noun, plural am·phi·ox·i [am-fee-ok-sahy] /ˌæm fiˈɒk saɪ/, am·phi·ox·us·es.
Origin of amphioxus
Examples from the Web for amphioxus
Wilson, separation of segmentation spheres of amphioxus egg, 60.The Biological Problem of To-day|Oscar Hertwig
They, however, resemble even as much in arrangement and greater number the buccal cirri of Amphioxus.A Guide to the Study of Fishes, Volume 1 (of 2)|David Starr Jordan
Certain arrangements of the pharyngeal wall of Ammocoetes show a remarkable resemblance to what is found in Amphioxus.
Neither the Tunicata nor Amphioxus can by any possibility be on the direct line of ascent from the invertebrate to the vertebrate.The Origin of Vertebrates|Walter Holbrook Gaskell
The egg of the lowest vertebrate, amphioxus, shows these changes in a simple and apparently primitive form.The Whence and the Whither of Man|John Mason Tyler