the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > of or relating to the Anthozoa > belonging to order Zoantharia > relating to secondary mesentery
metacnemic1902
1902 J. E. Duerden in Ann. & Mag. Nat. Hist.9 397 The different fundamental types of metacnemic sequence now known within the Actiniaria and Madreporaria.