Editing Xenopus (section)

===Description===

All species of ''Xenopus'' have flattened, somewhat egg-shaped and streamlined bodies, and very slippery skin (because of a protective mucus covering).<ref name="arizona">{{cite web|url=http://www.iacuc.arizona.edu/training/xenopus/intro.html|title=IACUC Learning Module — ''Xenopus laevis''|publisher=University of Arizona|access-date=2009-10-11|archive-date=2010-06-26|archive-url=https://web.archive.org/web/20100626190703/http://www.iacuc.arizona.edu/training/xenopus/intro.html|url-status=dead}}</ref> The frog's skin is smooth, but with a [[lateral line]] sensory organ that has a stitch-like appearance. The frogs are all excellent swimmers and have powerful, fully webbed toes, though the fingers lack webbing. Three of the toes on each foot have conspicuous black [[claw]]s.
	 
The frog's eyes are on top of the head, looking upwards. The [[pupils]] are circular. They have no moveable [[eyelids]], [[tongue]]s (rather it is completely attached to the floor of the mouth<ref name="arizona"/>) or [[eardrum]]s (similarly to [[Common Suriname toad|''Pipa pipa'', the common Suriname toad]]<ref name="noc-ani">{{cite book| vauthors = Roots C  |title=Nocturnal animals |publisher=Greenwood Press |pages=19 |isbn=978-0-313-33546-4|year=2006}}</ref>).<ref name="passmore">{{cite book | vauthors = Passmore NI, Carruthers VC | date = 1979 | title = South African Frogs | pages = 42–43 | publisher = Witwatersrand University Press | location = Johannesburg | isbn = 0-85494-525-3 }}</ref>
	 
Unlike most amphibians, they have no [[haptoglobin]] in their [[blood]].<ref name="passmore"/>