#xenacanthus

[topquarkintown]

#devonian #dunkleosteus #eurypterid #paloeart #paleontology #prehistoric sharks #xenacanthus #stethecanthus #painting

[alex-fictus]

What group of animals should come next??

#paleontology #paleoart #shark #ancient shark #megalodon #helicoprion #xenacanthus #stethacanthus #mosasaurus #dunkleosteus #paleontologist #my art #my stickers #stickers #sticker art

[antiqueanimals]

Pleuracanthus and Amblypterus. Zdeněk Burian.

via

#prehistoric #prehistoric marine life #xenacanthus #amblypterus #Zdeněk Burian

[pleistocene-pride]

Orthacanthus is an extinct genus of fresh-water xenacanthid shark which lived throughout the rivers, swamps, lakes, and bayous of what is now Eurasia and North America during the Emsian of the early Devonian to the Carnian of the Late Triassic some 407 to 227 million years ago. The first remains of orthacanthus consisting of several neural spines and vertebrae were unearthed from carboniferous rocks in Great Britain by Dr. Louis Agassiz in 1836 which he described as a species of primitive skate. Several more spines and teeth would be found throughout England, Scotland, Wales, Ireland, Nova Scotia Canada, and Ohio USA but were variously assigned to Pleuracanthus and Diplodus. In 1848 a well preserved full body impression of an animal was unearthed near Ruppelsdorf Germany by Dr. Goldfuss who described and named the specimen as Xenacanthus. However additional findings in texas of both Orthacanthus and xenacanthus in the 1880s showed a marked distinction in both size and morphology between the two taxa. These prompted additional studies which showed the German impression to be of orthacanthus and that Dittodus, Didymodus, Diplodus to be synoynomous with orthacanthus and that pleuracanthus was already an established genus of beetles as such all previous pleuracathus fossils are now considered orthacanthus. Today 11 species of Orthacanthus are considered valid: O. gibbosus, O. arcuatus, O. buxieri, O. compressus, O. donnelljohnsi, O. gracilis, O. milleri, O. minor, O. platypternus, O. pustulosus, & O. texensis. Reaching upwards of 10ft (3m) in length, Orthacanthus had a number of features that distinguished it from modern sharks including a ribbon like dorsal fin which ran down nearly the entirety of the animals back, and had paired pectoral & pelvic fins and 4 anal fins. A distinctive spine projected from the back of the head which is speculated to have been venomous, perhaps in a similar manner to a sting ray or chimera. As a large aquatic predator Orthacanthus would have fed upon boney fish, placoderms, sharks and other cartilaginous fish, amphibians, aquatic reptiles, synapsids, and various invertebrates. Interestingly orthacanthus seems to have been a highly adaptable organism with smaller and younger individuals living in shallower waters like ponds, rivers, and streams, while larger older individuals dwelled in freshwater lakes, brackish swamps/ deltas, and even coastal waters.

Art by the following creators:

Orthacanthus: Christopher DiPiazza http://prehistoricbeastoftheweek.blogspot.com/2013/08/orthacanthus-prehistoric-animal-of-week.html

Orthacanthus: Connor Moore https://www.artstation.com/artwork/3do4b2

Orthacanthus: Alain Beneteau https://blog.everythingdinosaur.com/blog/_archives/2016/08/11/orthacanthus-was-a-cannibal.html

Orthacanthus and Xenacanthus: EsthervanHulsen https://www.deviantart.com/esthervanhulsen/art/Orthacanthus-and-Xenacanthus-772704178

Diving with Orthacanthus: HodariNundu https://www.deviantart.com/hodarinundu/art/Diving-with-Orthacanthus-798344700

#pleistocene pride #pliestocene pride #extinct #shark week #shark #mesozoic #paleozoic #triassic #carboniferous #devonian #permian #prehistoric #prehistoric shark #orthacanthus #xenacanthus #freshwater #xenacanthid

[romigodon]

🦈 After about a year of work, I am proud to say that Sharks! : The Meg, The Monsters, and the Myths has finally opened to the public @hmns . 🦈

Us in the paleo-lab have worked so hard on everything from Megalodon teeth to pathological baleen whale jaws to Edestus teeth whorls. One of things I’m most proud of is the Xenacanthid shark dorsal spines from the early Permian of Texas (287-283 MYA) that I, and my colleague Colin Diggins, identified, excavated, and prepared over the last few months. These spines, as well as some teeth, are now on display for everyone to see (so come see them 👀).

What an fantastic way to ring in the summer and I’m proud to have been part of something as cool as this is. My most special thanks to all of my awesome lab volunteers (we couldn’t do it without y’all!) and, of course, Colin, David Temple, and @chuckleah7 . We set up a great team and got some great stuff accomplished. I can’t wait to see what else we’ll do coming up!

#romigodon #paleontology #permian #xenacanthus #museum life

[newlabdakos]

Xenacanthus

(temporal range: 382.7-208 mio. years ago)

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

Xenacanthus (from Ancient Greek ξένος, xénos, 'foreign, alien' + ἄκανθος, akanthos, 'spine') is a genus of prehistoric xenacanths. Fossils of various species have been found worldwide.

#science #paleontology #xenacanthus

[liquidstar]

Need you guys to not judge my search history real quick bc I wanna share the fact that my phone brightness is on really low, and I kept trying to wipe away what I thought was a stain only to look closer and see it was in fact Xenacanthus.

#for the record the reason it's all animals that start w certain letters is bc i play a game w the kids where they have to say an animal #that starts w a specific letter and sometimes it's easier to just be looking at the list of what they'll say #and i clicked on xenacanthus by misatke lol #anything bellow that tho i don't really have an excuse for. sorry. #rhesus monkey and apes weren't even for the game that was for me

[gailiag]

Three Stormblood legends down, three to go!

#got the sculptors for the steth intuition on like the last possible cast. was convinced i wasn't even gonna get a chance at it #but lo and behold #it worked out #xenacanthus took me 13 windows #but honestly wasn't too bad since it's only time-gated #now all i have to do is catch uh #ruby dragon #yaaaaaaaaaaaay #ffxiv #postrii #fishtrii #etrii hartrael

[plounce]

xenacanthus tormenting me. tbh legendary fish that happen daily regardless of weather are such relentless punches in the face. like oh ruby dragon is up tomorrow for once, might as well try! ahaha, next time in like 3 days if i remember ^^ meanwhile oh its 10 am ezt. time to go drown myself in lake tusi mek'ta. again.

#chirps #ffxiv

[terramythos]

Number of Heavensward fish left: 1 (Bobgoblin Bass)

Number of Stormblood fish left: 9 (Xenacanthus, Garden Skipper, Hak Bitterling, Warden of the Seven Hues, Blade Skipper, Suiten Ippeki, Duskfish, The Unconditional, The Ruby Dragon)

the timers on some of these are so long I may unironically start Shadowbringers

#my posts

[withheartsaligned]

throwing back hi-cordials like cans of shitty beer while i try to catch xenacanthus

#adrian.txt

[sharks-sharkie-blog]

not sure if youve already been asked but do you have a favorite prehistoric shark?

and/or opinions on dunkleosteus

i absolutely ADORE Xenacanthus <3

silly little guys :,)

and

i think dunkleosteus are so silly lookin. they look like they wear helmets. i dont know much bout them but i always come across them on the internet. would love to hear more bout the big boys

#shark talks #shark #sea life #animals #ocean #ocean life #sharkblr #sharks #hyperfixation #save the sharks #prehistoric

[starfieldhouses]

A scene from the carboniferous prints available! https://www.inprnt.com/gallery/starfielddomicile/after-the-storm-the-carboniferous/ Species depicted: A couple of Hibbertopterus wading through the shallows, a shy Arthropleura hiding under the debris, a young Eryops, scurrying off with a piece of: the enormous lungfish Rhizodus, Some generic orthocones and nautiloids, a beached xenacanthus, the spider-like megarachne, a few mazothairos, a sneaky pulminoscorpius, And of course everyone's favorite Meganeura, carrying an unlucky tullimonstrum

#paleoart #paleontology #prehistoric #animals #bugs #insects #zoology #ancient #paleozoic #science art #creatures #critters #extinct #lifeforms #botany #amphibian #fish #mollusks #invertebrate #blender3d #procreate #fossil #fossil fuel #swamp #bog #marsh #soggy #moist #wetlands #I wish I had a time machine

[sheepcreature]

PINNED POST!!

HI HI HELLO!! You can call me Sheep (or Rowan), I go by any pronouns + cyber/bot

This is my main blog! No specific purpose given that I tend to go on rambles on whatever crosses my mind lol

previously under the handle of rowanberriez, before I deactivated and moved here.

I also run the following blogs:

@xenacanthus - no idea yet, probably the Invader Zim side blog

@surgeonjester - Garten of Banban side blog

@fleshandwires - Transformers/Mecha/Robot side blog

Tag System (tba)

While I don't have a proper DNI list, I would appreciate it if people who heavily participate in the whole "anti and proship discourse" or if your blog is dedicated exclusively to it, to avoid interacting with me, I had bad experiences with people on both sides before.

zionists and neo-nazis fuck off

#pinned post

[hikari-ni-naritai]

nah actually ill be honest. all the expansion legends have had really specific feelings to them and they were good in their own right. heavensward ones were like bullshit kinda in that same way the rest of heavensward was kinda jank. with their like. tiny intuition windows youd have to trigger as many times as you could in their uptime window. it was frantic and frustrating and awful and beautiful in a way. and then stormblood was, much like the expansion as a whole, much more grounded and felt like a new baseline for how legendary fish would work going forward. they were simple but hard, and (except for stethacanthus (dni)) had reasonable windows. ruby dragon's insane big fish mooch chain is so straightforward but completely brutal. shadowbringers was like an extrapolation of this. listracanthus is xenacanthus with a weather requirement. lancetfish is drepanaspis with a fucked up time requirement. skaan is the unconditional but for 90 seconds. and the others dont map quite so well onto stb fish, but they generally feel more elaborate. triggering intuition in a rare window with 10 eggs, a triple mooch you've got like one or two shots at before the window closes, aquamaton. just a really good set of legends.

and much as i hate to say it, the endwalker ones just . dont feel like theres any vibe theyve got. the whale's brutal in a certain kinda way, parexus harkens back to heavensward style intuitions, salad 2 is just a more common skaan, moon legend is common and bites often so the challenge is just that its got a low catch rate, the big lizard is an easier heavensward style one, and garlicfish is like. idk, maybe deceptively simple? but idk they just feel so disconnected and easy (except whale who is hard by virtue of his intuition being really fucking hard to open).

and ngl outside of whale and moon their designs are kinda uninspired. the collection doesnt look as iconic as the other ones when youve got them all sat out side by side. which i guess was KINDA the case with heavensward but they were just getting started, its fine.

#ffxiv #i still am gonna have fun catching them all of course

[cynthffxiv]

COMPLAINING WORKS.

I complained out loud to my gf about how I have spent like, a week now trying to catch Xenacanthus, like 6 windows a day on this fucker, and RIGHT AFTER I SAY IT, THE LINE FINALLY DOESN'T SNAP

#txt #GOOD RIDDANCE TIMMON BECK FISHING HOLE #fishing adventures