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makairodonx · 2 months

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Spinosaurus aegyticus hunts for Onchopristis 95 million years ago in what is now the Kem Kem Beds of Morocco

#paleoart #dinosaur #dinosaurs #paleontology #spinosaurid #spinosauridae #spinosaurus #kem kem beds #onchopristis #palaeontology #palaeoblr #paleobiology #paleoillustration #palaeoart #theropods #theropoda #theropod #late cretaceous

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alphynix · 1 year

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Strange Symmetries #15: Serrated Saw-Snoots

Long flattened snouts lined with pointy tooth-like denticles have convergently evolved at least three separate times in cartilaginous fish: in modern sawsharks and sawfish, and in the extinct sawskates.

This repeated "pristification" suggests that saws are just incredibly useful and relatively "easy to evolve" structures for these types of fish, being both highly sensitive to bioelectric fields and able to physically slash and stab to kill prey.

Onchopristis numida was a sawskate known from what is now Northern and Western Africa during the mid-Cretaceous, about 95 million years ago. Up to about 3m long (~10'), it lived in both saltwater and freshwater, and was probably a bottom-dwelling ambush predator similar to modern angelsharks.

Whenever a denticle was lost from its saw, a larger one would grow to replace it, and over the life of an Onchopristis this resulted in an increasingly extreme amount of saw asymmetry.

Modern pristified fish also have rather asymmetrical saws. Sawfish are commonly born with a different number of denticles on each side, while sawsharks add extra denticles of varying sizes as they age, with the ongoing replacement of lost denticles resulting in more uneven arrangements over their course of their lives.

It's not clear if the asymmetry gives any sort of advantage to these fish – but if nothing else it probably doesn't cause them any disadvantage, so there's no evolutionary pressure to stay more symmetrical.

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#science illustration #strange symmetries #paleontology #paleoart #palaeoblr #onchopristis #sawskate #sclerorhynchoidei #rajiformes #batoidea #ray #chondrichthyes #cartilaginous fish #fish #art #pristification #snootfish #that is an excellent snoot #convergent evolution

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cris1702 · 10 months

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Spinosaurus and Onchopristis lineart and size comparision

#spinosaurus #Onchopristis #bahariya #egypt #paleoart #lineart

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toaarcan · 2 years

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>Be a sawfish the size of modern Great White Sharks >Primarily known as dinner for the world’s biggest duck

#Onchopristis #Spinosaurus #Palaeontology #Paleontology #Palaeomeme #Paleomeme #Meme

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tff-praefectus · 1 year

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Onchopristis numidus sawfish rostral barbs

#onchopristis #fossil #fish #sawfish #dinosaur

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veloci-raptor · 1 year

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Fauna of the Kem Kem Beds

#araripesuchus #aegisuchus #alanqa #deltadromaeus #rebbachisaurus #onchopristis #elosuchus #carcharodontosaurus #spinosaurus #kem kem

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the-immortal-angel · 1 year

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#Jurassic World The Game #Jurassic World #Onchopristis #My Art

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qqweebird · 1 year

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i never want to see another exogyra AGAIN !!!!!!!!!!!!!!!!!!!

#birdsong #paleo field trip. it was fun and i found some good stuff but christ almighty #it was like you could hardly see anything but the exogyra #someone found one that was easily 5-6 inches across #by favorite finds were a bit of a crab leg a couple shark teeth and i think onchopristis teeth? and fish vertebrae #and some nice gastropod steinkerns!! and a few modern bones n gastropod shells

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knuppitalism-with-ue · 9 months

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Results from the second #SharkWeek #paleostream. Orodus, Keasius (scaring some small ballen whales), Haimirichia (with a baby Onchopristis) and Harpacanthus

#sciart #paleoart #paleostream #palaeoblr #sharks #shark week

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wendigokrow · 2 years

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sketch of a Spinosaurus hunting an Onchopristis WIP.

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makairodonx · 11 months

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Fisherman of the Kem Kem Beds - Spinosaurus aegypticus with a freshly caught Onchopristis in its pelican-like mouth

#dinosaur #paleoart #dinosaurs #spinosaurid #spinosauridae #spinosaurus #onchopristis #Kem Kem beds #cretaceous #late cretaceous #paleoillustration #paleontography #paleontology #mesozoic #theropod

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spinosauretcon · 3 days

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Week 10: 4/03/2024

This week we have been trying to get the narration part of our game working and planning on how we'll do the script while also updating some of our existing features like the enemy AI and the food and health mechanics. The 1915 Spinosaurus model was also finished and the animation process for that has begun. Other dinosaurs models are also being modelled such as the Onchopristis and the Mansorasaurus. The previous model is currently in the rigging phase, we are also working on a pause menu mechanic.

#dinosaur #game dev blog #game developers #game development #salforduni

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dinosaurgame99 · 2 years

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#JurassicWorldTheGame

#JurassicWorldAlive

#DINOSAURS

#DINOSAURSGAME

#youtube

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paleoart · 3 years

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Another quick remake of an older piece; A female Spinosaurus wades through her native waterways while a bold Onchopristis swims nearby. Original from 2013.

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#palaeoblr #paleoart #spinosaurus #dinosaurs #fish #africa #cretaceous #river #onchopristis #remake

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chameleocoonj · 3 years

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