Abstract
Gut Evolution![Figure][1] Comb jellies have through-guts. PHOTO: ANDREY NEKRASOV/ALAMY STOCK PHOTO Our understanding of how guts evolved has included a long-held misconception. Despite reports dating back to the 1800s of a gut with more than one opening in metazoans (jellies and comb jellies), textbooks often present this group as having a sac-like gut with only one opening. Presnell et al. housed two species of comb jellies under laboratory conditions and captured high-resolution images of their feeding and excretion. Their detailed imaging revealed that comb jellies do not excrete through the mouth but rather through multiple anal pores, confirming that they do indeed possess a through-gut. These results suggest that our understanding of gut evolution may require a rethink. Curr. Biol. 10.1016/j.cub.2016.08.019 (2016). [1]: pending:yes
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
