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Hyrotrioskjan — Cretolamna
#cretaceous #dinosaur #marocco #reqiem #shark #sharks #eocene #cretolamna
Published: 2014-10-01 19:13:22 +0000 UTC; Views: 17819; Favourites: 273; Downloads: 184
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Description
Quick small watercolor painting of an extinct shark known from the Cretaceous and Eocene of North america and northern Africa. As much as I know this genus was present in North america during most of the Cretaceous while the african population begun to rise with the end of the non-avian dinosaur era (this was first meant to be part of my Spinosaurus-snack series, if you know Cretolamna from the Cenomanian of Egypt or Marocco pleace share).This reconstruction is mostly based on this fossil: en.wikipedia.org/wiki/Cretolam… but also modern sharks.
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Comments: 47
Wonder why sharks are able to survive many mass extinctions through their history. They were once top predators, replaced, and being the top again. Did bigger organism tend to have weaker immune system?
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Not just sharks in general, but individual genera and even species.
C. megalodon lasted 25 million years as a single species. Its genus (Carcharocles) lasted 45 million years. The group it belongs to, the otodontids, lasted 60 million years.
And Cretolamna lasted from the Early Cretaceous to the Late Miocene.
The ultimate record goes to Hybodus houtienensis which lasted from the Permian to the very end of the Cretaceous as a single species, surviving the P-T event, T-J event, the end-Jurassic minor mass extinction, the Cenomanian-Turonian anoxic disaster, and only went extinct at the K-T extinction-but its descendants survived that too.
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Well, Hybodus sure was the tough one
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When one species lasts 100 million years and leaves descendants that live on for another 50 million years, you know that species is successful as hell.
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And with all that given times, they never invented fire....
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The bigger you are the wider you fall
Sharks are very successful animals because most of them aren't very specialized and have a bauplan which is in many aspects near perfection.
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The incredible thing is that this genus made it into the Miocene.
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Indeed, it was a interesting temporal range
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That is an even larger temporal range than Megalodon. It lived through multiple mass extinctions.
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There are too many Megalodon, and beside the size it's not really a interesting animal for me
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Wait is it freshwater or saltwater? Also where does the "lamna" part of it's name come from?
Anyways, just as good as always ^.^
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Lamna is the greek word for "fish of prey", which was derived from the greek creature Lamia.
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Thanks
Most likely it preferred brackish water or both but I don't know what lamna means, old greek or latin.
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I've been really interested in Cretolamna recently. What is your opinion on the view that it is an otodontid?
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That wasn't so important for me actually 
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Been thinking about sharks all day... Oddly perfect timing.
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Great drawing, specially the colors used.
About if Cretolamna lived in the Cenomanian in Africa, I only found this article: hal.archives-ouvertes.fr/docs/… in fact, is about of the Charentes locality in the south of France, but includes teeth possibly of Carcharodontosaurus and some fossils in common with the coeval Kem Kem beds, and there has been discovered the presence of Cretolamna appendiculata.
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Thank you
France is maybe not a direct evidence but I will put this guy back on the "maybe" list
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A predator of deep lakes and open water, I presume, with that streamlined body. In any case I'm calling it the bull shark of the Mesozoic
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Haha, maybe, but there where many other sharks in the past which lived in freshwater habitats, also modern looking guys, I would more say bull sharks are like Cretolamna
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Hybodonts especially had a few freshwater individuals among their ranks
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Very cool! So you are still continuing this series then?
Edit: I just read what you said about it being from the wrong time so just ignore that question. Anyway, are you going to continue the "Spinosaurus-snack" series?
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I try it, I'm always try to get a full view of an ecosystem, I'm also read about the plants of the Bahariya formations, it's other dinosaurs and crocodiles, even it's mangrove dwelling carrion eating crabs to understand the whole environment Spinosaurus was living in.
In the moment I try to find information on the turtles of egypt and marocco during the campanian...
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Oh, sorry I meant Cenomanian
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It looks great, I'm always amazed by your coloring!
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Das haben Makrelenhaie so an sich
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Hm... Ja.
So modern!
In der Kreidezeit schien sich ja der Trend schon durchzusetzen...
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Die klassische Haiform gibt es glaube ich sogar schon seit dem Perm aber die Kreidezeit war wohl in der Tat ein wihtiges Zeitalter für die Vorfahren unserer heutigen Haie!
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Im Prinzip fing's ja schon im Devon an...
Cladoselache hatte ja schon eine relativ moderne Form...
Nur hab ich das Gefühl, dass die Diversität der Haiformen in der Kreidezeit abnahm.
Zwar gibt's zwar heute noch ein pasar schräge Formen, wie Koboldhaie, Kragenhaie und Engelhaie, aber nicht mehr so unglaublich viele.
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Das stimmt schon, seit dem Jura wurde nicht mehr so viel herum experimentiert, aber das hängt wahrscheinlich auch mit dem Erfolg anderer Gruppen zusammen so fast nur noch in ihrer All times favorite Form auftreten, man denke nur an all die anderen großen Raubfische und Meeresreptilien zum Ende des Mesozoikums.
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Ja, da es auch nicht mehr so viel gibt, was einen verschlucken könnte, waren Hörner und Flossenstacheln auch langsam out...
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