the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > having one axis (2)
monaxonid1885
Of, relating to, or designating sponges of the order Monaxonida (class Desmospongiae), characterized by monaxon spicules. Of a sponge spicule: = mo…