tag:blogger.com,1999:blog-8161161431451849208.post3941335291540323626..comments2024-03-18T02:43:22.233-07:00Comments on Antediluvian Salad: Time For the Giant Heron Spinosaurid Analogy to Bite the Dust Part 2: Getting More Than Just Your Feet WetDuane Nashhttp://www.blogger.com/profile/14467779935085970909noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-8161161431451849208.post-47233317124260955072014-12-17T09:06:33.840-08:002014-12-17T09:06:33.840-08:00Belly sliding would be an option in shallow waters...Belly sliding would be an option in shallow waters, etc, but on hard ground it doesn't work too well.<br /><br />That said, a waddle isn't really graceful either, and I doubt that it spent much time on land (was is possibly viviparous?)BKhttps://www.blogger.com/profile/03759189747932749283noreply@blogger.comtag:blogger.com,1999:blog-8161161431451849208.post-12708298864018696512014-12-16T18:50:41.325-08:002014-12-16T18:50:41.325-08:00@Bk Jeong Maybe you are referring to a different p...@Bk Jeong Maybe you are referring to a different post where I actually talk about locomotion?<br /><br />Per the bipedal/quadrupedal argument I have invoked belly sliding - which is not really quadrupedalism, but net really bipedalism either - as an elegant solution for S. aegyptiacus. Not elegant in how it looked, but belly sliding solves the COG problem, is used by large crocodiles in similar habits today, is used by several extant theropods (penguins, loons), and is merely a co-option of known resting theropod anatomy and therefore require the least amount of evolutionary steps among all scenarios postulated so far. Unlike many I don't see a lot of hope in retrieving fully obligate, pelican/pangolin like or otherwise, for S. aegyptiacus. I can imagine that immature members of the species may have had much more flexibility in choice of locomotory gait.Duane Nashhttps://www.blogger.com/profile/14467779935085970909noreply@blogger.comtag:blogger.com,1999:blog-8161161431451849208.post-77944088399378666202014-12-16T17:02:05.452-08:002014-12-16T17:02:05.452-08:00It should be noted that this thing physically had ...It should be noted that this thing physically had no way of being quadrupedal, even if it did have short legs. The knuckles don't come into proper contact, the shoulders cannot move in the right way and the scapula would rip its head off. <br /><br />I imagine a pelican-like waddle as being much more likely.BKhttps://www.blogger.com/profile/03759189747932749283noreply@blogger.comtag:blogger.com,1999:blog-8161161431451849208.post-31414128761511819652014-11-08T06:18:19.093-08:002014-11-08T06:18:19.093-08:00Very nice to see convergence on thought and I do r...Very nice to see convergence on thought and I do read your blog constantly so your thought informs a lot of what i write either directly or subconsciously. And I remember the picture you mention. I am not trying to lay claim to the "stork analogy" just sway the discussion in that direction. Because, in my estimation, the "heron" model still dominates in most minds. For example in the NOVA documentary they still use "heron" style hunting and even in the Nat Geo article on the new spino Ibrahim still relates it to acting like a heron. <br /><br />But I do lay claim to "storkodile" :^)Duane Nashhttps://www.blogger.com/profile/14467779935085970909noreply@blogger.comtag:blogger.com,1999:blog-8161161431451849208.post-88943394499114347812014-11-07T22:43:25.692-08:002014-11-07T22:43:25.692-08:00In various posts in my blog - well before the new ...In various posts in my blog - well before the new information by Ibrahim et al. paper - I have suggested that the most plausible explanation of snout and vertebrae unusual features in spinosaurids are adaptations for a permanently flexed posture with half of body submerged, snout projected anteroventrally, foraging underwater (http://img.webme.com/pic/s/spinosauridae/spinosaurus_fishing.jpg). In a discussion with Simone Maganuco, he first used the "stork analogy" about five years ago.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.com