Coco Posted September 8, 2011 Share Posted September 8, 2011 Hi, Why may I not click on photos to see them whole ? I can't see the head of this shark ! Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
wRick Posted September 8, 2011 Share Posted September 8, 2011 Hi, Why may I not click on photos to see them whole ? I can't see the head of this shark ! Coco Look for a scroll tab at the bottom of your browser window. On internet explorer the pics extend of the right hand side of my screen. I'm going with salmon shark incidentally. "There is no difference between Zen and Purgatory and Time Warner Cable, and they are trying to tach me this, but I am a dim impatient pupil." ----- xonenine Link to comment Share on other sites More sharing options...
Harry Pristis Posted September 8, 2011 Share Posted September 8, 2011 If you look at the third photograph, it appears that the second keel on its caudal peduncle has been either cut or bitten off. ... That must be it! The fellow that scavenged the jaws also removed from the peduncle the secondary keel (and the second dorsal fin) so that we'd have trouble identifying the carcass. I think he took the eyes, too. -------------------------------- There seems to be a consensus building that this is a lamnid shark, even though the tail is not clearly homocercal in the images we have. That's fine with me. I think that Jess has a good idea in suggesting that the images be sent to an ichthyologist. http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
Coco Posted September 9, 2011 Share Posted September 9, 2011 Hi, Look for a scroll tab at the bottom of your browser window. I haven't scroll... The pics are cut. I have seen with Firefox and it is OK. I discover someone had taken the haw of the shark... We can't know the species with teeth... Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Marine Bio Posted October 10, 2011 Share Posted October 10, 2011 As a marine biologist with a specialism in icthyology (in particular deep-sea elasmobranchs and british salmonids) I would say the evidence points toward this being a male salmon shark. As with all science however, identification based on morphology alone can only be a process of disproving options and the ultimate outcome being significantly likely (and thus not absolute proof). The tail is not homocercal, ruling out lamnid sharks. Based on location I would therefore conclude the highest posibility of it being a salmon shark and that the photo or state of decay prevents clear viewing of the secondary keel (though in my opinion it is just visible). Still, an interesting debate to read through though and was nice to see the relatively well informed arguments for both sides. Link to comment Share on other sites More sharing options...
Harry Pristis Posted October 10, 2011 Share Posted October 10, 2011 As a marine biologist with a specialism in icthyology (in particular deep-sea elasmobranchs and british salmonids) I would say the evidence points toward this being a male salmon shark. As with all science however, identification based on morphology alone can only be a process of disproving options and the ultimate outcome being significantly likely (and thus not absolute proof). The tail is not homocercal, ruling out lamnid sharks. Based on location I would therefore conclude the highest posibility of it being a salmon shark and that the photo or state of decay prevents clear viewing of the secondary keel (though in my opinion it is just visible). Still, an interesting debate to read through though and was nice to see the relatively well informed arguments for both sides. Now, you've confused me, 'MBio'. The only way that your assertion, "The tail is not homocercal, ruling out lamnid sharks. Based on location I would therefore conclude the highest posibility of it being a salmon shark", can be true is if the salmon shark, Lamna ditropis, is NOT a lamnid shark. Please explain. http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
MB Posted October 11, 2011 Share Posted October 11, 2011 (edited) Now, you've confused me, 'MBio'. The only way that your assertion, "The tail is not homocercal, ruling out lamnid sharks. Based on location I would therefore conclude the highest posibility of it being a salmon shark", can be true is if the salmon shark, Lamna ditropis, is NOT a lamnid shark. Please explain. You have also confused me, Harry, I'm not relative, i'm only MB Edited October 11, 2011 by MB http://www.mbfossilcrabs.com/ Link to comment Share on other sites More sharing options...
Marine Bio Posted October 11, 2011 Share Posted October 11, 2011 Oops! My bad. Confusion fully understood. My text was supposed to say 'However', not 'therefore'. Sorry again. The argument remains that it is likely to be a Salmon shark in spite of the very heterocercal tail. Link to comment Share on other sites More sharing options...
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