palaeonemertean
/ˌpalɪəʊnɪˈməːtɪən/ /ˌpeɪlɪəʊnɪˈməːtɪən/Zoology
noun
A ribbon worm (nemertean) of the order Palaeonemertea (class Anopla).
adjective
Of or relating to the order Palaeonemertea (class Anopla) of ribbon worms.
Origin
Late 19th century; earliest use found in George Rolleston (1829–1881), physician and physiologist. From scientific Latin Palaeonemertea, order name + -an, after nemertean.