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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,378 Views)
Brach™
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hi

Furka
Aug 1 2015, 01:40 PM
Now that I think about it, Europasaurus should be another example, but I'm not sure.
Channel island mammoths, Homo floresiensis, Balaur, etc

Also a lot of hippopotomids from the Mediteranian (the Malagasy, Cretan, Cyprus, Maltese, and Sicilian Hippos).
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Mathius Tyra
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Rat snake is love... Rat snake is life

Balaur is the example of isular gigantism though, it was a basal bird that became flightless after inhabiting in Hateg Islands.
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Paleodude
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ex-Krampus

A couple of island dwarfs include the hobbits of Flores (Homo floresiensis), the malagsy pygmy hippopotamus (Hippopotamus lemerlei), and the Bali and Javan tigers (Panthera tigris balica and Panthera tigris sondaica).
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54godamora
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i thought balaur was a a non-avian dinosaur?
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Posted Image Guat
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54godamora
Aug 2 2015, 11:52 PM
i thought balaur was a a non-avian dinosaur?
A new study actually reclassified Baluar as a basal avian.
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Incinerox
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Āeksiot Zaldrīzoti

Basically it's somewhere roughly where Jeholornis is in the theropod family tree.
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Cheshire Litten
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The Eyes that follow you in the Alolan forests

What other hateg animals were not affected by the Island Dwarfism (apart from Hatzegopteryx)
Edited by Cheshire Litten, Aug 3 2015, 06:31 AM.
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Incinerox
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Āeksiot Zaldrīzoti

Zalmoxes was not really that much different from the ancestral rhabdodontid, with one species being larger than expected. It fits in rather nicely with the increasing size trend between bog-standard ornithischians and the more derived Tenontosaurus.

I don't know the details about its size compared to related species, but Theriosuchus was present and doesn't seem to be notably smaller than its relatives.

Eurazdarcho was average for a non-gigantic azhdarchid, larger than continental American Montanazhdarcho.
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CyborgIguana
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Also, the azhdarchids probably weren't restricted to Hateg Island since they were flying animals. I imagine their remains were just found there by chance and they actually had a wider range in Europe.
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54godamora
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oh could i the link that says that about balaur, please?
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Posted Image Guat
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Very Long Quote


Here's the topic I quoted from.
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SpookDoc
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Have there been any proven examples of sexual dimorphism in ancient reptiles, like pterosaurs or ceratopsians?
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CyborgIguana
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Sexual dimorphism is known in Darwinopterus IIRC, with the males having large soft-tissue head crests and the females being crestless.
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BossMan, Jake
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Son of God

SpookDoc
Aug 3 2015, 06:40 PM
Have there been any proven examples of sexual dimorphism in ancient reptiles, like pterosaurs or ceratopsians?
Yes in some cases like pterosaurs and hadrosaurs we have been able to see that anatomical features like crests were different for genders. Pterosaurs males like pteranodon were also larger than females. However there is no proof I think for ceratopsians although I'm sure there was
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Zoo Tycooner FR
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#Lithopédion

IIRC i had read somwhere that there is Dimetrodon Sexual Dimorphism . Dimetrodon may have been sexually dimorphic, meaning that males and females had slightly different body sizes. Some specimens of Dimetrodon have been hypothesized as males because they have thicker bones, larger sails, longer skulls, and more pronounced maxillary "steps" than others. Based on these differences, the mounted skeletons in the American Museum of Natural History (AMNH 4636) and the Field Museum of Natural History may be males and the skeletons in the Denver Museum of Nature and Science (MCZ 1347) and the University of Michigan Museum of Natural History may be females.

Oh that was here : http://specialpapers.gsapubs.org/content/28/1 and Here : https://en.wikipedia.org/wiki/Dimetrodon#Sexual_dimorphism
Edited by Zoo Tycooner FR, Aug 3 2015, 06:49 PM.
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