through Panderichthys, Tiktaalik, Acanthostega and Ichthyostega to Pederpes at the top, indisputably a tetrapod.]

“If tumblr shut down what other social media would u use” you are literally asking a fish what it would do if all the water in the world dried and it had to live on land

[gatorize]

eusthenopteron before they Cut Her Up

[antiqueanimals]

From Prehistoric Animals, written/illustrated by William E. Scheele. 1954.

1.) Eusthenopteron

2.) Dipterus