LiamL Posted October 24, 2017 Share Posted October 24, 2017 So finally the keichousaurus that I had chosen has arrived in the mail today. I think it looks great, but i'd like to hear from you guys if it's authentic. Yorkshire Coast Fossil Hunter Link to comment Share on other sites More sharing options...
LiamL Posted October 24, 2017 Author Share Posted October 24, 2017 Yorkshire Coast Fossil Hunter Link to comment Share on other sites More sharing options...
aplomado Posted October 24, 2017 Share Posted October 24, 2017 I'm no expert, but it looks very nice to me! Check it out under a dissecting scope! 1 Link to comment Share on other sites More sharing options...
snolly50 Posted October 24, 2017 Share Posted October 24, 2017 From what can be seen in the photos, I would be proud to display it. 1 Human beings, who are almost unique in having the ability to learn from the experience of others, also are remarkable for their apparent disinclination to do so. - Douglas Adams, Last Chance to See Link to comment Share on other sites More sharing options...
LiamL Posted October 24, 2017 Author Share Posted October 24, 2017 Can anybody tell me if my specimen is male or female? I remember seeing somewhere that you can tell somehow. Yorkshire Coast Fossil Hunter Link to comment Share on other sites More sharing options...
aplomado Posted October 24, 2017 Share Posted October 24, 2017 Bulky armbones are prominent in males, I think. How long is the critter? Link to comment Share on other sites More sharing options...
LiamL Posted October 24, 2017 Author Share Posted October 24, 2017 9 minutes ago, aplomado said: Bulky armbones are prominent in males, I think. How long is the critter? I have not measured personally, but the listing states fossil size 19.5cm x 7.0cm and slate : 20.5 x 12.0 x 1.5 Yorkshire Coast Fossil Hunter Link to comment Share on other sites More sharing options...
oilshale Posted October 24, 2017 Share Posted October 24, 2017 For sexual dimorphism have a look at Kebang Lin's thesis (page 20): Functional Morphology and ontogeny of Keichousaurus hui Reptilia Sauropterygia.pdf A Triassic female marine reptile Keichousaurus hui gave birth to live young 230 million years ago.pdf Thomas 3 Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
aplomado Posted October 25, 2017 Share Posted October 25, 2017 Mine is about the same length and has smaller arm bones... maybe I got a female and you have a male? Link to comment Share on other sites More sharing options...
Bobby Rico Posted October 25, 2017 Share Posted October 25, 2017 Hi all I never thought you could identify the sex of this type of fossil. Thanks for the info , very interesting. I did look at the link but can't say if mine is male or female. Mine is about 26.5cms . if anyone wants to make a guess please do. Nice post thank you and very nice specimens shown hear too. Link to comment Share on other sites More sharing options...
aplomado Posted October 26, 2017 Share Posted October 26, 2017 Here's a pic I found of Male (B) versus Female (A) arms: 3 Link to comment Share on other sites More sharing options...
Bobby Rico Posted October 26, 2017 Share Posted October 26, 2017 41 minutes ago, aplomado said: Here's a pic I found of Male (B) versus Female (A) arms: Thank you. You can really see the differences between this photos. I think I have is a female then. Cheers Bobby Link to comment Share on other sites More sharing options...
LiamL Posted October 27, 2017 Author Share Posted October 27, 2017 17 hours ago, Bobby Rico said: Thank you. You can really see the differences between this photos. I think I have is a female then. Cheers Bobby I thought mine was a male but looking st those pictures im not sure? Yorkshire Coast Fossil Hunter Link to comment Share on other sites More sharing options...
Bobby Rico Posted October 27, 2017 Share Posted October 27, 2017 21 minutes ago, LiamL said: I thought mine was a male but looking st those pictures im not sure? Yes I know I think the male maybe an Keichousaurus Popeye Link to comment Share on other sites More sharing options...
aplomado Posted October 27, 2017 Share Posted October 27, 2017 The male in the comparison pic is pretty big, over 25 cm.... mine is 20 cm, so it is not full grown. I do suspect mine is female though. 1 Link to comment Share on other sites More sharing options...
Bobby Rico Posted October 27, 2017 Share Posted October 27, 2017 13 minutes ago, aplomado said: The male in the comparison pic is pretty big, over 25 cm.... mine is 20 cm, so it is not full grown. I do suspect mine is female though. Mine must be a female as it 26.5cm and fully grown with out Popeyes arms. Link to comment Share on other sites More sharing options...
aplomado Posted October 27, 2017 Share Posted October 27, 2017 Bobby, I don't know... it looks like the forearms are twisted on yours, making them look smaller than they really are... you have a really nice specimen! 1 Link to comment Share on other sites More sharing options...
LiamL Posted October 27, 2017 Author Share Posted October 27, 2017 32 minutes ago, Bobby Rico said: Mine must be a female as it 26.5cm and fully grown with out Popeyes arms. Did they eat Spinach? Yorkshire Coast Fossil Hunter Link to comment Share on other sites More sharing options...
Bobby Rico Posted October 27, 2017 Share Posted October 27, 2017 13 minutes ago, LiamL said: Did they eat Spinach? I don't think ours did 1 Link to comment Share on other sites More sharing options...
Bobby Rico Posted October 27, 2017 Share Posted October 27, 2017 19 minutes ago, aplomado said: Bobby, I don't know... it looks like the forearms are twisted on yours, making them look smaller than they really are... you have a really nice specimen! Thank you and I think you are right the arms do seem twisted. Link to comment Share on other sites More sharing options...
doushantuo Posted October 27, 2017 Share Posted October 27, 2017 from Beardmore et al(must read for those interested in the taphonomy of fossil marine reptiles): Btw: bone contains water. Water loss affects the compressive strength of bone,making slight shape alterations more likely. Btw:NOT saying that's the cause of possible shape change in this case edit: especially not in an aquatic medium 2 Link to comment Share on other sites More sharing options...
doushantuo Posted October 27, 2017 Share Posted October 27, 2017 As regards causes of "dimorphism": This scatterplot hopefully makes clear that the study of dimorphism and/or ontogenetic variation needs samples of a certain size 1 Link to comment Share on other sites More sharing options...
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