tag:blogger.com,1999:blog-3433304117507034540.post145064767875730816..comments2024-03-27T10:06:07.100-07:00Comments on The Echinoblog: The Diversity of Echinoderm Anuses! ChrisMhttp://www.blogger.com/profile/11784970666468925633noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-3433304117507034540.post-13026168765613915482016-06-11T06:16:32.211-07:002016-06-11T06:16:32.211-07:00Johnn
those are actually spines! But there are s...Johnn<br /> those are actually spines! But there are snails that do clamp down over the anuses of Paleozoic crinoids. Not here though. Great question. thanks!<br />chrisChrisMhttps://www.blogger.com/profile/11784970666468925633noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-73590938646631783332016-06-11T05:51:59.233-07:002016-06-11T05:51:59.233-07:00Hi I was just wondering if those are gastropods of...Hi I was just wondering if those are gastropods of some sort clustered half way up the on the anal cone/chimney of the Uperocrinus nashvillae Johnn Moraleshttps://www.blogger.com/profile/18410754869779549100noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-20321306292000753172016-05-25T02:58:02.561-07:002016-05-25T02:58:02.561-07:00When I was a little kid, I thought the sea urchin ...When I was a little kid, I thought the sea urchin anal sac was an eyeball... Anybody else?DarySakaFitradyhttps://www.blogger.com/profile/01906066189537378325noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-62513179882515758242016-05-09T00:39:39.998-07:002016-05-09T00:39:39.998-07:00Ultimately I'd love to know the function. Als...Ultimately I'd love to know the function. Also wondered what had been observed about the behavior of the anal sac: like if the feces goes out detectably different than it went in, or if there are patterns to the timing of feces release, or other pieces that might put together the 'why'.Elihttps://www.blogger.com/profile/05711511939799573430noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-26488308590961151382016-04-29T06:01:51.852-07:002016-04-29T06:01:51.852-07:00So basically your question is, what is the functio...So basically your question is, what is the function of the anal sac? I'm not sure its been positively identified. I suspect that for whatever reason, the sacs expel the feces farther away from the body. Perhaps because of their food? Other tropical urchins lack this sac so, hard to say. ChrisMhttps://www.blogger.com/profile/11784970666468925633noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-67228086392943177292016-04-28T22:12:57.386-07:002016-04-28T22:12:57.386-07:00What does the diadematid anal sac do with the poop...What does the diadematid anal sac do with the poop once it has it? Is it serving a purpose like the crinoid anal chimneys (but seems less necessary here), or something different, like batching the release? (Like if predators would home in on continuous leakage, or I could make up other stories.)Elihttps://www.blogger.com/profile/05711511939799573430noreply@blogger.com