tag:blogger.com,1999:blog-5460788270738656369.post6885734054792683445..comments2023-12-24T07:02:43.274+08:00Comments on Catalogue of Organisms: Deep PleurotomellaChristopher Taylorhttp://www.blogger.com/profile/11075565866351612441noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-5460788270738656369.post-51641523880837172202016-03-25T13:50:59.175+08:002016-03-25T13:50:59.175+08:00I'd be surprised if something along those line...I'd be surprised if something along those lines hadn't been done, but I'm not aware of it specifically. I just know that molecular phylogenetic studies I've seen tend to mix direct- and indirect-developing taxa together.Christopher Taylorhttps://www.blogger.com/profile/11075565866351612441noreply@blogger.comtag:blogger.com,1999:blog-5460788270738656369.post-2089001912717022362016-03-24T19:42:29.362+08:002016-03-24T19:42:29.362+08:00Has anyone tried to systematically study what sort...Has anyone tried to systematically study what sort of changes are easy or not? The question would have obvious implications for cladistics.Andreas Johanssonhttps://www.blogger.com/profile/08802392912541974977noreply@blogger.comtag:blogger.com,1999:blog-5460788270738656369.post-51528986574357266492016-03-24T17:31:10.170+08:002016-03-24T17:31:10.170+08:00They can at least easily go from planktotrophy to ...They can at least easily go from planktotrophy to lecithotrophy; I don't know if it necessarily works the other way. I don't think it's that complicated a change, mostly just a matter of developmental timing. Certainly easy changes between indirect and direct development seem to be not uncommon in marine invertebrates.Christopher Taylorhttps://www.blogger.com/profile/11075565866351612441noreply@blogger.comtag:blogger.com,1999:blog-5460788270738656369.post-56984607685282042732016-03-24T14:46:43.017+08:002016-03-24T14:46:43.017+08:00So conoids can easily switch back and forth betwee...So conoids can easily switch back and forth between lecithotrophy and planktotrophy? I might have thought early development like that would be hard to change without changing a lot else.Andreas Johanssonhttps://www.blogger.com/profile/08802392912541974977noreply@blogger.com