tetrapod way vs the gnatostome way vs the chordate way

this is in equal part shitpost and an tought i had somethimes :

have you guys noticed how many times there are animals that do a similar task but use different body part to do so ?

for examples : naked mole rats use their theet to dig , while moles use their front paws to dig , while burrowing snakes use their muscular body and a reinforced head to burrow trough the ground

in the same way in wich elephants use their lip/nose ( we could call it trunk but you'll see my point ) to browse , and giant sloths, calicotheres and therizinosaurs (wich btw are an amaizing example of convergent evolution) used their front legs to accomplish this task , giraffes , hiracotheres and sauropods instead lenghetend their neck to reach things

and how wolves and hyenas use their strong jaws to take preys down , while big cats and bear dogs used their paws to restrain the prey , while on the other hand big constrictor snakes use their body to coil around and strangle their prey ,

or sea iduanas and crocodiles using their long tail to swim in turbulent waters , while sea turtles use their legs instead

this could also be seen in speculative evolution : humans use their arms to manipulate tools , while things like the avisapiens use their mouths to manipulate tools ,

this is because there are mainly three parts of the skeletal structure of tetrapods : the neural spine , the skull and the jaws , and the legs ,

these three structures can be used to create different results and can all be functional ,
this is i guess was kind of the opposite of convergent evolution : similar creatures using different strategies to do the same thing , and sometimes converging with species wich are completely different from them ...

idk honestly what is the point of this post i just wanted to point out somenthing i notice ofthen ,

it's looks like different martial arts almost ...

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๐Ÿ‘ค︎ u/dgaruti
๐Ÿ“…︎ Dec 20 2021
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What sorts of environmental pressures could prompt a lobe-finned fish to evolve into the six-limbed chordates of mythology (salamanders, centaurs, griffins, hippogriffs, pegasi, cherubs, the dragons of Middle Age Europe)?
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๐Ÿ‘ค︎ u/JohnWarrenDailey
๐Ÿ“…︎ Jan 06 2022
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The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today. Among them were the chordates, to which vertebrates such as humans belong. youtu.be/Tj-hi2K0sFY
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๐Ÿ‘ค︎ u/operadrama92
๐Ÿ“…︎ Dec 06 2021
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Phylogeny of Chordates

https://docs.google.com/spreadsheets/d/1hQ_11NL9V0znXb7rRrmcPX1GA6-cFDTRvlk-yWaF1WY/edit?usp=sharing

Here is the culmination of a year's worth of work (off and on) or my phylogenetic tree of Chordates. It's a spreadsheet so it's kind of weird, and it's best viewed at 100% zoom so the lines match up.

A few things about the presentation. almost all cells represent about 5 million years. Each colored blocked is a family, with their length roughly corresponding to their duration. The lines connecting the families and the nodes between them are NOT representative of when the lineages are theorized to have diverged. The family colors are often traditional taxonomic orders or other helpful groupings. They may be paraphyletic but never polyphyletic. A few nodes are labeled with classic and important clades.

I have done extensive research on wikipedia, fossilworks, and any academic papers I could find when those didn't suffice. Many of these relationships are not resolved, and in some cases I had to determine them on my own based on the age and geographical range of families. The phylogeny of fishes is especially unclear at the level of orders.

Where major dispute exist about relationships, I had to make executive decisions based on all the research I done. Notable examples include the Ornithoscelida hypothesis, Lepospondyli-Lissamphibia derivation, a paraphyletic Placodermi with respect to later Gnathostomes, and nestling Testudines as a sister-clade to Archosaurs.

This science is ever..."evolving", and many of these relationships are subject to change. I'd love to talk and discuss about them and what new findings have to say, and explain my choices.

Thanks and have a good day!

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๐Ÿ‘ค︎ u/TheDarvatar
๐Ÿ“…︎ Jul 09 2021
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Non chordates are cute too!
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๐Ÿ‘ค︎ u/Gumbybum
๐Ÿ“…︎ Sep 25 2021
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BIO 344: Chordate Zoology Advice

Any thing I should watch out for in this class next semester? Any advice you would be willing to share

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๐Ÿ‘ค︎ u/SnooPuppers4019
๐Ÿ“…︎ Nov 30 2021
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Tunicates are chordates that start out as tadpole-like larvae, then lose their notochord and live a sessile life as adults!
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๐Ÿ‘ค︎ u/mr_bones-
๐Ÿ“…︎ May 21 2021
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What on Earth Was Ainiktozoon? Ben G Thomas (2021) Originally thought to be a stem chordate but now thought to be an early arthropod. youtube.com/watch?v=d4BMFโ€ฆ
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๐Ÿ‘ค︎ u/alllie
๐Ÿ“…︎ Sep 19 2021
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chordate rule
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๐Ÿ‘ค︎ u/Shnezzberry
๐Ÿ“…︎ Jul 04 2021
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Comparative chordates anatomy BIOL 3350 (Lisa Robertson) vs animal development (Terrance Kubiseski) BIOL 4450
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๐Ÿ‘ค︎ u/eukaryote123
๐Ÿ“…︎ Sep 20 2021
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Early Chordates (without Tunicates)
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๐Ÿ‘ค︎ u/SwissMapper
๐Ÿ“…︎ Jul 26 2021
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Primitive chordates have so much potential for alien yet not completely unrecognizable creatures, I wonder why they're hardly ever touched in spec evo.

https://preview.redd.it/gfp2fa4ewct61.png?width=1300&format=png&auto=webp&s=7eee51e62a6d05a768daeabe84da4bde0550971d

https://preview.redd.it/arjfl6tlwct61.png?width=241&format=png&auto=webp&s=734405ad20e17ce4791f24b3e4433eabd168b0a4

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๐Ÿ‘ค︎ u/CoolioAruff
๐Ÿ“…︎ Apr 15 2021
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Pikaia may have been related to the ancestors of chordates, yet it was still separate from them. It was a primitive chordate that was around 1.5 inches (38 mm) long and has been found in the 530-million-year-old Middle Cambrian Burgess Shale in British Columbia. youtu.be/4lMNXUuQwPg
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๐Ÿ‘ค︎ u/Enchiridion88
๐Ÿ“…︎ Jan 29 2021
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there arenโ€™t any Cambrian chordate memes so I made one...
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๐Ÿ‘ค︎ u/OutBeetheSwarm
๐Ÿ“…︎ Apr 22 2021
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Chordates and arthropods and the diversity of land

Okay on our planet chordates and arthropods are the two land living species the take up the majority of the ecosystem. Yes I know there are snails and some other groups but if you're talking about most land living creature is there mainly either a chordate/tetrapod or an arthropod or something along those lines. Is it possible for there to be more then two main groups of land living creatures? For example if mollusks evolved to be more outside of land before the arthropods did would they have shared more nieces or would it be similar how it is today. Or alternatively could mollusks have taken a couple of the tetrapods niches?

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๐Ÿ‘ค︎ u/Dinosbreath
๐Ÿ“…︎ Dec 06 2020
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Palaeospondylus gunni, an enigmatic fossil chordate from the Mid Devonian in Caithness, Scotland. It has been suggested that this animal may represent a larval lungfish, a hagfish, an agnathan, or a basal chondricthyan. reddit.com/gallery/lw2vtc
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๐Ÿ‘ค︎ u/ItsJustMisha
๐Ÿ“…︎ Mar 02 2021
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And Then There Were Threeโ€ฆ: Extreme Regeneration Ability of the Solitary Chordate Polycarpa mytiligera [2021, open-access] frontiersin.org/articles/โ€ฆ
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๐Ÿ“…︎ May 08 2021
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A bat encounters a group of highly derived purely subterranean group of highly derived early chordates call 'Umohs' from the Project Diyu by TrollMans on DeviantArt
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๐Ÿ‘ค︎ u/Arts_and_Axes
๐Ÿ“…︎ Nov 10 2020
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In Vivo Subcellular Mass Spectrometry Enables Proteoโ€Metabolomic Singleโ€Cell Systems Biology in a Chordate Embryo Developing to a Normally Behaving Tadpole (X. laevis)**

Single-cell mass spectrometry was advanced to enable dual characterization of proteins and metabolites in identified cells in Xenopus laevis embryos. The analyzed embryos developed to normally behaving tadpoles with anatomy and visual function indistinguishable from that of their control siblings in a background color preference assay. In vivo single-cell mass spectrometry expands the analytical toolbox of molecular systems, cell, and developmental biology.

Abstract

We report the development of in vivo subcellular high-resolution mass spectrometry (HRMS) for proteo-metabolomic molecular systems biology in complex tissues. With light microscopy, we identified the left-dorsal and left-ventral animal cells in cleavage-stage non-sentient Xenopus laevis embryos. Using precision-translated fabricated microcapillaries, the subcellular content of each cell was double-probed, each time swiftly (

https://ift.tt/2QaPHNc

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๐Ÿ‘ค︎ u/TomisMeMyselfandI
๐Ÿ“…︎ May 26 2021
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Polycarpa mytiligera, a chordate incapable of asexual development, achieves bidirectional regeneration & fully regenerates all body structures & organs after being cut in three pieces; each fragment got to be an independent, functional individual bipartisanalliance.com/20โ€ฆ
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๐Ÿ‘ค︎ u/jordiwmata
๐Ÿ“…︎ May 04 2021
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And Then There Were Threeโ€ฆ: Extreme Regeneration Ability of the Solitary Chordate Polycarpa mytiligera [2021, open-access] frontiersin.org/articles/โ€ฆ
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๐Ÿ“…︎ May 08 2021
๐Ÿšจ︎ report
Pikaia may have been related to the ancestors of chordates, yet it was still separate from them. It was a primitive chordate that was around 1.5 inches (38 mm) long and has been found in the 530-million-year-old Middle Cambrian Burgess Shale in British Columbia. youtu.be/4lMNXUuQwPg
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๐Ÿ‘ค︎ u/Enchiridion88
๐Ÿ“…︎ Jan 29 2021
๐Ÿšจ︎ report
Pikaia may have been related to the ancestors of chordates, yet it was still separate from them. It was a primitive chordate that was around 1.5 inches (38 mm) long and has been found in the 530-million-year-old Middle Cambrian Burgess Shale in British Columbia. youtu.be/4lMNXUuQwPg
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๐Ÿ‘ค︎ u/Enchiridion88
๐Ÿ“…︎ Jan 29 2021
๐Ÿšจ︎ report
Pikaia may have been related to the ancestors of chordates, yet it was still separate from them. It was a primitive chordate that was around 1.5 inches (38 mm) long and has been found in the 530-million-year-old Middle Cambrian Burgess Shale in British Columbia. youtu.be/4lMNXUuQwPg
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๐Ÿ‘ค︎ u/Enchiridion88
๐Ÿ“…︎ Jan 29 2021
๐Ÿšจ︎ report
Single cell RNA sequencing of the Strongylocentrotus purpuratus larva reveals the blueprint of major cell types and nervous system of a non-chordate deuterostome biorxiv.org/content/10.11โ€ฆ
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๐Ÿ‘ค︎ u/sburgess86
๐Ÿ“…︎ Mar 17 2021
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What sort(s) of environmental circumstance(s) would drive forward the evolution of hexapodal chordates (the fish that would be the ancestors of centaurs and Western dragons)?
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๐Ÿ‘ค︎ u/JohnWarrenDailey
๐Ÿ“…︎ Oct 25 2020
๐Ÿšจ︎ report
Pikaia may have been related to the ancestors of chordates, yet it was still separate from them. It was a primitive chordate that was around 1.5 inches (38 mm) long and has been found in the 530-million-year-old Middle Cambrian Burgess Shale in British Columbia. youtu.be/4lMNXUuQwPg
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๐Ÿ‘ค︎ u/Enchiridion88
๐Ÿ“…︎ Jan 29 2021
๐Ÿšจ︎ report
I drew Pikaia gracilens, an extinct chordate from the Cambrian period!
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๐Ÿ‘ค︎ u/WholesomeRedditUser
๐Ÿ“…︎ Aug 16 2020
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Conodonts are small, misshaped fragments that were thought to be their own entities for a long time, until prolonged research revealed them to be the pharyngeal and oral teeth of agnathan chordates. Photo Credits: Mauch Chunk Formation and Life Restoration of Promissum pulchrum reddit.com/gallery/itch8p
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๐Ÿ‘ค︎ u/RAAProvenzano
๐Ÿ“…︎ Sep 15 2020
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So I made a meme about chordate evolution

https://preview.redd.it/ghkrg23oft651.jpg?width=680&format=pjpg&auto=webp&s=6d4664d7f2e2580438c072f0eaf585ec38bb57a1

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๐Ÿ‘ค︎ u/Tunguska_baboonlord
๐Ÿ“…︎ Jun 24 2020
๐Ÿšจ︎ report
๐Ÿ”ฅ The Lancelets are small (~5 cm), fish like animals that's believed to be the closest living relative to the ancestor of the entire Chordate (Spinal cord animals) phylum, which includes humans. ๐Ÿ”ฅ
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๐Ÿ‘ค︎ u/jimi15
๐Ÿ“…︎ Jun 20 2019
๐Ÿšจ︎ report
A putative chordate luciferase from a cosmopolitan tunicate indicates convergent bioluminescence evolution across phyla nature.com/articles/s4159โ€ฆ
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๐Ÿ“…︎ Oct 20 2020
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What if chordates never existed?
๐Ÿ‘︎ 8
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๐Ÿ‘ค︎ u/mcmultra75
๐Ÿ“…︎ Oct 01 2021
๐Ÿšจ︎ report
In Vivo Subcellular Mass Spectrometry Enables Proteoโ€Metabolomic Singleโ€Cell Systems Biology in a Chordate Embryo Developing to a Normally Behaving Tadpole (X. laevis)**

Singleโ€cell mass spectrometry was advanced to enable dual characterization of proteins and metabolites in identified cells in Xenopus laevis embryos. The analyzed embryos developed to normally behaving tadpoles with anatomy and visual function indistinguishable from that of their control siblings in a background color preference assay. In vivo singleโ€cell mass spectrometry expands the analytical toolbox of molecular systems, cell, and developmental biology.

Abstract

We report the development of in vivo subcellular highโ€resolution mass spectrometry (HRMS) for proteoโ€metabolomic molecular systems biology in complex tissues. With light microscopy, we identified the leftโ€dorsal and leftโ€ventral animal cells in cleavageโ€stage nonโ€sentient Xenopus laevis embryos. Using precisionโ€translated fabricated microcapillaries, the subcellular content of each cell was doubleโ€probed, each time swiftly (

https://ift.tt/2QaPHNc

๐Ÿ‘︎ 2
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๐Ÿ‘ค︎ u/TomisMeMyselfandI
๐Ÿ“…︎ Apr 09 2021
๐Ÿšจ︎ report
I've made a meme about chordate evolution

https://preview.redd.it/b216m7lsft651.jpg?width=680&format=pjpg&auto=webp&s=ce86e06f290f30d53d9b42a4295e470c7a97de3b

๐Ÿ‘︎ 14
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๐Ÿ‘ค︎ u/Tunguska_baboonlord
๐Ÿ“…︎ Jun 24 2020
๐Ÿšจ︎ report

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