metapleure
/ˈmɛtəplʊə/ /ˈmɛtəplɔː/(also metapleur) Zoology
noun
A prominent longitudinal fold at the junction of the ventral and lateral surfaces of a lancelet (amphioxus).
Origin
Late 19th century; earliest use found in Quarterly Journal of Microscopical Science. Alteration of metapleuron.