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Natural Science Forum / Biology / Paleontology / July 2006Plesiosaurs
Were plesiosaurs fish, amphibians, or reptiles?  SignatureReply in group, but if emailing add another zero, and remove the last word. > Were plesiosaurs fish, amphibians, or reptiles? Reptiles. Diapsids. Lepidosauromorphs. Sauropterygians. > > Were plesiosaurs fish, amphibians, or reptiles? > > > Reptiles. Diapsids. Lepidosauromorphs. Sauropterygians. So, is there any indication that they were air breathing, or if any species had gills? SignatureReply in group, but if emailing add another zero, and remove the last word >>>Were plesiosaurs fish, amphibians, or reptiles? >> >>Reptiles. Diapsids. Lepidosauromorphs. Sauropterygians. > > So, is there any indication that they were air breathing, or if any species > had gills? Gills, being soft and squishy, are very rarely preserved as fossils. Some animals with gills have bony supports or covers for them, but some don't. However, considering that no living amniotes have gills and that there is no evidence for any extinct amniote ever having had gills, it's safe to bet that plesiosaurs didn't either. It's also highly probable that they didn't have feathers or flowers. > >>>Were plesiosaurs fish, amphibians, or reptiles? > >> [quoted text clipped - 9 lines] > safe to bet that plesiosaurs didn't either. It's also highly probable > that they didn't have feathers or flowers. On the subject of plesiosaur respiration, I can't help but wonder how elasmosaur went about breathing. That's an awfull long and thin windpipe. I suppose being (presumably) ectothermic helped. > On the subject of plesiosaur respiration, I can't help but wonder how > elasmosaur went about breathing. That's an awfull long and thin > windpipe. 'Twould help summat were the esophagus heavily lined with capillaries. |
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